North American Network Operators Group
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Re: Slow and Fast IP addresses on http ?
- From: Steven M. Bellovin
- Date: Tue Jun 17 12:58:52 2003
In message <20030616210129.GM751@reifa-wave.karrenberg.net>, Daniel Karrenberg
writes:
>
>tcp-wrapper.
>
>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)
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