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Linux as a proxy server

Linux as a proxy server

Linux as a proxy server

My Linux firewall (don't laugh) has all ports disallowed by default. I hope.

SMTP is allowed through port 25. http is also allowed. I need to allow port 21 temporarily but how?

I'm running Redhat Linux 6.

RE: Linux as a proxy server

Not so sure about the firewall side of things, but if you want to test exactly what is and isn't vulnerable on the server, download SATAN. (Info from http://www.cerias.purdue.edu/coast/satan.html )

Does a nice vulnerability test against the IP address you specify (including the machine it's installed on) and presents it all in a nice, UF format that you can view in your browser.


RE: Linux as a proxy server

What firewall are you using? If its ipchains, you can add a entry like so:

ipchains -A input -j ACCEPT -p tcp -d xxx.xxx.xxx.xxx 21

Where xxx.xxx.xxx.xxx is your IP address for the interface you are wanting to connect to.

There are a lot more options you can use also if you want to get really paranoid.

IPChains is the only firewall software I know, so if its ipfwadm, hopefully someone else can help...

RE: Linux as a proxy server

It is ipchains, so that is perfect, thanks.

Andy - I had never heard of that product but I will be trying it out today. Many thanks.

RE: Linux as a proxy server

Zel, you might also want to take a look at SAINT. This is an updated checker based upon the original SATAN, and then improved some. Details at http://www.wwdsi.com/saint/

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