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North American Network Operators Group

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Re: How do you stop outgoing spam?

  • From: alex
  • Date: Tue Sep 10 09:40:19 2002

> If somebody is ignorant enough to implement IP over HTTP, why should
> they be accommodated? There are numerous reasons why there are other 
> port numbers to TCP than 80 and other protocol numbers to IP than 6.

Unlike some people that immediately jump to conclusions, that someone may be
not arrogant, but bright - using port TCP 80 is an excellent way to bypass
firewalls. If your firewall performs content analysis, one can simply encode
the data in valid HTML code.

Alex





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