[2957] in linux-net channel archive
Re: [masq] Re: ftp problems w/masq & 1.99.5 kernel
daemon@ATHENA.MIT.EDU (Nigel Metheringham)
Mon May 20 14:29:19 1996
To: "William E. Roadcap" <roadcapw@cfw.com>
cc: masq@indyramp.com, Bjorn Ekwall <bj0rn@blox.se>,
linux-net@vger.rutgers.edu, Alan Cox <alan@cymru.net>
From: Nigel Metheringham <Nigel.Metheringham@theplanet.net>
In-reply-to: Your message of "Mon, 20 May 1996 10:57:33 EDT."
<Pine.LNX.3.91.960520103020.300A-100000@titus.cfw.com>
Date: Mon, 20 May 1996 16:16:14 +0100
[Cc: list reduced - this doesn't seem to need Linus and others
included]
[elided original message and answer suggesting that the ftp module is
needed]
roadcapw@cfw.com said:
} I tried this, and now the ftp session hangs BEFORE I get the
} "...command successful.." message and never returns at all. Prior to
} using ip_masq_ftp.o "ls" would return the "successful" message, a
} _long_ wait and the "...can't open data connection..." message.
Odd.... seems OK here.
} In addition, when I first load the ipmasq_ftp module, lsmod reports that it
} is used by "0" until I try to make a ftp connection from the localnet, then
} lsmod reports it is used by "1" and then it can't be unloaded even if I
} shutdown all network interfaces.
Thats correct. The module should stay inuse until the control
connection terminates - ie 2 minutes after a TCP FIN packet, or 15
minutes after the last activity. Use "ipfwadm -l -M" or "cat
/proc/net/ip_masquerade" to see connections that are still active.
} Bjorn, THIS MIGHT INTEREST YOU:
} If I load the module with insmod or modprobe and don't use it within a
} short time, kerneld unloads it even though it wasn't loaded by
} kerneld or marked as autoclean! So, I killed kerneld and the module
} doesn't auto-unload, but it still doesn't work...
I don't see this problem with my config - using modules 1.3.69j
} If there is another step I need to take, please tell me. I can find no
} docs on using ip_masq_ftp, I'm stumped. If there is any particular info
} from my systems that might help anyone, I'll cheerfully send it over.
Fragmentation may be a problem. In fact MTU discovery could be.
} I'm about to install 1.99.6, but I don't see anything in the patch that
} might help this.
Try 1.99.6 with the patch I posted to the masq list and linux-net an
hour or 2 ago (or I can send it direct - just ask).
Nigel.
--
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