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Ubuntu GRE local ip address, wan ip of router, or ip of ubuntu server
GRE tunnel between a Cisco router and a snapgear firewallMultiple GRE NAT routerGRE Tunnel over IPsec with LoopbackConfigure static IPv6 on Ubuntuusing a gre tunnel as default routeLinux router: ping doesn't route backUnable to PPTP through NAT on Cisco 881KVM Ubuntu Guest cannot connect to the internet on bridged networkingProxmox NAT with GRE tunnel as outside interfacePacket loss in IpSec/GRE tunnel
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I have an ubuntu server behind a router that I am configuring to have a GRE tunnel to another remote device across the interwebs.
in the config, I add the line:
pre-up iptunnel add tun1 mode gre local [local ip] remote [remote ip] ttl 255
Since the ubuntu server is behind a router, should the [local ip] be the wan ip of the router? or the actual local ip of the ethernet interface i wish the tunnel to connect through?
The router the server sits behind doesn't say anywhere anything about forwarding GRE 47 to lan devices, so I just DMZ'd the server (no ideal in product, but I am just testing using GRE to allow for multicast discovery from 1 subnet to another)
Here is the full script (with local ip set as lan ip of ubuntu server)
auto tun1
iface tun1 inet static
address 10.0.33.1
netmask 255.255.255.0
pre-up iptunnel add tun1 mode gre local 192.168.33.72 remote x.x.x.x ttl 255
up ifconfig tun1 multicast pointopoint 10.0.33.2
post-down iptunnel del tun1
ubuntu router gre
edited May 16 '13 at 21:34
Zoredache
113k31233380
asked May 16 '13 at 21:26
michaelmichael
20219
add a comment |
I have an ubuntu server behind a router that I am configuring to have a GRE tunnel to another remote device across the interwebs.
in the config, I add the line:
pre-up iptunnel add tun1 mode gre local [local ip] remote [remote ip] ttl 255
Since the ubuntu server is behind a router, should the [local ip] be the wan ip of the router? or the actual local ip of the ethernet interface i wish the tunnel to connect through?
The router the server sits behind doesn't say anywhere anything about forwarding GRE 47 to lan devices, so I just DMZ'd the server (no ideal in product, but I am just testing using GRE to allow for multicast discovery from 1 subnet to another)
Here is the full script (with local ip set as lan ip of ubuntu server)
auto tun1
iface tun1 inet static
address 10.0.33.1
netmask 255.255.255.0
pre-up iptunnel add tun1 mode gre local 192.168.33.72 remote x.x.x.x ttl 255
up ifconfig tun1 multicast pointopoint 10.0.33.2
post-down iptunnel del tun1
ubuntu router gre
edited May 16 '13 at 21:34
Zoredache
113k31233380
asked May 16 '13 at 21:26
michaelmichael
20219
Just a thought, but you should probably be using ip to configure your tunnel, not iptunnel. The IP docs are better.
– Zoredache
May 16 '13 at 21:38
@Zoredache Do you have links to good tutorials using IP rather than iptunnel?
– michael
May 16 '13 at 22:02
ip should looks like it is very close to iptunnel. The difference is that iptunnel doesn't appear to have any associated man pages. But ip doesn, and see the link in my previous comment. Also see the examples in the LARTC HOWTO. lartc.org/lartc.html#LARTC.TUNNEL
– Zoredache
May 16 '13 at 22:38
Ya I read that tutorial. It doesn't answer to my main question though. Wan IP or linux box ip in the local ip field.
– michael
May 16 '13 at 22:49
Just a thought. Why not set up a couple VMs and just try it? Did you see the section of the man page that saidlocal ADDRESS set the fixed local address for tunneled packets. It must be ...?
– Zoredache
May 16 '13 at 22:54
add a comment |
I have an ubuntu server behind a router that I am configuring to have a GRE tunnel to another remote device across the interwebs.
in the config, I add the line:
pre-up iptunnel add tun1 mode gre local [local ip] remote [remote ip] ttl 255
Since the ubuntu server is behind a router, should the [local ip] be the wan ip of the router? or the actual local ip of the ethernet interface i wish the tunnel to connect through?
