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. > > ---------------------------------------------------------------------- > 1. I am unable to contact a server > > http://en.wikipedia.org/ > Browser says ERR_ADDRESS_UNREACHABLE > > 2. Name server works just fine > > [jarmo@localhost tmp]$ dig en.wikipedia.org +short > 91.198.174.192 > > 3. 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 > > 4. 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. -- If you can't laugh at yourself, others will gladly oblige. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
