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.
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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.
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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
[jarmo@localhost tmp]$ uname -a
Linux localhost.localdomain 3.17.8-200.fc20.x86_64 #1 SMP Thu Jan 8 23:26:57 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
[jarmo@localhost tmp]$ yum info iproute
Loaded plugins: langpacks, refresh-packagekit
Installed Packages
Name : iproute
Arch : x86_64
Version : 3.14.0
Release : 2.fc20
Jarmo