The router the server sits behind doesn't say anywhere anything about forwarding GRE 47 to lan devices, so I just DMZ'd the server (no ideal in product, but I am just testing using GRE to allow for multicast discovery from 1 subnet to another)
Here is the full script (with local ip set as lan ip of ubuntu server)
auto tun1
iface tun1 inet static
address 10.0.33.1
netmask 255.255.255.0
pre-up iptunnel add tun1 mode gre local 192.168.33.72 remote x.x.x.x ttl 255
up ifconfig tun1 multicast pointopoint 10.0.33.2
post-down iptunnel del tun1
ubuntu router gre
edited May 16 '13 at 21:34
Zoredache
113k31233380
asked May 16 '13 at 21:26
michaelmichael
20219
I have an ubuntu server behind a router that I am configuring to have a GRE tunnel to another remote device across the interwebs.
in the config, I add the line:
pre-up iptunnel add tun1 mode gre local [local ip] remote [remote ip] ttl 255
Since the ubuntu server is behind a router, should the [local ip] be the wan ip of the router? or the actual local ip of the ethernet interface i wish the tunnel to connect through?
The router the server sits behind doesn't say anywhere anything about forwarding GRE 47 to lan devices, so I just DMZ'd the server (no ideal in product, but I am just testing using GRE to allow for multicast discovery from 1 subnet to another)
Here is the full script (with local ip set as lan ip of ubuntu server)
auto tun1
iface tun1 inet static
address 10.0.33.1
netmask 255.255.255.0
pre-up iptunnel add tun1 mode gre local 192.168.33.72 remote x.x.x.x ttl 255
up ifconfig tun1 multicast pointopoint 10.0.33.2
post-down iptunnel del tun1
ubuntu router gre
ubuntu router gre
edited May 16 '13 at 21:34
Zoredache
113k31233380
asked May 16 '13 at 21:26
michaelmichael
20219
edited May 16 '13 at 21:34
Zoredache
113k31233380
asked May 16 '13 at 21:26
michaelmichael
20219
edited May 16 '13 at 21:34
Zoredache
113k31233380
edited May 16 '13 at 21:34
Zoredache
113k31233380
edited May 16 '13 at 21:34
Zoredache
113k31233380
113k31233380
asked May 16 '13 at 21:26
michaelmichael
20219
asked May 16 '13 at 21:26
michaelmichael
20219
asked May 16 '13 at 21:26
michaelmichael
20219
20219
Just a thought, but you should probably be using ip to configure your tunnel, not iptunnel. The IP docs are better.
– Zoredache
May 16 '13 at 21:38
@Zoredache Do you have links to good tutorials using IP rather than iptunnel?
– michael
May 16 '13 at 22:02
ip should looks like it is very close to iptunnel. The difference is that iptunnel doesn't appear to have any associated man pages. But ip doesn, and see the link in my previous comment. Also see the examples in the LARTC HOWTO. lartc.org/lartc.html#LARTC.TUNNEL
– Zoredache
May 16 '13 at 22:38
Ya I read that tutorial. It doesn't answer to my main question though. Wan IP or linux box ip in the local ip field.
– michael
May 16 '13 at 22:49
Just a thought. Why not set up a couple VMs and just try it? Did you see the section of the man page that saidlocal ADDRESS set the fixed local address for tunneled packets. It must be ...?
– Zoredache
May 16 '13 at 22:54
add a comment |
Just a thought, but you should probably be using ip to configure your tunnel, not iptunnel. The IP docs are better.
– Zoredache
May 16 '13 at 21:38
@Zoredache Do you have links to good tutorials using IP rather than iptunnel?
– michael
May 16 '13 at 22:02
ip should looks like it is very close to iptunnel. The difference is that iptunnel doesn't appear to have any associated man pages. But ip doesn, and see the link in my previous comment. Also see the examples in the LARTC HOWTO. lartc.org/lartc.html#LARTC.TUNNEL
– Zoredache
May 16 '13 at 22:38
Ya I read that tutorial. It doesn't answer to my main question though. Wan IP or linux box ip in the local ip field.
– michael
May 16 '13 at 22:49
Just a thought. Why not set up a couple VMs and just try it? Did you see the section of the man page that saidlocal ADDRESS set the fixed local address for tunneled packets. It must be ...?
– Zoredache
May 16 '13 at 22:54
Just a thought, but you should probably be using ip to configure your tunnel, not iptunnel. The IP docs are better.
