Hi,

Does anyone have any recommendations on how to scan or test my Linode firewall's setup?

I'd like to be certain that what I think is open and closed is actually what's deployed.

Thanks!

From outside:

nmap -v -A your.server

From inside:

netstat -ntulp

Iptables -L will list your current firewall rules. Or ufw status if you are on Ubuntu using that.

There's a nice gui for nmap at http://nmap.org/zenmap/ which is cross platform.

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Thanks for the suggestions. Those worked great!

Was looking for the same information.
Thanks a lot for the answers!