Its not your firewall, some links are broken ...
On the main bar just below the Saabscene logo, the link to saabs.info goes to a holding page.
And there are several in the drop down menu at the top right of the screen ...
saabs.info does the same as above (as you would expect)
Saab 9-3 / GM900 returns a Not found page.
Performance Saab returns a holding page.
Saab Turbo returns an address not found error
But as Admin pointed out, just saying that many of the links don't work is a bit vague. Running the website would take up quite a lot of time, and Saabscene would rely on being told that any links are broken (and which ones), so they can do something about it.
It's quite a while since I looked at any of the links in the drop down menu and I see there are a couple of new Forums for Saabs, I may take a look, but I do like this one.
Vince
(I do have a personal web site for hosting family photos and its way out of date, so I do know that running a site requires plenty of time)