Date: Fri, 18 Jul 2003 11:06:49 +0200 From: Yann Nottara <yann.nottara@almonde.com> To: freebsd-net@freebsd.org Subject: Re: MPD 3.13 PPTP server MTU problems & questions Message-ID: <3F17B8A9.5000405@almonde.com> In-Reply-To: <006f01c34ca1$85ee79f0$0202000a@vx> References: <3F159A8C.9050204@almonde.com> <20030717060346.GB22535@otdel1.org><3F16D1AC.8070802@almonde.com> <000901c34c89$439bf270$0202000a@vx> <3F16E28C.10105@almonde.com> <006f01c34ca1$85ee79f0$0202000a@vx>
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Andy Gilligan wrote: > ----- Original Message ----- > From: "Yann Nottara" <yann.nottara@almonde.com> > To: <freebsd-net@freebsd.org> > Sent: Thursday, July 17, 2003 6:53 PM > Subject: Re: MPD 3.13 PPTP server MTU problems & questions > > > >>but now, what do you think of this ? >> >>ng0: flags=88d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST> mtu 1500 >> inet6 fe80::2b0:d0ff:fee1:4874%ng0 prefixlen 64 scopeid 0x7 >> inet 192.168.0.10 --> 192.168.0.200 netmask 0xffffffff >> >>and here's the part from my mpd.conf that's related to this connection : >> >>pptp0: >> new -i ng0 pptp0 pptp0 >> set iface disable on-demand >> set iface enable proxy-arp >> set iface idle 3600 >> set bundle enable multilink >> set link yes acfcomp protocomp >> set link no pap chap >> set link enable chap >> set link keep-alive 10 60 >> set link mtu 1460 <----------------- ! >> set ipcp yes vjcomp >> set ipcp ranges 192.168.0.10/32 192.168.0.200/32 >> set ipcp dns 192.168.0.10 >> set ipcp nbns 192.168.0.10 >> >>So, where's the catch ? > > > Pretty much the same config as myself, with the exeption that I have: > > set bundle enable compression > set ccp yes mppc > set ccp yes mpp-e40 > set ccp yes mpp-e128 > set ccp yes mpp-stateless Sorry, I forgot to include that part but I use it too. > I've set the MTU to 1460 - as you have, which seems to give me 1396 > when a client connects. > > So far, I've only tested this with Windows XP machines, so I'm not sure > if anything OS-specific concerning the MTU is negotiated during the > connect phase, or even if having MPPE enabled would affect it. My PPTP clients are all Windows 2000 machines. > I imagine you've tried setting the MTU to other values? Right, and it's all the same (but now I understand why after reading a post from this thread by Archie Cobbs. > Best regards, > -Andy Thanks for you help & comments. --Yann
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