nanog mailing list archives
Re: Port blocking last resort in fight against virus
From: Sean Donelan <sean () donelan com>
Date: Tue, 12 Aug 2003 22:42:38 -0400 (EDT)
On Tue, 12 Aug 2003, Randy Bush wrote:
Is it just me that feels that blocking a port which is known to be used to perform billions of scans is only proper?the second, and important part of the, question is whether there are legitimate packets to that port which want to cross your border. for 135, i am not aware of any that should cross my site's border un-tunneled.
Who should determine what protocols can cross your site's border router? You or your ISP (ignoring the fact a lot of people on this list are their own ISP)? 80% or more of customers wouldn't notice if you blocked everything on their connection except HTTP/HTTPS and DNS. So why do ISPs let all the other infection laden protocols reach their customers? Fix spam - block port 25 Fix Slammer - block port 1434 Fix Blaster - block port 135 Fix KaZaA - block everything I think filters/firewalls are usefull. I believe every computer should have one. I have several. I just disagree on who should control the filters.
Current thread:
- Port blocking last resort in fight against virus Sean Donelan (Aug 12)
- Re: Port blocking last resort in fight against virus Jack Bates (Aug 12)
- Re: Port blocking last resort in fight against virus Randy Bush (Aug 12)
- Re: Port blocking last resort in fight against virus Sean Donelan (Aug 12)
- Re: Port blocking last resort in fight against virus Christopher L. Morrow (Aug 12)
- Re: Port blocking last resort in fight against virus Randy Bush (Aug 12)
- Re: Port blocking last resort in fight against virus Robert Raszuk (Aug 13)
- Re: Port blocking last resort in fight against virus Randy Bush (Aug 13)
- Re: Port blocking last resort in fight against virus Robert Raszuk (Aug 13)
- Re: Port blocking last resort in fight against virus John Kristoff (Aug 13)
- Re: Port blocking last resort in fight against virus Randy Bush (Aug 12)
- Re: Port blocking last resort in fight against virus Jack Bates (Aug 12)
- Re: Port blocking last resort in fight against virus Mans Nilsson (Aug 13)
- Re: Port blocking last resort in fight against virus Petri Helenius (Aug 13)
- Re: Port blocking last resort in fight against virus Måns Nilsson (Aug 13)
- Re: Port blocking last resort in fight against virus neal rauhauser 402-301-9555 (Aug 13)