Date: Thu, 17 Jul 2003 21:25:11 +0100 From: "Andy Gilligan" <andy@evo6.org> To: <freebsd-net@freebsd.org> Subject: Re: MPD 3.13 PPTP server MTU problems & questions Message-ID: <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>
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----- 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
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.
I imagine you've tried setting the MTU to other values?
Best regards,
-Andy
help
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