Hi All,

I recently moved house, and what was working before is no longer :-(

Previously my network setup was cable, with ethernet presentation.  No 
issues, plug in cable and off I went, configured up IPv6 tunnel, set 
endpoints etc and all was working and stable.

Now however I'm connected via ADSL.  I bought a cheap ADSL router 
(ADSL-SAR-600E, http://www.solwise.co.uk/adsl-sar600e.htm) and set that 
up to operate in `Bridge Mode', with the m0n0wall handling 
authentication over PPPoE.  This works absolutely fine, a routable IP 
address is allocated and everything works, with the exception of the 
IPv6 tunnel.

With the IPv6 tunnel, ICMP ping request & replies work as expected, and 
initiating TCP connections works as well, however after a very short 
period of time the connection fails.  I've tried the simple things, like 
dropping the MTU on the PPPoE connection to 1400.

Has anyone else seen similar issues, or have a setup like mine?  I'm 
keen to get this working, currently my solution is to simply give the 
m0n0wall a static RFC1918 address internally and have the ADSL router do 
NAT with a DMZ pass through, however once I start to do other things 
(like initiate VPN connections from within the LAN or DMZ) I'm aware I'm 
going to run into the "double nat" issues as well....

Regards,

Simon.

-- 

https://kaizo.org/simonb | @wrongun