HOWTO: Manually correct wrong routing ?

RouterOS Forwarding Protocols
1

The (cheap) ISP for one of my gateways is not very supportive regarding a routing problem, which I have:
One special site (http://vkontakte.ru) I can not reach from my gateway PC. When doing a traceroute or wget:

traceroute vkontakte.ru
traceroute to vkontakte.ru (93.186.226.130), 30 hops max, 40 byte packets
1 84.19.166.1 (84.19.166.1) 0.000 ms 0.000 ms 0.000 ms
2 te1-1.c6500c1.keyweb.de (95.169.160.37) 0.000 ms 0.000 ms 0.000 ms
3 frt-bgw0-ae2-0.rt-comm.ru (80.81.194.15) 120.002 ms 120.002 ms 112.002 ms
4 217.106.1.22 (217.106.1.22) 80.001 ms 76.001 ms 80.002 ms
5 * * *
......
26 * * *
27 * 195.161.158.226 (195.161.158.226)(N!) 88.001 ms *

wget http://vkontakte.ru
--2010-02-15 18:09:50-- http://vkontakte.ru/
Resolving vkontakte.ru... 93.186.226.4, 93.186.226.5, 93.186.226.130, ...
Connecting to vkontakte.ru|93.186.226.4|:80... failed: Connection timed out.
Connecting to vkontakte.ru|93.186.226.5|:80...

Howver, I have servers with another ISP, which do not have the problem:
traceroute vkontakte.ru
traceroute to vkontakte.ru (93.186.229.130), 30 hops max, 40 byte packets using UDP
1 85.214.1.5 (85.214.1.5) 0.325 ms 0.961 ms 1.108 ms
2 85.214.0.109 (85.214.0.109) 1.282 ms 0.661 ms 0.620 ms
3 retn.bcix.de (193.178.185.64) 0.886 ms 0.866 ms 0.909 ms
4 ae1-6.RT.POL.SPB.RU.retn.net (87.245.233.133) 66.375 ms 60.881 ms 52.932 ms
5 * * *
....
25 * * *
26 GW-VKontakte.retn.net (87.245.252.58)(N!) 77.790 ms * *

wget http://vkontakte.ru
--2010-02-15 18:12:44-- http://vkontakte.ru/
Resolving vkontakte.ru... 93.186.229.2, 93.186.229.3, 93.186.229.129, ...
Connecting to vkontakte.ru|93.186.229.2|:80... connected.

So it is a problem for this specific ISP. Is there anything I can do myself, to fix it ?

2

simply mark routing for all traffic to vkontakte.ru (see http://www.robtex.com/as/as47541.html#bgp ) via maggle and then send to your second uplink

3

Thanx for your reply.
However, on the machine having the problem with no access to vkontakte.ru, there is only one uplink :frowning:

Any other ideas ?

4

Build a VPN tunnel to another router somewhere else on a different ISP and route traffic for that block across the tunnel.

Or change to a decent ISP.

5

Any “Guru” out there who can give me a hand regarding this problem ?
The point is, I can not easily change the ISP, because in fact I have rent a root server, from which I can not reach vkontakte.ru, and the technical support of the owner of the server states, that this is not their problem, I should contact vkontakte.ru myself.
My hoster says, that my IP might be explicitly blocked by vkontakte.ru, which I doubt, BTW.

Anybody able to trace down my problem ? I would even offer putty-access to my server.