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Temporary port forward using SSH

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Pyrrhus Zaurus

Occasional Visitor
Hi,
my raspberry manages my letsencrypt certificates and is connected to my Asus router by SSH.
I want to make a script that forward the port 80 to my raspberry, then cancel this port forwarding as soon as certificates renewal is achieved

I've seen this:
How to forward ports to your devices with iptables - Asus Merlin

But what is the "reverse" commands ? i don't want to make a mistake, damage my router, or let the port 80 opened without realizing it
Thanks for your help
 

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