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Re: IP masquerading and ADSL
- To: Haim Gelfenbeyn <rnews(at-nospam)hageltech.com>
- Subject: Re: IP masquerading and ADSL
- From: Eran Tromer <eran(at-nospam)tromer.org>
- Date: Sun, 04 Feb 2001 23:43:53 +0300
- CC: linux-il <linux-il(at-nospam)linux.org.il>
- Delivered-To: linux.org.il-linux-il@linux.org.il
- References: <ALEKLLALJPJNOIBGNHAAEENLCAAA.rnews@hageltech.com>
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
Thanks! Works fine for me, once I convinced those Windows boxes to pay
attention to their MTU settings (hint -- if you create the W2K registry
entry as String instead of DWORD then W2K will silently ignore you, and
I know no easy way to get the currently used settings...).
<rant> Sheesh. Automatic MTU discovery is in yonder standards, and
besides, incorrect MTU should cause slowdown, not connection loss.
Client-side configuration for masquerading?! Pfuy! TCP/IP over GRE+PPTP
over IP over Ethernet? I wouldn't trust these guys to properly implement
the Post-it Notes Transfer Protocol! </rant>
Eran
Haim Gelfenbeyn wrote:
> ADSL is different from ISDN because ADSL uses some sort of
> PPP-over-ethernet encapsulation (in our case pptp), thus reducing the
> possible MTU. Your masquerading clients don't know about this, and
> because of it your problem happens. I had the same problem, and
> reducing the MTU to 1436 on all masq. clients solved the problem. My
> gateway is Linux running 2.4 kernel, and clients are all W2K machines.
> Please note that if you run Win2000 too, then MTU-changing tools made
> for Win9x won't work, and you have to reboot before the change takes
> effect.
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