is your windows firewall on? you might have to open the port there too.
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If you have router+router, put first router (the one who gets internet) configure it to DMZ second router, and configure second one.
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Yea, ip of the second router.
Edit for explain: Router is a dispositive that inteconnect 2 nets. You have:
Inet -> 1º router <- 2º router -> your lan
That means each router have 2 ips, one in each side. You need to configure DMZ in 1º router to second router, the left ip of your second router.
Hope that helps :)
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Edited for more explain, you are probably writting the "right" ip of your second router.
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i can't understand that :D
We are talkinga bout 2º router? Why you have "original" and "new"?
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i rarely made that but some time you need to be in the master output/input (lan 1) to configure and you might be unable to edit a rouyter by using another router so you need to unplug from the second router and plug it in the first, once you done that and edited the first one, you need to plug it back to the second router.
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That is not neccesary if iptables are ok (should be)
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Are you trying to portforward Minecraft? Making a server?
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have you tried to bridge the 1st router to the second router?
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Double NAT won't end well if you lack the technical knowledge.
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