Guys,
please I have no luck with this. I have 2 ISPS. I have working configuration with ip route a 2 routing tables in a way, that matching local subnet uses second provider while all the others are using the first one - main.
The main problem I am having is, that I am unable to reach my router via public ip address of that second ISP.
This is my default routing table
[root@sx1 cron.hourly]# ip route show table main 194.228.196.39 dev ppp0 proto kernel scope link src 90.178.76.117 10.123.50.101 dev ppp2 proto kernel scope link src 10.123.50.1 10.123.50.100 dev ppp1 proto kernel scope link src 10.123.50.1 213.194.242.0/24 dev eth1 proto kernel scope link src 213.194.242.198 10.123.20.0/24 dev eth0 proto kernel scope link src 10.123.20.1 10.123.10.0/24 dev eth0 proto kernel scope link src 10.123.10.11 10.123.11.0/24 dev eth0.8 proto kernel scope link src 10.123.11.1 10.123.42.0/24 dev eth0.5 proto kernel scope link src 10.123.42.1 10.123.123.0/24 dev eth0.7 proto kernel scope link src 10.123.123.1 10.123.40.0/24 dev eth0.4 proto kernel scope link src 10.123.40.1 10.123.30.0/24 dev eth0 proto kernel scope link src 10.123.30.1 10.123.44.0/24 dev eth0.6 proto kernel scope link src 10.123.44.1 169.254.0.0/16 dev eth0.8 scope link default via 213.194.242.1 dev eth1
As you can see , my default provider has gateway 213.192.252.1 , connected via eth1 . This works fine for me.
Second configuration is ip rule based, when subnet 10.123.123.0/24 goes to routing table adsl
[root@sx1 cron.hourly]# ip rule show 0: from all lookup 255 32764: from all fwmark 0x1 lookup adsl-vpn 32765: from 10.123.123.0/24 lookup adsl 32766: from all lookup main 32767: from all lookup default
[root@sx1 cron.hourly]# ip route show table adsl 194.228.196.39 dev ppp0 scope link src 90.178.76.117 10.123.123.0/24 dev eth0.7 scope link src 10.123.123.1 default via 194.228.196.39 dev ppp0
As you can see in this case, all trafic goes via ppp0 (my second internet provider connected via ppp0 - adsl ppoe).
This works fine.
What I want to achieve is, now being able to ping /access/whatever to my server via second public IP address of my adsl provider (90.178.76.117). To achieve this i have added iptables rule, which marks all packets comming via ppp0 (iptables -t mangle -A PREROUTING -i ppp0 -j MARK --set-mark 0x1).
And created another routing table named adsl-vpn
[root@sx1 cron.hourly]# ip route show table adsl-vpn 194.228.196.39 dev ppp0 scope link src 90.178.76.117 10.123.10.0/24 dev eth0 scope link src 10.123.10.11 default via 194.228.196.39 dev ppp0
Now i have added ip rule, which for all packets marked as 1 , which are the ones which came trough ppp0 = my second ISP, uses table adsl-vpn
[root@sx1 cron.hourly]# ip rule show 0: from all lookup 255 32764: from all fwmark 0x1 lookup adsl-vpn <--- this one 32765: from 10.123.123.0/24 lookup adsl 32766: from all lookup main 32767: from all lookup default
Well, now I should be able definitely to ping my server from outside, but it does not works
Pinging from windows machine in outside world :
C:\Users\boss>ping 90.178.76.117 Pinging 90.178.76.117 with 32 bytes of data: Request timed out. Request timed out. Request timed out. Ping statistics for 90.178.76.117: Packets: Sent = 3, Received = 0, Lost = 3 (100% loss),
If i will tcpdump my ppp0 interface on my router I see the ICMP echo requests are comming
[root@sx1 cron.hourly]# tcpdump -i ppp0 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on ppp0, link-type LINUX_SLL (Linux cooked), capture size 96 bytes 09:08:27.743789 IP adsl-dyn118.78-98-105.t-com.sk > gw2.cz.polarion.com: ICMP echo request, id 1, seq 72, length 40
But, echo responses from my server NOT, instead of that, responses are comming out of eth1 interface , which is my first ISP!
[root@sx1 cron.hourly]# tcpdump -i eth1 |grep ICMP tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth1, link-type EN10MB (Ethernet), capture size 96 bytes 09:09:30.451706 IP gw2.cz.polarion.com > adsl-dyn118.78-98-105.t-com.sk: ICMP echo reply, id 1, seq 73, length 40 09:09:35.409704 IP gw2.cz.polarion.com > adsl-dyn118.78-98-105.t-com.sk: ICMP echo reply, id 1, seq 74, length 40
This means that either mange is not working or ip rule is not working .
Please help, David