Thanks to everyone so far for the suggestions; I have a few things to try.
Some things I want to note: 1) Yes, I am certain that when I load and unload the modules, they are really loaded or unloaded. I did check with lsmod. I am also certain that the problems I am having are 100% correlated with whether the zaptel drivers are loaded. No driver, no problem, load driver, problems return. 2) I do not have an IRQ conflict (at least not directly; no shared interrupt numbers in /proc/interrupts) 3) The zaptel drivers do function properly when loaded. Asterisk works with my Digium card. 4) SSH itself works fine. It is only the initial key negotiation that fails when zaptel is loaded. If I stop asterisk and unload zaptel, then I can ssh in, and if I then reload zaptel and restart asterisk, my already-established ssh session works fine. The same thing happens with the ipsec-tools/racoon tunnel. If I start racoon on both ends and let it set up the SA, I can then reload zaptel and asterisk and the tunnel works fine. When the SA times out and racoon has to renegotiate the SA, it fails with a similar type of message, as though the packets it is seeing are malformed. 5) All other network-related traffic works fine, whether or not zaptel is loaded. It is only things related to RSA key negotiation that fail. 6) The zaptel driver also affects the sound. I get extraneous beeps and pops in the playback stream. Some things I will try: 1) Zaptel 1.4.1 2) See if Zaptel 1.4.1 will build with a newer kernel, and if so, whether the newer kernel makes a difference. 3) Disabling non-essential stuff in the BIOS (I'm pretty sure I already did that, but I do see a floppy in my interrupts list even though the system doesn't have a floppy drive installed, so I will check) 4) Unloading the sound driver and/or removing the sound card (#6 above suggests this might help) I will report back on the results. Thank you all very much for the suggestions. This is a problem that I must find a solution to. --Greg _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users