I am attempting to route an IPv4 /28 block through my OVH server to a server I have with Hetzner through their main public IPs. I found a guide attached below but I am unable to ping 164.132.xxx.1 externally. 164.132.xxx.1 does ping from the OVH node after.
Public IPv4 (OVH) server 1: 141.94.176.xxx
Public IPv4 server 2 (Hetzner) : 5.9.105.xxx
IP block I want to use on server 2 (OVH IP Block): 164.132.xxx.0/28
Bridge interface server2: vmbr0
What I have tried:
Run this on server 1:
ip tunnel add gre1 mode gre remote 5.9.105.xxx local 141.94.176.xxx ttl 255
ip link set gre1 up
Run this on server 2:
ip tunnel add gre1 mode gre remote 141.94.176.xxx local 5.9.105.xxx ttl 255
ip link set gre1 up
Then we need to create a route on server 1 that will route the IP traffic over the GRE tunnel
Run this on server 1:
ip route add 164.132.xxx.0/28 dev gre1
The next step is to route data from the GRE tunnel to the bridge and back.
Run this on server 2:
ip rule add from 164.132.xxx.0/28 table 666
ip route add default dev gre1 table 666
ip route add 164.132.xxx.0/28 dev vmbr0 table 666
Last thing to do is to add the a IP the to bridge. This is gonna be the gateway for you VM's!
Use the second IP of the range!
Run this on server 2:
ip addr add 164.132.xxx.1/28 dev vmbr0
OVH node:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 02:00:00:c5:bc:6f brd ff:ff:ff:ff:ff:ff
inet 141.94.176.xxx/32 brd 141.94.176.xxx scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::ff:fec5:bc6f/64 scope link
valid_lft forever preferred_lft forever
3: gre0@NONE: <NOARP> mtu 1476 qdisc noop state DOWN group default qlen 1000
link/gre 0.0.0.0 brd 0.0.0.0
4: gretap0@NONE: <BROADCAST,MULTICAST> mtu 1462 qdisc noop state DOWN group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
5: gre1@NONE: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1476 qdisc noqueue state UNKNOWN group default qlen 1000
link/gre 141.94.176.xxx peer 5.9.105.xxx
inet6 fe80::200:5efe:8d5e:b0a0/64 scope link
valid_lft forever preferred_lft forever
Hetzner node:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 50:eb:f6:22:f4:72 brd ff:ff:ff:ff:ff:ff
inet 5.9.105.xxx/27 scope global enp7s0
valid_lft forever preferred_lft forever
inet6 2a01:4f8:162:4202::2/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::52eb:f6ff:fe22:f472/64 scope link
valid_lft forever preferred_lft forever
3: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether a2:2a:09:2a:f3:36 brd ff:ff:ff:ff:ff:ff
inet 164.132.xxx.1/32 scope global vmbr0
valid_lft forever preferred_lft forever
inet6 fe80::a02a:9ff:fe2a:f336/64 scope link
valid_lft forever preferred_lft forever
4: vmbr1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether e2:b3:f0:04:70:50 brd ff:ff:ff:ff:ff:ff
5: gre0@NONE: <NOARP> mtu 1476 qdisc noop state DOWN group default qlen 1000
link/gre 0.0.0.0 brd 0.0.0.0
6: gretap0@NONE: <BROADCAST,MULTICAST> mtu 1462 qdisc noop state DOWN group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
7: erspan0@NONE: <BROADCAST,MULTICAST> mtu 1450 qdisc noop state DOWN group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
8: gre1@NONE: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1476 qdisc noqueue state UNKNOWN group default qlen 1000
link/gre 5.9.105.xxx peer 141.94.176.xxx
inet6 fe80::200:5efe:509:69cc/64 scope link
valid_lft forever preferred_lft forever
18: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UNKNOWN group default qlen 1000
link/ether ae:50:31:a7:74:60 brd ff:ff:ff:ff:ff:ff
