Shorewall: temporarily drop incoming traffic except port 22?

Posted by Magnetic_dud on Server Fault See other posts from Server Fault or by Magnetic_dud
Published on 2010-05-18T11:01:47Z Indexed on 2010/05/18 11:11 UTC
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shorewall

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linux

When I work on configuration files, especially of the mail server, I would like to temporarily drop all the incoming traffic except the port 22. So, I don't risk to lose incoming mails if I need to move the mail server to another server, or something like that.

Using shorewall, how I could do that?

I was thinking to create a rules file to divert all the traffic to a non-existant internal ip and switch it with the normal file when needed.

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