mailing list archives
Re: Slow and Fast IP addresses on http ?
From: "Steven M. Bellovin" <smb () research att com>
Date: Tue, 17 Jun 2003 12:39:15 -0400
In message <20030616210129.GM751 () reifa-wave karrenberg net>, Daniel Karrenberg
Check DNS of the client address affected, forward and reverse.
It might also be port 113 -- some sites try to query your tcp port 113,
and wait for a timeout if the port is firewalled. A better solution
than blocking it is to send an immediate RST.
--Steve Bellovin, http://www.research.att.com/~smb (me)
http://www.wilyhacker.com (2nd edition of "Firewalls" book)