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How to stealth port 21 on Technicolor/Thompson Router?

ratty
Dabbler
Posts: 13
Registered: ‎03-05-2012

How to stealth port 21 on Technicolor/Thompson Router?

Hi
I have just run the tests on grc.com and port 21, although closed, is not stealthed.  I have got Windows Firewall turned off, I'm using Comodo.  However, I think it is the router's firewall settings that need to be changed, but they seem to not be editable.  Can anyone tell me how I can stealth port 21 ftp?  I am using the Technicolor TG582n.
Thanks
9 REPLIES
mattturner
Grafter
Posts: 246
Thanks: 2
Registered: ‎25-06-2009

Re: How to stealth port 21 on Technicolor/Thompson Router?

Hi Ratty,
Could you post the result of this telnet command from your router here?
:service system list expand=enabled
This will allow us to review the configuration of the router services and see if one is misconfigured.
Thanks,
Matt
ratty
Dabbler
Posts: 13
Registered: ‎03-05-2012

Re: How to stealth port 21 on Technicolor/Thompson Router?

Hi here it is.  Thanks for your help.
Regards
Ratty
{admin}=>:service system list expand=enabled
Idx Name            Protocol        SrcPort  DstPort  Group                   
---------------------------------------------------------------------------------
  1 CWMP-C          tcp                                                       
        Description................ CPE Wan Management Protocol Client
        Properties................. client
        Attributes................. state srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... enabled{admin}=>:service system list expand=enabled
Idx Name            Protocol        SrcPort  DstPort  Group                   
---------------------------------------------------------------------------------
  1 CWMP-C          tcp                                                       
        Description................ CPE Wan Management Protocol Client
        Properties................. client
        Attributes................. state srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. Management
        Route Label................ None
  2 CWMP-S          tcp                      51005                           
        Description................ CPE Wan Management Protocol Server
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state port log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 51005
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 51005
        Logging.................... disabled
  3 DHCP-S          udp                      676                             
        Description................ DHCP Server
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 676
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... LocalNetwork
        Interface Group Access List any
        Map List................... 676
        Logging.................... disabled
  4 DNS-C            udp                      53                               
        Description................ DNS Client
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... enabled
        Port....................... 53
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
  5 DNS-S            udp                      53                               
        Description................ DNS Server
        Properties................. relay
        Attributes................. state port srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... state srcip aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 53
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 53
        Logging.................... disabled
        Forwarding................. enabled
  6 DYNAMIC_DNS                                                                 
        Description................ Dynamic DNS
        Properties................. group
        Attributes................. state srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes....
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... none
        Logging.................... disabled
        Forwarding................. enabled
  7 FTP              tcp                      21                               
        Description................ File Transfer
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state port aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 21
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 21
        Logging.................... disabled
  8 HTTP            tcp                      80                               
        Description................ HTTP web server
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 80
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 80
        Logging.................... disabled
  9 HTTPI            tcp                      8080                             
        Description................ HTTP intercept proxy
        Properties................. proxy
        Attributes................. state port srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... map log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 8080
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 80:LocalNetwork 1080:LocalNetwork 8080:LocalNetwork
        Logging.................... disabled
        Forwarding................. enabled
10 HTTPs            tcp                      443                             
        Description................ HTTP web server over ssl
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 443
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 443
        Logging.................... disabled
11 IGMP-Proxy      igmp                                                       
        Description................ IGMP based multicast forwarding
        Properties................. server
        Attributes................. state aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... enabled
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... any interface group
        Logging.................... disabled
12 IP_COMMANDS                                                                 
        Description................ IP connectivity commands
        Properties................. group
        Attributes................. state srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... none
        Logging.................... disabled
        Forwarding................. enabled
13 MDAP            udp                      3235                             
        Description................ Setup and upgrade wizard support
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 3235
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 3235
        Logging.................... disabled
14 PING_RESPONDER  icmp                      8                               
        Description................ ICMP echo responder
        Properties................. server
        Attributes................. state aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup log natpmweight
        Attribute Values :
        State...................... enabled
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 8
        Logging.................... disabled
15 PPTP                                                                       
        Description................ PPTP VPN
        Properties................. group
        Attributes................. state srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... none
        Logging.................... disabled
        Forwarding................. enabled
16 Remote-MBus      tcp                      2006                             
        Description................ MBus daemon connection using INET sockets
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 2006
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 2006
        Logging.................... disabled
17 RIP              udp              520      520                             
        Description................ Routing Information Protocol
        Properties................. peer group
        Attributes................. state port srcip aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 520
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 520
        Logging.................... disabled
18 SLA_ICMP_PING    icmp                      8                               
        Description................ Ping using ICMP for SLA purposes
        Properties................. client
        Attributes................. state srcip qoslabel routelabel
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
19 SLA_UDP_PING    udp                      7                               
        Description................ Ping using UDP for SLA purposes
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 7
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
20 SNTP            udp              123      123                             
        Description................ Simple Network Time Protocol
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... enabled
        Port....................... 123
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
21 SSDP            udp                      1900                             
        Description................ Simple Service Discovery Protocol (UPnP)
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 1900
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 1900
        Logging.................... disabled
22 SYSLOG          udp                      514                             
        Description................ System Logging Events
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 514
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
23 TELNET          tcp                      23                               
        Description................ Virtual Terminal
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state port aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 23
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 23
        Logging.................... disabled
24 WEBF            tcp                      80                               
