IP frag need

[Dmitry A. Bondareff]

Hello hackers!

I have two office in the Internet.
And now I trying to make VPN between it.

I using mpd for it.


Client ---> (mtu=1500) FreeBSD (mtu=1024) ========== VPN over Internet
======> (mtu=1024)FreeBSD (mtu=1500)---> WindowsNT

Client trying to use mounted disk from WindowsNT

11.8.24.25 - WindowsNT
11.8.11.1 - FreeBSD

tcpdump info:
17:26:55.100097 11.8.24.25.139 > 11.8.11.1.1049: tcp 1460 (DF)
17:26:55.100175 11.8.11.1 > 11.8.24.25: icmp: 11.8.11.1 unreachable - need
to frag (mtu 1024) (DF)
17:26:57.287737 11.8.24.25.139 > 11.8.11.1.1049: tcp 1460 (DF)
17:26:57.287813 11.8.11.1 > 11.8.24.25: icmp: 11.8.11.1 unreachable - need
to frag (mtu 1024) (DF)

As you can see IP frag needed, but WindowsNT don't want to do it.

What I cat do on FreeBSD box to solve the problem ??

Dmitry.
(Sorry for my English)