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Today, I installed my new router so I can connect my other pc and my ps3. In my network, there are some other computers these are connected with each other through another router. So I have one modem with 2 routers that make up my network. Everything works fine the only problem I am having is being pinged by other computers in the network. All the computers are on the same subnet 255.255.255.0. There is no problem with my firewall or anything I tested everything.

How can I solve this?

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firewall problem....you say it isn't but it is – aking1012 Dec 1 '10 at 20:44
I tried pinging my pc which doesnt even have a firewall (archlinux) and that didn't work. I can ping computers on the same router and i can be pinged by them. – slayerIQ Dec 1 '10 at 21:27
It may help to describe your setup more precisely: IP addresses, topology (between what are there cables), router model and configuration (especially routing tables and packet filtering rules). Terminology note: 255.255.255.0 would be the netmask, a subnet is a set of IP addresses commonly written as e.g. 192.168.1.0/24 (/24 implies a netmask of 255.255.255.0). – Gilles Dec 2 '10 at 19:29
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Are ping packets reaching the system(s) in question? tcpdump 'icmp' on the host in question then ping -c 3 host from another system on the network.

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