Firewall Set Up-6th May 2013

Hi Reese

I just came upon this ubuntuforum thread about setting up a proper firewall. It explains the howto but most importantly the whydo. I was under the impression that if you set up iptables with "default deny" you’re ok. wrong.

Outgoing rules should be "default deny" too. After making this rule of course I should make exceptions because I won’t be able to connect to other machines. What are these exceptions?

1. dhcp
2.http and https
3.dns=53/tcp,udp
4.email (in my case email over SSL)
5.Bittorrent client

List of Ports here.

This set up adds to security in my desktop. If you have additional applications that cannot make connections. I suggest you look at /etc/services file, the List of Ports above and the ubuntuforum thread OP will likely answer your query.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s