How to portforward safely ?

[/u/OwLPsychology]

Im using linux pop!_OS and was wondering how to do it safely

1. 
   I dont wanna spend money
   
   
2. 
   I dont wanna use a service like playit.gg or pinggy :3
   

So portforqarsing is the only option, I know its safe ans generally the only problem is people ddos attack for fun so how do i block against that ???

submitted by /u/OwLPsychology
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