Security Incidents mailing list archives
Re: Port 113 requests?
From: Florian Weimer <Florian.Weimer () RUS Uni-Stuttgart DE>
Date: 07 Dec 2001 18:45:35 +0100
"Slighter, Tim" <tslighter () itc nrcs usda gov> writes:
From: Chris Wilkes [mailto:cwilkes () ladro com]
In my firewall I've setup this rule to handle these requests: -p tcp --dport 113 -j REJECT --reject-with icmp-port-unreachable In short, nothing to be concerned about.
you really should try and specify that the rule "drops" instead of reject so that the potential intruder is not provided with any information about their attempted connection.
This is completely misguided advice. Following it results in substantially increased delays when delivering SMTP mail to those hosts which perform identd lookups before accepting mail. -- Florian Weimer Florian.Weimer () RUS Uni-Stuttgart DE University of Stuttgart http://cert.uni-stuttgart.de/ RUS-CERT +49-711-685-5973/fax +49-711-685-5898 ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
Current thread:
- RE: Port 113 requests?, (continued)
- RE: Port 113 requests? Slighter, Tim (Dec 06)
- RE: Port 113 requests? Ryan McDonnell (Dec 07)
- RE: Port 113 requests? Andrew Leonard (Dec 07)
- RE: Port 113 requests? Todd Suiter (Dec 07)
- Re: Port 113 requests? Helmut Springer (Dec 07)
- Re: Port 113 requests? Crist J . Clark (Dec 07)
- Re: Port 113 requests? Greg A. Woods (Dec 07)
- Re: Port 113 requests? Paul Cardon (Dec 07)
- Re: Port 113 requests? Mike Meredith (Dec 07)
- RE: Port 113 requests? Tony Gale (Dec 07)
- Re: Port 113 requests? Florian Weimer (Dec 07)
- Re: Port 113 requests? Alexander Bochmann (Dec 07)
- Re: Port 113 requests? Patrick Patterson (Dec 07)
- Re: Port 113 requests? Paul Gear (Dec 07)
- Thread "Port 113 requests?" Mario van Velzen (Dec 07)
- Re: Port 113 requests? Valdis . Kletnieks (Dec 09)
- RE: Port 113 requests? Chris Keladis (Dec 07)
- RE: Port 113 requests? Jose Nazario (Dec 07)
- RE: Port 113 requests? Steve Stearns (Dec 07)
- RE: Port 113 requests? Jose Nazario (Dec 07)
- RE: Port 113 requests? Brian Cervenka (Dec 07)
- RE: Port 113 requests? Slighter, Tim (Dec 06)