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Web Access problems, maybe DHCP related

N/A

Web Access problems, maybe DHCP related

Hi all,

Hope I am posting to the correct forum

I have just joined Plusnet and whilst impressed with the speed, I am having a serious problem connecting to the net. I set everything up on Sunday and all seemed fine until we tried to browse the net. About 50% of the pages we went to, at random, were unavailable. They sometimes became available on refresh. I got through to plusnet support, and to be fair, they stayed on the phone with me for over an hour, turning of this firewall, changing this security setting etc but nothing changed. Support left it with the suggestion I try re-connecting my router to my old ISP (on the other telephone line) and seeing if there was a fault with the router.

On Monday, I found a solution, turn off my W2K Pro Server. Yup, everything works fine now, however, I no longer have a home network and cant access shared files, printers or the other PCs.

I disabled some of the services on the server, i.e. DNS server and DHCP server but still cannot get both the WAN and LAN working at the same time. I wonder if there is a W2K Server Adminstrator out there who knows the short and simple answer to this. I can post more details of the exact setup, but not sure what would be helpful.

The situation atm is as follows

2 PCs dual booting w98 and w2k. Loaded with the 4 DNS servers from plusnet
1 Server running W2k Server, with DNS and DHCP server disabled.

If the server has DHCP client disabled, the net works fine, but we can't see the server, or log on, or use shared resources (The server can see the net)

If the server has DHCP client enabled, then the home lan works fine, but access to the net is almost nil (a few pings on 212.150.13.49 either timed out or gave only 1 in 4 results). As soon as I turn the server off, the net works.

Any ideas on what to do next folks?

Thanks for reading this
7 REPLIES
N/A

Web Access problems, maybe DHCP related

We need to know a few things.
How do you connect to the imternet ie router or modem on the server?
Can you post an ipconfig /all from a pc first when dhcp is working and again without it?

Are you sure the dhcp that is picke dup is from the server or could it be the router?

Is the server running AD?
N/A

Web Access problems, maybe DHCP related

I have also recently having thses problems. Some times the webstes wont load. Some times on refresh they wont load. Website which normally load dont load. :? I am running a router and was using a rounter when the webpages loaded fine. I didnt chnage any settings either. Some images also wont load for me such as Avatars on the Facepunch forums http://forum.facepunchstudios.com. I asked a different user on the forums they said they can see them fine. :?
N/A

Web Access problems, maybe DHCP related

Thanks for the reply.

Both PCs and the server are connected to the router/modem via ethernet.
The dhcp is served by the router. On the server, DNS, DHCP and Routing/Remote Access are all disabled. However DNS client is enabled on the server. With DHCP client disabled on the server I get the following on my PC



Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

G:\>ipconfig/all

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : general
Primary DNS Suffix . . . . . . . : LYTTON.local
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : LYTTON.local
Lytton

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : Lytton
Description . . . . . . . . . . . : Realtek RTL8029(AS)-based PCI Ethern
et Adapter
Physical Address. . . . . . . . . : 52-54-05-E4-55-31
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.2.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.2.1
DHCP Server . . . . . . . . . . . : 192.168.2.1
DNS Servers . . . . . . . . . . . : 212.159.13.49
212.159.13.50
212.159.6.9
212.159.6.10
Lease Obtained. . . . . . . . . . : 01 November 2005 18:30:36
Lease Expires . . . . . . . . . . : 01 November 2006 18:30:36

G:\>ping 212.159.13.49

Pinging 212.159.13.49 with 32 bytes of data:

Reply from 212.159.13.49: bytes=32 time=19ms TTL=61
Reply from 212.159.13.49: bytes=32 time=14ms TTL=61
Reply from 212.159.13.49: bytes=32 time=14ms TTL=61
Reply from 212.159.13.49: bytes=32 time=15ms TTL=61

Ping statistics for 212.159.13.49:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 14ms, Maximum = 19ms, Average = 15ms

As soon as I enable DHCP client on the server (so that I can see it and log on to it etc) I get the following.
Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

G:\>ipconfig/all

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : general
Primary DNS Suffix . . . . . . . : LYTTON.local
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : LYTTON.local
Lytton

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : Lytton
Description . . . . . . . . . . . : Realtek RTL8029(AS)-based PCI Ethern
et Adapter
Physical Address. . . . . . . . . : 52-54-05-E4-55-31
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.2.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.2.1
DHCP Server . . . . . . . . . . . : 192.168.2.1
DNS Servers . . . . . . . . . . . : 212.159.13.49
212.159.13.50
212.159.6.9
212.159.6.10
Lease Obtained. . . . . . . . . . : 02 November 2005 12:22:35
Lease Expires . . . . . . . . . . : 02 November 2006 12:22:34

G:\>ping 212.159.13.49

Pinging 212.159.13.49 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Reply from 212.159.13.49: bytes=32 time=15ms TTL=61

Ping statistics for 212.159.13.49:
Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),
Approximate round trip times in milli-seconds:
Minimum = 15ms, Maximum = 15ms, Average = 3ms

and very little net connections.

