[c-nsp] GRE tunnel to FreeBSD

[Nick Kraal]

Perhaps try:

In /etc/rc.conf

# ---Tunnel Interface Configuration---
gif_interfaces="gif0"
gifconfig_gif0="<source_IP> <destination_IP>"
ifconfig_gif0="inet <IP_address>  netmask <dotted_quad>"

Then run /etc/netstart

Should be right and will keep the tunnel up after reboot.

-nick/


Tuc at T-B-O-H.NET wrote:
>> On Tue, 24 Oct 2006, Tuc at T-B-O-H.NET wrote:
>>
>> TaTBOHN> 	Wondering if anyone had experience with a GRE tunnel to a 
>> TaTBOHN> FreeBSD server. 
>> TaTBOHN> 
>> TaTBOHN> I've set it up on 2 devices on the same subnet. Would this be a problem from
>> TaTBOHN> the start? I have my FreeBSD at 192.168.3.21 and gre0 looks like :
>> TaTBOHN> 
>> TaTBOHN> gre0: flags=9051<UP,POINTOPOINT,RUNNING,LINK0,MULTICAST> mtu 1476
>> TaTBOHN>         tunnel inet 192.168.3.21 --> 192.168.3.149
>> TaTBOHN>         inet6 fe80::212:3fff:fedd:58b2%gre0 prefixlen 64 scopeid 0x7 
>> TaTBOHN>         inet 192.168.3.21 --> 192.168.3.149 netmask 0xffffffff 
>>
>> You have incorrect configuration - same ip addresses inside and outside
>> tunnel.
>>
> 	The man page was a little confusing. I saw :
> 
> EXAMPLES
>      Configuration example:
> 
>      Host X-- Host A  ----------------tunnel---------- Cisco D------Host E
>                \                                          |
>                 \                                        /
>                  +------Host B----------Host C----------+
> 
>      On host A (FreeBSD):
> 
>            route add default B
>            ifconfig greN create
>            ifconfig greN A D netmask 0xffffffff linkX up
>            ifconfig greN tunnel A D
>            route add E D
> 
>      On Host D (Cisco):
> 
>            Interface TunnelX
>             ip unnumbered D   ! e.g. address from Ethernet interface
>             tunnel source D   ! e.g. address from Ethernet interface
>             tunnel destination A
>            ip route C <some interface and mask>
>            ip route A mask C
>            ip route X mask tunnelX
> 
> 
> 	So I did :
> 
> ifconfig gre0 create
> ifconfig gre0 192.168.3.21 192.168.3.149 netmask 0xffffffff link0 up
> ifconfig gre0 tunnel 192.168.3.21 192.168.3.149
> 
> 	Should the last one be the 2 IPs I want to have the tunnel
> IPs be, like :
> 
> ifconfig gre0 10.0.1.1 10.0.1.2
> 
> 	???
> 
> 			Thanks, Tuc
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