Admins eHow SysAdmin Tips & Tricks

April 25, 2010

Block port 25 in Routing and Remote Access (RAS) to prevent spam

Filed under: General — admin @ 9:05 am

If you have a VPN server running on windows using routing and remote access , some of your users may abuse your VPN service by sending spam emails from your IP.
in order to prevent it , you need to block outgoing port 25 ( SMTP ). here is an illustrated guide on how to do it in RAS :

  • hi,
    when I did this we could not send mail anymore from our exchange server which is on same machine as RAS.
    How do I block smtp port for specific internal ip address?

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