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I have a ADSL modem (DLink 2730u) and two PCs one of which is connected to the modem on the ethernet and the other PC is connected to the same modem on wifi. Both PCs are running Debian Wheezy Linux.

I want to be able to ssh from one PC to other in this setup. Both PCs are on the same LAN with the addresses given below - 

PC1 - 192.168.1.24
PC2 - 192.168.1.56

the gateway is modem and its IP address is 192.168.1.1

Both computers can access the gateway,

But I cannot ping one PC from the other. How do I set up my modem and the PCs so as to be able to connect the PCs with each other? How do I add a path so that the PCs get connected to each other?

mntk123
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3 Answers3

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[non native English poster] Usually, in a domestic grade router/switch/AP device, the WiFi and ethernet are on two different physical interfaces. One interface for all the wired connections (WAN and LAN) and the other one for WiFi (WLAN). The first interface is divided in two vlan's, one for WAN (wired internet) and the other vlan is for the LAN (all the switch ports of your wired internal network). That second vlan should be bridged in some way with the physical interface providing WiFi. If that bridge does not exists or has been disabled in your D-Link, than you might not be able to connect wired and wireless device together, even if they belong to the same subnet.

Here is a typical router diagram (from openWrt.org). See the br0 bridge?

https://wiki.openwrt.org/_media/oldwiki/openwrtdocs/asus-internals-default.png

Check if you can find any option in the D-Link config to bridge wireless to the wired switch ports.

[edit] I just found a D-Link User Manual on the net. Verify that the option "Enable MultiAP Isolation" is not checked in the Wireless Setup page.

ripat
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If you cannot ping the machines you are probably not on the same internal network. Maybe try arp -n to show you which machines each computer can see. If the machine is not there, the problem is probably your router/routing. If possible, try resetting your router and see if that fixes the problem. Also check to make sure both computers can access the gateway.

Edit: You might try logging into your router and making sure the router sees both devices with their respective IPs. I have had a similar problem before when assigning static IPs in linux.

Silvertail
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Can you ping each host from the other one. So for example, ssh into 192.168.1.24 and ping the gateway ping 192.168.1.1, if you can ping the gateway then try pinging the other host ping 192.168.1.56. Also, are they statically IP'd or dynamically?

Ahmad
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