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Thread ID: 18913 2002-05-05 04:37:00 Is it possible to have a firewall after your internet connection? Guest (0) Press F1
Post ID Timestamp Content User
47198 2002-05-05 04:37:00 Can you have a firewall after the internet connection. Like your modems RJ-11 passes through to the firewall and that firewall passes the RJ-11 into the phone socket?

I have scanned my computer using <scan.sygate.com (more scanning options on the left) and it reported 2 unknown ports open on my router plus my DNS TCP/UDP port open and all of my UDP ports returning as closed.

My router also responds to ICMP Type 8 (Ping) which is another security problem I am having with it.

The router is a Dynalink ADSL Router RTA020. I have gone to the NZADSL site and asked them if they knew how to secure my router but they had no idea how to.
Guest (0)
47199 2002-05-05 05:16:00 Dear Mr Krazee,

have you checked out the NZ ADSL mailing list? It's at:

<www.unixathome.org

It's a low to medium volume e-mail list with ~20 messages per day. If you are polite and persistant you'll likely get an answer to your question there.

Are you worried about being the victim of a DOS attack chewing up your monthly quota? If so, no firewall will help you anyway, only switching off your router or closing the PPP session can prevent this. As for having a few open ports, don't sweat it, as long as they're not dangerous ones you'll be fine. Plus you can always run a sissy 'personal' firewall on your internal machine if your worried. -I shouldn't say that, but I can't resist. I know there are a whole lot of Zone Alarm supporters on this site who like a good argument. :-)

I see the DOS attack as the most dangerous type, as it requires no misconfiguration of your network for you to be a victim.
Guest (0)
47200 2002-05-05 06:20:00 OK I went to the wrong site.

And as for ZA that was the cause of my connections dropping. Some reason it was blocking my assigned DNS server even though I put it in the trusted. I have switched to Sygate now and am liking it better.
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