Newbie to Merlin/Scripting - SSH script query

[AsusNovice]

Thank you for any help that can be provided, I have made reasonable efforts to search for answers

Asus RT-AC86U with Merlin 386.3_2. I have used Asus routers for VPN as server and client for some time, but only recently into merlin and now scripting. Experienced C/Windows programmer, which is no doubt a hinderance getting to grips with Linux and SH scripting

This link is similar to what I am attempting - automatically create a reverse SSH tunnel from the Asus to a known point in the outside world. I have got to:

• Using Putty to login into router
• Got scripts running both manually executed, and automatically [e.g. wan-event], and decoded / acting on the $1/$2 entry parameters.
• Logging to an output file the progress of the script.
• Getting the rev SSH tunnel setup from the command line:
  

  dbclient -p xxxx -i /jffs/.ssh/asus -y -R 0.0.0.0:yyyy:localhost:zzzz user@domain.net

What I have yet to crack is getting that line to 'execute' from within the wan-event script; and when I do I'd like to be able to log any output, and keep it running after the script completes. From the thread above, and research, the clue might be in a trailing '&' and/or a leading 'nohup'? I have tried random variations, and strategically placed sleep 10s commands, but no luck. My "log" file (using >> commands) seems to ignore that line.

Any (gentle ) advice / suggestions welcome ...

AN

 

[Maverickcdn]

Some forum gurus may correct me on this but in wan-event it should be as easy as

[ "$2" = 'connected' ] && sh /jffs/scripts/mycustomscript.sh > mycustomscript.log 2>&1 &

 

[AsusNovice]

Thanks very much
That's solved some of the issues, created others.. but gives me a way ahead
AN

 

[itpp20]

4g Carrier-Grade NAT port forwarding, reverse ssh?

Hello, been reading for a long time, got 6x RT-AC68U with 384.17 No problems but an annoying issue, so lets jump in at the deep end. 4g providers are more and more going for Carrier-Grade NAT. Currently I have 4g internet via Orange and their flybox modem which still has its own IP v4 address...

www.snbforums.com

 

[AsusNovice]

Thank you again

That is exactly the issue I had partially solved, but wanted to complete and automate... Not over 4G but from behind Starlink which is also CGNat - and then VPN over the tunnel into the Asus VPN server.

Easy question - I assume on the Asus Merlin dbclient is identical to ssh? i.e. the installed ssh is dropbear's client

AN

 

[itpp20]

Easy question - I assume on the Asus Merlin dbclient is identical to ssh? i.e. the installed ssh is dropbear's client

I think so, as I only use asus/merlin with ssh as is supplied where this all works the same, I did once use DB for key generation but quickly moved that to the sshd server. In commercial use (https://www.bitvise.com/ssh-server)