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On Sun, 2006-02-05 at 22:21 +0100, Erich Titl wrote: > John > > John A. Sullivan III wrote: > > Hello, all. We are seeing some bizarre behavior with our Windows > > OpenVPN clients. We are not seeing the same behavior in the Linux > > clients. Our setup is an OpenVPN gateway running openswan connecting to > > other offices via openswan. I am just now beginning to peruse the more > > obscure configuration settings and do some extensive testing but, if > > anyone knows the answer off the top of their head, it will save me many > > hours. > > > > Whenever the windows client accesses a station in one of the offices, > > i.e., across the openswan VPN, an entry for that station is added to the > > Windows routing table. Although that is surprising, it would not be too > > bad except that the MTU on the route is set to 576! > > Did you disable PMTU discovery on Windoze? The reduced MTU size could be > one of the indications. The surprising thing is, how else would the > windows client know that his OpenVPN connection is futher tunneled > through an OpenSwan connection? > > The result is > > massive packet fragmentation. > > :-) No surprise > > cheers > > Erich <snip> Hi, Erich. Good to hear from you. Quite to my shock, the problem appears to be the opposite. I'll include more details on a separate post but it appears that openvpn is returning an icmp fragmentation needed packet with a desired mtu of 0 !!!!! If I turn off PMTU-D, all works well (not that I really want to do that!) Thanks - John -- John A. Sullivan III Open Source Development Corporation +1 207-985-7880 jsullivan@xxxxxxxxxxxxxxxxxxx Financially sustainable open source development http://www.opensourcedevel.com ____________________________________________ Openvpn-users mailing list Openvpn-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/openvpn-users Warning: require_once(../../../archive_common.php) [function.require-once]: failed to open stream: No such file or directory in /home/openvpn/domains/openvpn.net/public_html/archive/openvpn-users/2006-02/msg00073.html on line 221 Fatal error: require_once() [function.require]: Failed opening required '../../../archive_common.php' (include_path='/usr/local/lib/php') in /home/openvpn/domains/openvpn.net/public_html/archive/openvpn-users/2006-02/msg00073.html on line 221 |