On Fri, 6 Apr 2001, Gonzalez Albert wrote: > Andrea, > > How could this be reproduced? I have a couple of Reliant Unix boxes over > here. > > Albert > Hi Albert, Just connect from a host to the box via ftp, ssh or telnet and during the connection send from your host an icmp port unreachable (Type 3 code 3), you can use tools like sing or icmpush, with sing the syntax is host# ./sing -du -x port-unreach reliantboxaddress if you want to spoof from another host do host1# ./sing -du -x port-unreach -S host reliantboxaddress Any connections beetween host and reliantbox will be dropped. I've tested this with three different RU server.. Bye > > > Hi to all, > > I don't know if anyone might be interested in this (Reliant Unix is a sort > of archaeological OS) but sending an icmp port unreachable error to a RU > cause an immediate drop of all the connections in progress between the > server and the icmp-sender host, of course spoofing the icmp address > originator cause the drop of connections between an arbitrary host. > > Bye > ----------------------------------------------------------- NE&T Network Administrator & Security Officer Area Science Park - S.S. 14 Km 163.5 Basovizza (TS) - Italy [EMAIL PROTECTED] - PGP Key 0x8E21FE82 - +39 040 3757938 ----------------------------------------------------------- "How would you know I'm mad?" said Alice. "You must be,'said the Cat,'or you wouldn't have come here" -----------------------------------------------------------
