Firewall Wizards mailing list archives
Re: IPF and ECN
From: Darren Reed <darrenr () reed wattle id au>
Date: Sat, 23 Sep 2000 19:57:12 +1100 (EST)
In some email I received from Patrick Oonk, sie wrote:
Hi, My IPF firewall is barfing about packets containing ECN information (Explicit Congestion Notification, http://www.aciri.org/floyd/ecn.html). The strange thing is, that it does not log WHY, just that it blocked the packet. I have been reading the ipf docs and I see no way to pass packets containing that extra information. I think that IPF just expects the position in the packet to be zero and blocks it. I have also looked into newer versions of IPF, and found no info about the processing of ECN info. Any clues ?
The log output should tell you which filter rule is causing them to be blocked & logged. What you will find is that because TCP ECN is relatively new, IP Filter doesn't support filtering on it and thus if you say "flags S" (for example) then that means *JUST* the SYN flag. I've been looking for a canonical source of information on ECN for a while now, so thanks for the URL. I'd appreciate it if you could follow this up with me offline as I don't have any systems which support ECN at my disposal. Cheers, Darren _______________________________________________ Firewall-wizards mailing list Firewall-wizards () nfr net http://www.nfr.net/mailman/listinfo/firewall-wizards
Current thread:
- IPF and ECN Patrick Oonk (Sep 19)
- Re: IPF and ECN Darren Reed (Sep 23)
- <Possible follow-ups>
- RE: IPF and ECN Hammerle, Tye F. (Sep 20)
- Re: IPF and ECN Patrick Oonk (Sep 22)