Route configuration in network-manager.

[pnunn]

Hi Guys,

I've got an odd one for you.

I am having issues ssh'ing to one site in particular. For some reason when I try and ssh the traffic is getting hijacked or something

If I ping the site, the pings work fine, if I traceroute the site I get one hop?? If I do the same thing on a winblows box in a vm on the same machine I get 9 hops and I can ssh in (using cygwin).

 traceroute eocu.marks-clerk.com.au  
traceroute to eocu.marks-clerk.com.au (115.70.162.106), 30 hops max, 60 byte packets
 1  106.162.70.115.static.exetel.com.au (115.70.162.106)  0.050 ms  0.018 ms  0.015 ms

netstat -rn does show one dodgy looking route

netstat -nr
Kernel IP routing table
Destination * * Gateway * * * * Genmask * * * * Flags * MSS Window *irtt Iface
0.0.0.0 * * * * 192.168.0.1 * * 0.0.0.0 * * * * UG * * * *0 0 * * * * *0 eth0
115.70.162.104 *0.0.0.0 * * * * 255.255.255.252 U * * * * 0 0 * * * * *0 eth0
169.254.0.0 * * 0.0.0.0 * * * * 255.255.0.0 * * U * * * * 0 0 * * * * *0 eth0
192.168.0.0 * * 0.0.0.0 * * * * 255.255.255.0 * U * * * * 0 0 * * * * *0 eth0
192.168.122.0 * 0.0.0.0 * * * * 255.255.255.0 * U * * * * 0 0 * * * * *0 virbr0

I have no idea where that route is coming from (the route ends in 162.104).

I tried removing this route, but still got one hop to the host.

Any ideas where to look next? I'm out.

Ta

Peter.

[SteveRiley]

Please describe your setup a bit more. How are the routers/switches/modems in your network set up? Who is your ISP? What are the SSH errors?

I will note that the address 115.70.162.106 is in the subnet 115.70.162.104/30, so the one-hop route isn't entirely unexpected. But where the route is coming from...yeah, that's curious.

[pnunn]

Hi Steve,

I think I've just got to the bottom of this (or atleast eliminated the problem) and its tied up with IP6 some how..

I had a box on my network running a 6-4 tunnel and I think it must have been pushing out routes some how (its also my dhcp, dns server). Once I turned off the IP6 tunnelling bits, the route vanished and ssh started working.

Not sure what the interaction was, but its working now.

Thanks for the message Steve, just beat me to putting a reply on here myself.

Peter.