Weird network problem with ubuntu only
I am running out of ideas here.
I run small home server using ubuntu and dnsmasq.
Everything worked fine until few days ago, when I noticed I am unable to ssh/ping other ubuntu machine on my private lan.
- all clients have correct static or dynamic address delivered using DHCP
- all DNS requests are resolved properly, returning IPv4 addresses as expected
- all network clients are able to access internet
- all network clients are able to access the server
- all non-ubuntu network clients can be pinged, accessed using ssh/http and so on (openWRT, debian)
- ubuntu clients cannot access other ubuntu clients with the exception of the server
- server IP 192.168.1.1, client1 IP 192.168.1.2 (ubuntu), client2 IP 192.168.1.3 (ubuntu), client3 192.168.1.4(openwrt)
- on server, ping client1 works fine, ping client2 works fine
- on client1, ping 192.168.1.1 works fine, ping 192.168.1.3 ends up with "destination host unreachable"
- on client2, ping 192.168.1.2 ends up with "destination host unreachable"
- on client1, ping 192.168.1.4 works fine
- on client3, ping 192.168.1.2 or 192.168.1.3 works fine
I thought it has something to do with IPv6, but disabling it did not help.
Also, I am trying to ping/ssh using IPv4 address and hostname with no success here.
Please, advice what should I look into next.
Last edited by rklauco; November 17th, 2012 at 08:15 AM.
Reason: highlighting the problem
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