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Probably in than email is outgoing means servers have to reply but beyond that, what's the bare minimum portlist that a public-facing webserver (iis7 with same-box sql) have to admit?

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up vote 3 down vote accepted

If you're using defaults -

80 is HTTP

443 is HTTPS

Just 80 if you don't use HTTPS

And then any ports you need open for remote access if you need it.

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Just 80 is all you need for public web service. Add 443 if you have SSL in the mix.

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