Michael Robinson <[EMAIL PROTECTED]> wrote in list.freebsd-stable: > Last night, I was running a very large Postgresql query on one of my > colocated development servers when all of a sudden the session completely > froze. Since then, I can get TCP connections to all the open ports, but > they just hang with no services ever coming up. Ping works fine. I have once written a small kernel hack which I called "ICMP REBOOT". When you send a certain ICMP packet from a certain host or network, the machine logs the host and panics. The packet can be sent with a modified ping command. It is very useful, because the reception of ICMP packets is performed by the kernel on the lowest level in the interrupt handler, which means that there's a good chance that it will still work, even if the system is pretty much dead. This hack saved my life a few times. ;) I considered submitting the patch, but I guess it wouldn't be committed because it's a "dirty hack". Someone else who has access to your network could easily reboot your box using IP- spoofing, because it's authenticated by IP addresses only. It's probably a good idea to use it behind a firewall that drops unknown ICMP packets. If someone is interested, I've put the hack online here: http://www.fromme.com/icmpreboot.tar.gz Please read the README file. Use at your own risk. Regards Oliver -- Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany (Info: finger userinfo:[EMAIL PROTECTED]) "In jedem St�ck Kohle wartet ein Diamant auf seine Geburt" (Terry Pratchett) To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-stable" in the body of the message