        Description................ HTTP intercept web filter
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 80
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
25 webservice      tcp                      9000                             
        Description................ WebService API
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 9000
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 9000
        Logging.................... disabled
{admin}=>
        Source Ip Selection........ auto
        QOS Label.................. Management
        Route Label................ None
  2 CWMP-S          tcp                      51005                           
        Description................ CPE Wan Management Protocol Server
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state port log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 51005
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 51005
        Logging.................... disabled
  3 DHCP-S          udp                      676                             
        Description................ DHCP Server
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 676
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... LocalNetwork
        Interface Group Access List any
        Map List................... 676
        Logging.................... disabled
  4 DNS-C            udp                      53                               
        Description................ DNS Client
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... enabled
        Port....................... 53
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
  5 DNS-S            udp                      53                               
        Description................ DNS Server
        Properties................. relay
        Attributes................. state port srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... state srcip aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 53
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 53
        Logging.................... disabled
        Forwarding................. enabled
  6 DYNAMIC_DNS                                                                 
        Description................ Dynamic DNS
        Properties................. group
        Attributes................. state srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes....
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... none
        Logging.................... disabled
        Forwarding................. enabled
  7 FTP              tcp                      21                               
        Description................ File Transfer
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state port aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 21
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 21
        Logging.................... disabled
  8 HTTP            tcp                      80                               
        Description................ HTTP web server
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 80
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 80
        Logging.................... disabled
  9 HTTPI            tcp                      8080                             
        Description................ HTTP intercept proxy
        Properties................. proxy
        Attributes................. state port srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... map log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 8080
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 80:LocalNetwork 1080:LocalNetwork 8080:LocalNetwork
        Logging.................... disabled
        Forwarding................. enabled
10 HTTPs            tcp                      443                             
        Description................ HTTP web server over ssl
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 443
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 443
        Logging.................... disabled
11 IGMP-Proxy      igmp                                                       
        Description................ IGMP based multicast forwarding
        Properties................. server
        Attributes................. state aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... enabled
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... any interface group
        Logging.................... disabled
12 IP_COMMANDS                                                                 
        Description................ IP connectivity commands
        Properties................. group
        Attributes................. state srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... none
        Logging.................... disabled
        Forwarding................. enabled
13 MDAP            udp                      3235                             
        Description................ Setup and upgrade wizard support
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 3235
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 3235
        Logging.................... disabled
14 PING_RESPONDER  icmp                      8                               
        Description................ ICMP echo responder
        Properties................. server
        Attributes................. state aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup log natpmweight
        Attribute Values :
        State...................... enabled
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 8
        Logging.................... disabled
15 PPTP                                                                       
        Description................ PPTP VPN
        Properties................. group
        Attributes................. state srcip aclip aclif aclifgroup map log forward qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... none
        Logging.................... disabled
        Forwarding................. enabled
16 Remote-MBus      tcp                      2006                             
        Description................ MBus daemon connection using INET sockets
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 2006
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 2006
        Logging.................... disabled
17 RIP              udp              520      520                             
        Description................ Routing Information Protocol
        Properties................. peer group
        Attributes................. state port srcip aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 520
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 520
        Logging.................... disabled
18 SLA_ICMP_PING    icmp                      8                               
        Description................ Ping using ICMP for SLA purposes
        Properties................. client
        Attributes................. state srcip qoslabel routelabel
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... enabled
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
19 SLA_UDP_PING    udp                      7                               
        Description................ Ping using UDP for SLA purposes
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state srcip
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 7
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
20 SNTP            udp              123      123                             
        Description................ Simple Network Time Protocol
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... enabled
        Port....................... 123
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
21 SSDP            udp                      1900                             
        Description................ Simple Service Discovery Protocol (UPnP)
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 1900
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 1900
        Logging.................... disabled
22 SYSLOG          udp                      514                             
        Description................ System Logging Events
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 514
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
23 TELNET          tcp                      23                               
        Description................ Virtual Terminal
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state port aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... enabled
        Port....................... 23
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List lan
        Map List................... 23
        Logging.................... disabled
24 WEBF            tcp                      80                               
        Description................ HTTP intercept web filter
        Properties................. client
        Attributes................. state port srcip qoslabel routelabel
        User Managed Attributes.... state qoslabel routelabel
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 80
        Source Ip Selection........ auto
        QOS Label.................. None
        Route Label................ None
25 webservice      tcp                      9000                             
        Description................ WebService API
        Properties................. server
        Attributes................. state port aclip aclif aclifgroup map log qoslabel routelabel natpmweight
        User Managed Attributes.... state aclip aclif aclifgroup map log natpmweight
        Attribute Values :
        State...................... (administratively) disabled
        Port....................... 9000
        QOS Label.................. None
        Route Label................ None
        NAT Portmap Weight ........ 30
        Ip Access List............. any
        Interface Access List...... any
        Interface Group Access List any
        Map List................... 9000
        Logging.................... disabled
{admin}=>
mattturner
Grafter
Posts: 246
Thanks: 2
Registered: ‎25-06-2009