You asked if the server is running AD. If you mean Active Directory, then yes it is. The server is the domain controller.

Hope this information helps and thanks again for replying
N/A

Web Access problems, maybe DHCP related

The print out doesnt seem to run true its a bit strange having a year lease on dhcp.

So we know what we are doing lets switch from dhcp to a fixed ip so we have control and know were we are.

Set each pc to static ip and give them the following
IP Address. . . . . . . . . . . . : 192.168.2.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.2.1
DNS Servers . . . . . . . . . . . : 192.168.2.1
212.159.13.49
212.159.13.50

Set each pc and the server the same but change the last number of the ip so you will have ip from 192.168.2.2 to 192.168.2.20

I have set the dns to the router which on 90% of routers will work if it doesnt try 194.119.131.66

You should have dns running on the server or AD will throw a wobbler. Try and see if it works if it doesnt do a tracert 194.119.131.66 and post the results and also form the pc and server do a route print (from a cmd prompt)

If it wont work try ipconfig /flushdns and see if that does anything
N/A

Web Access problems, maybe DHCP related

Thanks, tried that, has not fixed the problem. (I had already done a flushdns on all 3 systems)

I have done the tracert and copied below, I don't know what a route print is, sorry.

With DHCP client enabled on the server, pc gives me
G:\>tracert 194.119.131.66

Tracing route to cns1.uk.vianw.net [194.119.131.66]
over a maximum of 30 hops:

1 1 ms <10 ms <10 ms 192.168.2.1
2 17 ms 18 ms 16 ms lo0-plusnet.ptn-ag1.plus.net [195.166.128.123]
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 25 ms 38 ms * cns1.uk.vianw.net [194.119.131.66]
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * 45 ms 18 ms cns1.uk.vianw.net [194.119.131.66]

Trace complete.

and server gives me
Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

C:\Documents and Settings\Administrator.COMMANDER>tracert 194.119.131.66

Tracing route to cns1.uk.vianw.net [194.119.131.66]
over a maximum of 30 hops:

1 1 ms <10 ms 1 ms 192.168.2.1
2 17 ms 18 ms 16 ms lo0-plusnet.ptn-ag1.plus.net [195.166.128.123]
3 * * * Request timed out.
4 * 18 ms 15 ms ge0-0-0-23.pte-gw2.plus.net [212.159.4.26]
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * 29 ms 25 ms cns1.uk.vianw.net [194.119.131.66]

Trace complete.

C:\Documents and Settings\Administrator.COMMANDER>



With the server turned off, I get the following on the PC

G:\>tracert 194.119.131.66

Tracing route to cns1.uk.vianw.net [194.119.131.66]
over a maximum of 30 hops:

1 1 ms <10 ms <10 ms 192.168.2.1
2 17 ms 16 ms 20 ms lo0-plusnet.ptn-ag1.plus.net [195.166.128.123]
3 16 ms 17 ms 16 ms ge0-0-0-103.ptn-gw2.plus.net [84.92.3.18]
4 15 ms 15 ms 16 ms ge0-0-0-23.pte-gw2.plus.net [212.159.4.26]
5 * * * Request timed out.
6 26 ms 30 ms 27 ms t40-cr1-ge-5-0.router.uk.clara.net [195.8.86.149
]
7 20 ms 15 ms 26 ms t40-dr1-ge-0-1.router.uk.clara.net [195.8.68.70]

8 17 ms 17 ms 17 ms cns1.uk.vianw.net [194.119.131.66]

Trace complete.

G:\>
N/A

Web Access problems, maybe DHCP related

Idealy I wanted to see what the results were if you used the fixed IP and turned off the dhcp servers. With the dhcp running we cant be sure were its getting its IP from so it makes it hard to trace the problem.

The route print is just typed in on a cmd prompt like ipconfig.

The tracert show that on both configs you are getting out via the router ok and its timing out either at plus net or your router but its clearing your network ok and that side is working.

The timeout could be plus net your router or it could be an MTU problem or it could be somthing on your network flooding the router. You need to work through slowly and isolate whats happening.

Set the static ip have just one pc connected to the router and test that with the tracert/webpages and get that working without time outs. You can try changing the MTU start with the router if you can ping from the router and change the mtu for the best setting.

Having got the best from the router move on to the pc and try that add 1 pc at a time and see were the problem starts. You say you have some running win98 check it doesnt have Netbui running as that can swap the network.

The other thing is something on the network could be flooding the network which would give time outs so watch out for that.

Make sure before changing MTU etc you know what the setting were so you can get back to it. The forums have lots of things on MTU
N/A

Web Access problems, maybe DHCP related

Problem solved.

The server, which never goes on the net, had a virus. Actually, had many virus. The anti-virus software on the server had upgraded itself, to a new version that no-longer supports servers!

Whether the virus hit the server as soon as we went to plusnet from mistral, or whether it was already there and mistral was not affected by it, I don't know.

Having booted the server in safe mode and run clean-sweep on it, all is okay now.

Thanks for your advice and help

Mark