This is one that will take some noodling.
The situation is this. I have SME 5.6 unsupported running on a PII with 256 meg of ram and a 10 gig hd. When ever I access webmail from an external IP the external interface stops responding and I have to log in from an internal ip, and reset the machine. (service network restart does not work). But all the while I can ping the external IP from the box or any internal box but request times out if I ping outside the box.
If I access webmail from an internal IP, everything works as expected. This is the oddest bug I have ever seen. Things I have done that MIGHT be a factor. The box was built as 5.6 then a 5.5 backup to desktop was restored to it. I presume that is a common occurrence. I applied the VPN 'fix' (which seems to have helped the VPN) Updated the glibc as discussed in
http://forums.contribs.org/index.php?topic=6523.msg23442#msg23442. Installed PHPMyAdmin, Netjuke. Also PHPbb, and accompanying MySQL databases have been installed for several ibays.
The only thing I saw that was odd in the /var/log/messages around the time of the 'crash' was a reference to a USB device being initialized. I am not aware of any USB support on that box, but I guess it may have something on the MOBO that I don’t use.
If anyone can help me I will greatly appreciate it. I have considered building a new 5.6 box and restoring a backup to that box to try to rule out any Hardware issues, but I think it really has to be 5.6 related in someway because 5.5 ran flawlessly on this same hardware with out so much as a burp for many months. All problems have appeared since I upgraded to 5.6.