Guido van Rooij wrote: > > > ipfilter with 'keep state' on the connections will automatically allow > > > back in relevant ICMP messages such as mustfrag. > > > > Heh... I need to try to write a "mustfrag" daemon, which will > > spoof them back whenever it sees traffic... and see what happens. > > The sender will start sending smaller segments. That's it. > But if you are in the patch between sender and receiver you can do worse > things than that.
I knew that I could multiply the number of packets sent by a factor of 5... I was pointing out a flaw in the idea of allowing path MTU ICMP back in, unconditionally... Now ask me how to DOS attack any server daemon that works by using the "sendfile" interface... PS: *Don't* ask me how the SYN-cache overflow SYN-cookie code can be ACK-flooded, to make the kernel spend all its time doing MD5 calculations, since that one is obvious... -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
