I also confim it with sysctl -a |less


Below is a information :

net.inet.ip.forwading=1
net.inet.ip.redirect=1
net.inet.ip.sourcerate=0
net.ine6.ip.forwading=0

My guess is that the G is for the interface which has the default gateway on it's subnet.

So, to confirm IP routing....

confirm that laptop can ping openbsd.

confirm that desktop can ping openbsd

both have the appropriate openbsd addresses that live on their subnets as their default routes.

then try and ping the desktop from the laptop or vice versa.

BTW forwarding is mispelt in your postings.

Please confirm state of modem/router.

Laptop->OpenBSD option routers 192.168.2.1=cannot request timeout
Desktop->OpenBSD options routers 176.16.10.1=cannot request timeout
Ping modem(192.168.1.1) ok 1ms
Ping www.unix.com(ok) 300ms
I have to tell u honestly. Laptop <-> Desktop I have only one gateway and one laptop due to my desktop sent to repair. Perhaps i should go to my friends there to try it out. Does this very important ?
Do u came from europe cause ur reply time is almost same with me ?

Well we have got good comms to the internet from your openbsd box.

Now we want to ensure we have good connectivity to your laptop.

What state is it in? Both on same subnets, both with same netmasks and broadcast addresses, and the laptops default route should be the address of the openbsd box on this interface.

I not really understand what u say but i will post some information here in order to for us to solve this problem together.
/etc/hostname.rl1 : inet 176.16.1.2 255.240.0.0 NONE
/etc/hostname.ral0 : inet 192.168.2.2 255.255.255.0 NONE and some other options
/etc/dhcpd.conf:Wired: subnet 176.16.0.0 netmask 255.240.0.0 option routers 176.16.1.1; range 176.16.10.10 176.16.10.12;
Wireless: subnet 192.168.2.0 netmask 255.255.255.0 options routers 192.168.2.1; range 192.168.2.3 192.168.2.5;
Both laptop and desktop can get ip from openbsd 4.1. No ping openbsd <-> Laptop || Desktop.
Wired connection from desktop after get ip :
ip: 176.16.10; DHCP server: 176.16.1.2 DG:176.16.1.1
I ping 176.16.1.2 respond but 176.16.1.1 no respond.
A billion thanks for your help.

Merry Christmas to you all.

I have read an articles from techrepublic. This article mention that class C subnet which is 255.255.255.0. WHen routing, it cannot truncate it to class A or B because 24 bits is for the network address. This is stealing address. The last eight bits is for host address.
I don't know whether this is true. Therefore, i ask here.
rl0(External INterface) subnet by ISP is 255.255.255.0
rl1(INternal interface) subnet 255.240.0.0
ral0(Wireless interface) subnet 255.255.255.0
Thanks.