SSH Server behind Firewall

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got a Server behing NAT / Firewall ? Need Shell access to … ?

Server behind NAT/FW

user@server$ ssh -R 1234:localhost:22 my.public.jumpbox

Access Server

ssh my.public.jumpbox

user@jumpbox$ ssh -p 1234 localhost

user@server$

and you’re in :)

sha256: a2d421e9b998a6ecc2d1764036662585199c760809bef98dd88174c8d1609fcf