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How to update, instead of flush and re-write, iptables rules

If there are specific rules that need to be updated regularly, I would put them in a separate chain, calling that chain from INPUT in an appropriate slot iptables -N mychain # Create ...
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How to update, instead of flush and re-write, iptables rules

Replacing Rules is possible. Here is an example: First you can create a rule at the top (first) position with this command : iptables -I INPUT 1 -p tcp --dport 80 -j ACCEPT Rules can be specified to ...
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UFW Masquerade and outside traffic only on specific interfaces

Between your question description and the UFW rules you've set up, it looks to me like you want to allow your WireGuard server to do these 4 things?: Forward connections between any two hosts on its ...
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