In order to go further then examine some docs: commence listed here then in this article then right here and off track, go through The person web page for iptables: gentleman iptables
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krisFRkrisFR 13.6k44 gold badges3838 silver badges4242 bronze badges nine 2 Good query with wonderful answer. One more use-circumstance this is useful for is that if you need to quickly redirect each of the traffic coming to 1 service, say squid, to another ip/port in order to conduct some maintenance on unique assistance with no need to reconfigure all of the clients! Really useful!
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Why does acetylene, remaining an unsaturated hydrocarbon, burn off having a clean up blue flame when utilized for welding?
Why does acetylene, being an unsaturated hydrocarbon, burn which has a thoroughly clean blue flame when employed for welding?
Diego WoitasenDiego Woitasen 97155 silver badges1212 bronze badges 3 Furthermore, it ought to specify a protocol which includes the concept of ports, as @FalconMomot pointed out inside a comment earlier.
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By way of example if port quantities are modified by NAT on possibly host, there isn't any approach to reconstruct All those. It is usually not a given, that connection tracking will perform accurately, if the 1st packet it sees is usually a SYN-ACK instead 스포츠중계 of an ACK.
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Regardless of what, following I do a "service iptables restart" or help you save, the ports remain showing to be shut by means of telnet (from other machines on same community) and closed via port scanning software. Any feelings?
You might also try out -p all but I have never ever completed that And do not uncover a lot of support for it from the examples.
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