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FTP sessions limit

decomplexity
Rising Star
Posts: 493
Thanks: 26
Registered: ‎30-07-2007

FTP sessions limit

The maximum number of FTP sessions PN Apache allows at any one time across all users is, I believe, closely capped.
However, DAK if there are/were different caps on FTP transfers:
- between PN servers (e.g. Home pages < = >PN CCGI; Home pages < = > PAYH)
- between PN and non-PN servers (Home pages < = > Hostopia)
- between user client FTP agents and PN servers
possibly governed on IP address range?
Why the question? Some of my websites make extensive use of (passive) FTP transfers of small files from Home pages to Hostopia PHP. After updating, these files are transfered back again.
After moving my PHP from PAYH to Hostopia, around 90% of ftp_connect operations fail initially but almost always connect immediately when retried. (This, in passing, seems very odd anyway since if this is caused by an inability to get an FTP session, an FTP sessions cap should not present itself so 'asymmetrically')
Zen from May 17. PN Business account from 2004 - 2017
6 REPLIES 6
bobpullen
Community Gaffer
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Re: FTP sessions limit

Quote from: decomplexity
- between PN servers (e.g. Home pages < = >PN CCGI; Home pages < = > PAYH)

That I'm not sure of.
Quote from: decomplexity
- between PN and non-PN servers (Home pages < = > Hostopia)

Neither that.
Quote from: decomplexity
- between user client FTP agents and PN servers

For Homepages, that's in the MOTD:
C:\Windows\System32>ftp ftp.plus.net
Connected to ftp.plus.net.
220-PLEASE NOTE: If you have a non-subscription account you
220-will only be able to login to this ftp server if you are
220-dialled into our network.
220-
220-A Maximum of 4 concurrent connections are allowed to this
220-server, each session is limited to 256KB/s downloads.
220-
220 Plus.Net FTP Server #1 ready
User (ftp.plus.net:(none)):

Quote from: decomplexity
Why the question? Some of my websites make extensive use of (passive) FTP transfers of small files from Home pages to Hostopia PHP. After updating, these files are transfered back again.
After moving my PHP from PAYH to Hostopia, around 90% of ftp_connect operations fail initially but almost always connect immediately when retried. (This, in passing, seems very odd anyway since if this is caused by an inability to get an FTP session, an FTP sessions cap should not present itself so 'asymmetrically')

Several problem dialogues I've had with Hostopia suggest that they tightly restrict the use of outbound connections to other hosts, however this doesn't really explain the symptoms you're reporting. We could do with some more detail around this and a test script to provide the evidence to Hostopia in a fairly simple format.

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵

decomplexity
Rising Star
Posts: 493
Thanks: 26
Registered: ‎30-07-2007

Re: FTP sessions limit

Test script available - details are in ticket #88006630
Max
Zen from May 17. PN Business account from 2004 - 2017
bobpullen
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Re: FTP sessions limit

Thanks for that Max, very helpful indeed. I've queried the problem with Hostopia and will give you a nudge once we've received a response...

Bob Pullen
Plusnet Product Team
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bobpullen
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Re: FTP sessions limit

I've had word that this should now be fixed.

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵

decomplexity
Rising Star
Posts: 493
Thanks: 26
Registered: ‎30-07-2007

Re: FTP sessions limit

Thanks for your support Bob.
Looks good at the moment.
For future reference (and since it was a far from straightforward problem), did Hostopia say what they had amended ?
Zen from May 17. PN Business account from 2004 - 2017
bobpullen
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Re: FTP sessions limit

In a word - no Undecided

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