Re: How to stealth port 21 on Technicolor/Thompson Router?

Hi Ratty,
This command will disable the FTP server on the router. I'm not sure why the FTP server is sending TCP reset packets to request from the WAN interface (assuming this is what it is doing...), I've got the FTP server enabled on my TG582n (but just on the LAN interface as yours is) and the packets are dropped silently.
:service system modify name=FTP state=disabled
Let me know if this fixes the issue.
Thanks,
Matt
ratty
Dabbler
Posts: 13
Registered: ‎03-05-2012

Re: How to stealth port 21 on Technicolor/Thompson Router?

Hi
Thanks for your help so far.  I tried your suggestion, but grc.com still reports FTP port 21 as closed but not stealthed.
Regards
ratty
ratty
Dabbler
Posts: 13
Registered: ‎03-05-2012

Re: How to stealth port 21 on Technicolor/Thompson Router?

Hi
In telnet, :service host list gives the result FTP Server host = 192.168.1.253 Server.
What would be the security and useability ramifications of typing
:service host disable name="FTP Server"
Thanks for your time and help so far.
Regards
Ratty
ratty
Dabbler
Posts: 13
Registered: ‎03-05-2012

Re: How to stealth port 21 on Technicolor/Thompson Router?

Hi
This has stealthed the port, but I'd like to be sure that it is the correct command to put in to do this securely.
Thanks.
ratty
mattturner
Grafter
Posts: 246
Thanks: 2
Registered: ‎25-06-2009

Re: How to stealth port 21 on Technicolor/Thompson Router?

Hi Ratty,
Service Host is where port forwarding rules are set up. It looks like port 21 is forwarded from the WAN IP to LAN IP 192.168.1.253.
I'll check with Technicolor and see why this is.
Thanks,
Matt
mattturner
Grafter
Posts: 246
Thanks: 2
Registered: ‎25-06-2009

Re: How to stealth port 21 on Technicolor/Thompson Router?

OK, we know why it was forwarded, it is for the FTP functionality of the file server from the USB port.
The command you ran will probably prevent this from being accessible on the WAN if you ever chose to set it up.
You've fully disabled it with the command you ran.
Thanks,
Matt
ratty
Dabbler
Posts: 13
Registered: ‎03-05-2012

Re: How to stealth port 21 on Technicolor/Thompson Router?

Okay.  Thanks for all of your help.
Regards
Ratty