– Zoredache
May 16 '13 at 21:38
Just a thought, but you should probably be using ip to configure your tunnel, not iptunnel. The IP docs are better.
– Zoredache
May 16 '13 at 21:38
@Zoredache Do you have links to good tutorials using IP rather than iptunnel?
– michael
May 16 '13 at 22:02
@Zoredache Do you have links to good tutorials using IP rather than iptunnel?
– michael
May 16 '13 at 22:02
ip should looks like it is very close to iptunnel. The difference is that iptunnel doesn't appear to have any associated man pages. But ip doesn, and see the link in my previous comment. Also see the examples in the LARTC HOWTO. lartc.org/lartc.html#LARTC.TUNNEL
– Zoredache
May 16 '13 at 22:38
ip should looks like it is very close to iptunnel. The difference is that iptunnel doesn't appear to have any associated man pages. But ip doesn, and see the link in my previous comment. Also see the examples in the LARTC HOWTO. lartc.org/lartc.html#LARTC.TUNNEL
– Zoredache
May 16 '13 at 22:38
Ya I read that tutorial. It doesn't answer to my main question though. Wan IP or linux box ip in the local ip field.
– michael
May 16 '13 at 22:49
Ya I read that tutorial. It doesn't answer to my main question though. Wan IP or linux box ip in the local ip field.
– michael
May 16 '13 at 22:49
Just a thought. Why not set up a couple VMs and just try it? Did you see the section of the man page that said
local ADDRESS set the fixed local address for tunneled packets. It must be ...?– Zoredache
May 16 '13 at 22:54
Just a thought. Why not set up a couple VMs and just try it? Did you see the section of the man page that said
local ADDRESS set the fixed local address for tunneled packets. It must be ...?– Zoredache
May 16 '13 at 22:54
add a comment |
1 Answer
1
active
oldest
votes
The IP is the IP of the server and not the IP of router.
So let say you have 1.2.3.4/24 configured on eth0, with 1.2.3.1 being the the default gw/router, then the command would be:
iptunnel add tun1 mode gre local 1.2.3.4 remote x.x.x.x ttl y
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
add a comment |
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1 Answer
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1 Answer
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votes
The IP is the IP of the server and not the IP of router.
So let say you have 1.2.3.4/24 configured on eth0, with 1.2.3.1 being the the default gw/router, then the command would be:
iptunnel add tun1 mode gre local 1.2.3.4 remote x.x.x.x ttl y
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
add a comment |
The IP is the IP of the server and not the IP of router.
So let say you have 1.2.3.4/24 configured on eth0, with 1.2.3.1 being the the default gw/router, then the command would be:
iptunnel add tun1 mode gre local 1.2.3.4 remote x.x.x.x ttl y
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
add a comment |
The IP is the IP of the server and not the IP of router.
So let say you have 1.2.3.4/24 configured on eth0, with 1.2.3.1 being the the default gw/router, then the command would be:
iptunnel add tun1 mode gre local 1.2.3.4 remote x.x.x.x ttl y
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
The IP is the IP of the server and not the IP of router.
So let say you have 1.2.3.4/24 configured on eth0, with 1.2.3.1 being the the default gw/router, then the command would be:
iptunnel add tun1 mode gre local 1.2.3.4 remote x.x.x.x ttl y
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
answered May 16 '13 at 23:44
Sandor MartonSandor Marton
1,271711
1,271711
add a comment |
add a comment |
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Just a thought, but you should probably be using ip to configure your tunnel, not iptunnel. The IP docs are better.
– Zoredache
May 16 '13 at 21:38
@Zoredache Do you have links to good tutorials using IP rather than iptunnel?
– michael
May 16 '13 at 22:02
ip should looks like it is very close to iptunnel. The difference is that iptunnel doesn't appear to have any associated man pages. But ip doesn, and see the link in my previous comment. Also see the examples in the LARTC HOWTO. lartc.org/lartc.html#LARTC.TUNNEL
– Zoredache
May 16 '13 at 22:38
Ya I read that tutorial. It doesn't answer to my main question though. Wan IP or linux box ip in the local ip field.
– michael
May 16 '13 at 22:49
Just a thought. Why not set up a couple VMs and just try it? Did you see the section of the man page that said
local ADDRESS set the fixed local address for tunneled packets. It must be ...?– Zoredache
May 16 '13 at 22:54