gigabit switches + tomato + server + mac = headache

[kaykkay]

Here is how I wired my network.
http://img170.imageshack.us/img170/5710/clipboard01bv3.th.png (http://img170.imageshack.us/my.php?image=clipboard01bv3.png)

in the router, I have set the DMZ to 192.168.2.101 (the server)

from my mac, I am able to access 192.168.2.101:80. However, I ain't able to access kay.dyndns.org:80. I checked port 80 at canyouseeme.org, It says port 80 is open. I asked my friend to access kay.dyndns.org:80, they said they got timeout as well when I also have my mac on.

However, when I am in office, I am able to access kay.dyndns.org from the office without any problem. From what I see, when there is other device connected to the switches, the port forward will not work.

The NAT Loopback in the tomato have set to All

is there is anything I need to set?

thanks in advance

[YeOldeStonecat]

I'm guessing the loopback feature in Tomato isn't working. I've tried Tomato a couple of years ago, but don't recall a situation where I utilized loopback at that time.

[kaykkay]

btw, I have enabled jumbo frame on the server and MAC, but the router is a 100mb router, will that cause the problem?

[thiggins]

The 10/100 switch will drop jumbo frames. But since the two NICs are auto-negotiating down to 100 Mbps, they aren't trying to use jumbo frames.

[kaykkay]

The switch is a 3Com Gigabit Switch
The router is 100mb router.

[thiggins]

Sorry. No. That won't be a problem.