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Old 10-26-2007, 07:37 PM   #1
Madd the Sane
Registered: Apr 2006
Location: USA
Distribution: Ubuntu 12.04
Posts: 42

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accessing computer across networks

I have a strange set up for my network at home. Basically I have a wireless network and, in my room, a wired network. I'm using a Linksys router for the wireless access point. A better way to show it is like this:
Wireless-------------Router(Linux comp)------------hub--------mac   
    |                                                      (dhcp)
I can ping from the mac to the laptop, but not the other way around.

I've already tried to set up the routing table by adding the following:
Destination         Mask          Gateway      Metric      2*      2*
*the metric can't be changed.
I can ping the Linux computer from the laptop at, but that's the only IP address on that subnet mask that I can ping.

Any ideas?
Old 10-26-2007, 08:28 PM   #2
LQ Guru
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Do you have a firewall running on the Linux router that is blocking incoming ICMP requests perhaps?
Old 10-26-2007, 09:34 PM   #3
Madd the Sane
Registered: Apr 2006
Location: USA
Distribution: Ubuntu 12.04
Posts: 42

Original Poster
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I'll check, but it's not just ICMP pings that aren't getting through. Basically, it's only one-way communication, and that kind of confuses me
Old 10-26-2007, 10:54 PM   #4
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I once had a similar setup using the wireless on my laptop to give my desktop internet access. I had the laptop on the subnet and a subnet for the desktop and a network printer of

I don't think you need a host route on the Linux router, but you should have one route for the network and one for the network and a default route with a gateway of
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface    *        U     0      0        0 eth0    *        U     0      0        0 eth1
loopback        *            U     0      0        0 lo
default         UG    0      0        0 eth0
You might want to check if the "ip_conntrack" module is loaded. ( It might be an alias now for nf_conntrack. )
Also use as the default gateway setting on the Mac.

Last edited by jschiwal; 10-28-2007 at 11:36 AM.


network, router, routing

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