dmiller at metheus
May 2, 2012, 2:35 PM
Post #1 of 1
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Outgoing FTP dies mysteriously after upgrading to 10.2.01z
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We have two sets of servers that move data about with FTP. No, I can't get the developers to fix it with a serious protocol:) We protect/load balance everything with a pair of ServerIrons.
The two sets are NAT'd out to different IP addresses. We're nowhere near any NAT limit; we might have a few thousand incoming connections to our web servers and less than a hundred outgoing connections.
The problem is that maybe 5% of the time part of the connection 'goes away' from the client perspective. Oddly enough, the application gets a 421 response code from the remote FTP server, indicating that the control channel is still open. The 421 response always comes right at the 5 minute mark, the timeout limit of the FTP server. I'm guessing serverIron is closing the data connection a bit before the remote server is ready for that.
It worked under 10.2.01o; a recent upgrade to rev Z broke it. We upgraded to Z because outgoing connections to remote web servers were failing.
It's sporadic enough I can't come up with a good test case for it. It's positively the serverIrons; changing the outgoing route to a <shudder> sonicwall fixes the problem.
Machine particulars follow. Hints/suggestion on how to solve or better debug the problem most welcome.
--- David
SSH [at] Foundry#sho ver
SW: Version 10.2.01zTI4 Copyright (c) 1996-2007 Foundry Networks, Inc.
Compiled on Feb 13 2012 at 16:56:21 labeled as WJR10201z
HW: Stackable Router, SYSIF version 21, Serial #: Non-exist
==========================================================================
ServerIron 4G SSL, SYSIF 2 (Mini GBIC)
Serial #: CH10080936
0 MB SHM, 1 Application Processors
4096 KB BRAM, JetCore ASIC IGC version 49
SW: (1)10.2.01zTJ3
32768 KB PRAM and 2M-Bit*1 CAM for IGC 0, version 0449
==========================================================================
1.0 GHz Power PC processor 750GX (version 7002/0102) 66 MHz bus
512 KB boot flash memory
16384 KB code flash memory
512 KB SRAM
512 MB DRAM
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