On 02/02/15 19:09, Jarmo Hurri wrote:
Greetings.
Something changed in our work network configuration or my Linux laptop around Christmas. I now have serious network issues.
The following happens all the time.
- I am unable to contact a server
http://en.wikipedia.org/ Browser says ERR_ADDRESS_UNREACHABLE
- Name server works just fine
[jarmo@localhost tmp]$ dig en.wikipedia.org +short 91.198.174.192
- traceroute shows issues
[jarmo@localhost tmp]$ traceroute en.wikipedia.org traceroute to en.wikipedia.org (91.198.174.192), 30 hops max, 60 byte packets 1 localhost.localdomain (172.16.43.148) 3004.217 ms !H 3004.195 ms !H 3004.187 ms !H
- The problem is solved temporarily by flushing the route cache
[jarmo@localhost tmp]$ ip ro get 91.198.174.192 91.198.174.192 via 91.198.174.192 dev em1 src 172.16.43.148 cache <redirected> [jarmo@localhost tmp]$ su -c "ip route flush cache" [jarmo@localhost tmp]$ ip ro get 91.198.174.192 91.198.174.192 via 172.16.40.1 dev em1 src 172.16.43.148 cache
Now the address works ok for a while, but then I get connection problems again quite quickly.
I have no idea whether the problem is in my laptop or in the network. I have no problems in other networks. On the other hand, Windows machine in this network work without issues.
Any ideas? I am running an up-to-date Fedora 20 with
After you clear the cache can you try
echo 0 > /proc/sys/net/ipv4/conf/all/accept_redirects
and make sure you get
cat /proc/sys/net/ipv4/conf/all/accept_source_route 0
Then see if the problem returns.