[ILUG] Strange FTP problem

[Dave Airlie]

dare I suggest packet sniffer? my guess is the NAT is knackering the FTP,
make sure passive is workingon the server and client ... active probably
won't work ..

Dave.


On Fri, 26 Oct 2001, Niall O Broin wrote:

> A colleague of mine recently upgraded his internet access from ISDN to ADSL
> and has encountered a strange FTP problem. It seems most likely that the
> problem is related to the 3Com ADSL router which also does NAT for his
> network but as the problem is only on one server (so far) I'm hoping I can
> resolve it on the server side.
>
> The problem is that when he connects to the server and gets data (e.g. does
> an ls) the client hangs. We've been in touch with the author of wu-ftpd and
> he suggested that recompiling wu-ftpd and giving the --enable_bad_clients to
> configure might work because some clients incorrectly don't wait for a close
> from the remote end. Tried that, didn't work :-(
>
> The curious thing is that it's only on this one server which is running
> RH6.2. If I take a copy of the ftpd binary (a slightly earlier version of
> wu-ftpd) which is running on another server (RH5.3) the problem still exists.
>
> As I write this it occurs to me that this might be kernel related, the two
> mentioned boxes having different kernel versions, (the working one has 2.2.6
> and the non working 2.2.14), but as these boxes are colo'ed in the US kernel
> upgrades are a tad tricky. Two kernel monte would help, but I'd have to
> compile a kernel with TKM support - anyone see the problem here :-)  ?
>
>
> Suggestions welcome - very welcome, even.
>
>
>
>
> Regards,
>
>
> Niall
>
> P.S. One good suggestion is obviously to use scp which I am trying to
> persuade him to do. Mind you, he's a Mac user and I'm sure he'll miss his
> cute Macintosh GUI FTP client.
>
>

-- 
David Airlie, Software Engineer
http://www.skynet.ie/~airlied / airlied at skynet.ie
pam_smb / Linux DecStation / Linux VAX / ILUG person