Re: [twsocket] FTP server no timeout

[Arno Garrels]

Angus Robertson - Magenta Systems Ltd wrote:
> It seems strange Windows (only XP on this particular server) does not
> timeout the TCP/IP with no keep alives, or is this something I have to
> set?
> Otherwise the FTP server really needs a time out for each
> client, triggered from a timer.

I won't use keep alives in the FTP server but a client timeout triggered
by a single timer. Lengthy transfers on the data channel should not
trigger a timeout of the control channel, like many FTP servers do.

Arno Garrels


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[twsocket] FTP server no timeout

[Angus Robertson - Magenta Systems Ltd]

I have a V6 FTP server running in an airport car park with a WLAN and
two buses driving past it all day, calling home whenever they detect the
WLAN.  The buses don't always complete their FTP session before driving
beyond WLAN range, leaving the FTP control connection open, seemingly for
ever.  Yesterday there were 19 open sessions, despite only two client PCs.


FTP Server: Client Connect from 192.168.16.19 [ClientWSocket527] (Total
Clients: 19)

It seems strange Windows (only XP on this particular server) does not
timeout the TCP/IP with no keep alives, or is this something I have to
set?  Otherwise the FTP server really needs a time out for each client,
triggered from a timer.  

Another server using IIS/5 for a different application has a similar
problem with WLAN loss, but Microsoft seems to support a timeout in IIS. 

NT Event, source: MSFTPSVC, info: User metroline2 at host 192.168.31.23
has timed-out after 900 seconds of inactivity.

Angus
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