Date: Fri, 10 Jun 2005 10:28:54 -0500 From: Chris Haulmark <chris@sigd.net> To: STST <deepcracksg@yahoo.com.sg> Cc: freebsd-questions@freebsd.org Subject: Re: Dropped fragment GRE Message-ID: <1118417334.36978.8.camel@localhost> In-Reply-To: <010501c56d8d$7168b130$36764b0a@hq.ida.gov.sg> References: <010501c56d8d$7168b130$36764b0a@hq.ida.gov.sg>
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On Fri, 2005-06-10 at 15:24 +0800, STST wrote: > Hi all, > > I am currently running ipfw from FreeBSD-5.3-RELEASE on my box. The > box passes GRE packets from the external to the internal network. We > run Microsoft RDP over PPTP through the firewall. After upgrading to > FreeBSD 5.3, we realised that the RDP connections never get initiated. > When I did a tcpdump on the internal and external interfaces of the > FW, I realised that there were fragmented GRE packets arriving at the > FW, but however, these packets do not leave the FW. I also observed > the SEQ no. in the GRE packets ingress/egress, and there were missing > GRE packets on the egress. > > My deduction was that ipfw was dropping these fragmented GRE packets, > but however, these events were shown on syslog. How do I make ipfw log > dropped/silently rejected packets? How to I prevent ipfw from dropping > these packets? GRE would need a rule. ipfw add allow gre from any to any To turn off your logging abilities, don't use log or logmount in your rule bodies. Chris Haulmark > > Appreciate all help given, > > Thank you. > > J.W. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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