Messages

1

21.7 Legacy Series / IPv6 NAT driving me nuts

« on: April 06, 2022, 08:41:37 pm »

Hi,

I am behind a cable router, which is not handing me down prefixes - so my opensense needs to NAT the IPv6 - this is possible - and I know, not the optimal solution, but please no discussion about that
I was looking already in several documentations - and hence I upgraded the opensense I am really thinking of reinstalling with a fresh install, because its driving me crazy, because I had success but only for a short time.
I am doing something wrong - or misconfigured something

Here are the details:
Cable Router - Opensense - WLAN ROUTER - CLIENTS

System is on 21.7.8 - I have enabled DHCPv6 and also in the Services Router Advertisments Asssisted - so its is doing SLAAC.
Behind opensense is an ddwrt wifi router - configured with radv - nothing else, FW disabled
The linux and the windows system get an IPv6 address from opensense, also a lease and know their DNS server now.
from those systems I can ping each other and also the opensense (!)
but although the Firewall OUTBOUND NAT is configured with my source adresses (like (fd42:4242:4242:4242:ffff:ffff:ffff:8 and WAN address) its not going out:

on windows:
tracert -6 google.com

Tracing route to google.com [2a00:1450:4016:809::200e]
over a maximum of 30 hops:

  1     *        *        1 ms  OPNsense.localdomain [fd42:4242:4242:4242::]
  2     *        *        *     Request timed out.


From opensense shell - I can ping google successfull.
In the FW:
LAN: LAN TO ANY - all traffic IPv6 allowed
WAN:
WAN TO ANY -  TCP/IP V6 allowed
WAN TO ANY -  ICMP V6 allowed

thanks
jon

funfact: I played around with restarting the DHCP and also configured the WLAN router with DDWRT and I had some successes, but there are not reproducible. So really some assistance would be very apricated.

2

General Discussion / Re: same subnet / strange connection loss ssh

« on: February 28, 2018, 07:49:37 pm »

Hi Franco!

thank you! i thought about that. And as you explained, I did this - there is still a switch between the FW and the rest - BUT: I am using a virtual IP as the default GW in the same network. could that be the problem? Or a bridge i put over the WAN?

best regards
jonathan

3

General Discussion / same subnet / strange connection loss ssh

« on: February 27, 2018, 07:43:22 am »

Hi!

I am new to opnsense, it is a great product.
I recently noticed, that running ssh on the same subnet brings me to connection interruption with ssh -
I changed allready Firewall Optimization to conservative, in FW -> Settings -> Advanced
regarding to this post
https://servernetworktech.com/2013/05/pfsense-vlans-and-ssh-disconnects/
and it is better working!
Today also in Settings -> Normalization
 IP Do-Not-Fragment   
and now testing again)

Does anybody has another hint, to improove this issue?
thank you
rasp