Hi All,
Could you pls analyze the following transcript of my session with a remote server and help me judge whether the server is in some sense an open relay...One thing abt the server is that it passes all anonymous relaying tests.....but what if i know two contacts on the same server..
---------------------------------------------------- [root@bijucyborg root]# telnet 2XX.1XX.XXX.XX 25 Trying 2XX.1XX.XXX.XX... Connected to 2XX.1XX.XXX.XX. Escape character is '^]'. 220 COPSTOP.com ESMTP ehlo popa 250- COPSTOP 250-PIPELINING 250 8BITMIME mail from:xyz@COPSTOP 250 ok rcpt to:abc@COPSTOP.com 250 ok data 354 go ahead we went to school together . 250 ok 1099213953 qp 10543 quit 221 COPSTOP.com Connection closed by foreign host. ------------------------------------------------------
As I have observed the server accepts message from xyz@COPSTOP to abc@COPSTOP.
1. xyz and abc are two valid users on the system. 2. This session was carried from a random machine on the internet.
If this is dangerous....assuming that i'am using sendmail, could u pls suggest a technique to stop this.
bye rgds
biju
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