Active Sync 4.0 is out and i need to install SP1 on my Windows 2003 installation on my development laptop.
I’ve removed SP1 some time ago for some browsing issues ( see My OLD Journal 
) ) but i’ve noticed that it was all right using the laptop under a ADSL Router.
Tonight i’ve reinstalled SP1 and my problems are still here: i need to SOLVE them!
My network configuration is quite simple:
- The desktop is a linux only box with a dialup modem (yeah not yet adsl coverage) with MTU of 576.
- The laptop is a multi OS box, now running Windows 2003 SP1.
This is the ISSUE:
On some sites (eg: www.gmail.com) and using FTP it doesn’t browse…
Let’s open a shell with TCPDump and find…
23:25:36.596564 IP 192.168.1.254 > 192.168.1.83: icmp 556: 66.102.9.99 unreachable - need to frag (mtu 576)
ARGH! 
Let’s tweak the MTU…
# ifconfig ppp0 mtu 1500
Now it works ok!!!
But… should a router fragment the packet itself???
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