ok its sett on 3333, dont wana risk anything.... lets see how it works. But thanks for explaining me the basic, how it works in general...
That's a wise choice. You're welcome.
And with mining software getting higher and higher hashrate, it's safer. Static diff ports are often a trap. What may work well with claymore v4 may not work that well with v8 (hashrate doubled).
You may consider fixed diff ports when the miner is "mature" (no 20% increase in each release

)