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When I first try to ssh to my archlinux box (behind a linksys router), it refuses to connection. If I run nmap -P0 <ip address> then try to ssh, it works. If I leave that connection open and start another one, it works. If I close all connections and wait a while, it stops working and I have to nmap again. Note that all of this is from a remote machine, not on the same LAN or anything (from work for example).
Does anyone know what could cause this?
Thank you!
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