If this is your mail gateway and this you are using for sendig and recieving mails over the internet then you cannot restrict access to port 25 as this is required for its purpose. One way is to put some filtering mailing gatway that will restrict any smtp spoofing. i.e. this gateway will not accept messages from external network with source e-mail id containing your mail domain suffix. Also you can restrict SMTP relay.
i hope this help rgds Madhur -----Original Message----- From: Navin Mehra/MUM/IN/STTL [mailto:[EMAIL PROTECTED]] Sent: Monday, March 25, 2002 10:26 AM To: [EMAIL PROTECTED] Subject: Restrict telnet to port 25 via firewall. Hi, I have a Lotus Notes mail server behind my Pix firewall 5.3(1), the problem is anyone from outside is able to telnet my smtp port 25 and compose a mail and send it. The issue is though my mail server restricts free relay he/she can compose a mail via telnet to port 25 in name of anyone else in the same domain and send a false mail on his behalf. So is there anyway where by I can block the telnet to port 25 and thereby stop the composition of a mail. Is there a way to authorise/restrict access the telnet to service ports. Requesting assistance Regards Navin Mehra Softcell Technologies Ph. 460 6969 Extn. 220 _______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls _______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls
