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Why do I (not) need a firewall?


Joerg
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I've got a pc running debian which provides only ssh (-p 22).

If I use iptables to block all incoming traffic not related to port 22, does that really make sense? I mean, there are no other services listening on a port.

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I've got a pc running debian which provides only ssh (-p 22).

If I use iptables to block all incoming traffic not related to port 22, does that really make sense? I mean, there are no other services listening on a port.

You do have a firewall that's what iptables is doing for you. You'll want to throttle port 22 incoming though.

http://www.debian-administration.org/articles/187

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I've got a pc running debian which provides only ssh (-p 22).

If I use iptables to block all incoming traffic not related to port 22, does that really make sense? I mean, there are no other services listening on a port.

you don't really need a firewall unless you're giving other users access to the box and you don't want them running anything that listens

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