Port Forwarding

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Re: Port Forwarding

Postby aspnair » 2009-10-05 14:33

The real way to find it, is trying it from outside. I noticed that using your internet pubic ip address from inside is not that reliable.
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Re: Port Forwarding

Postby jen140 » 2009-10-06 17:02

It was tested from outside usin nmap-online.com service, and its stills says thats its filtered.
THe problem is still not solved, arent there any pro linux admins out here?
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Re: Port Forwarding

Postby aspnair » 2009-10-08 07:25

Are you sure that your ISP is not blocking any port themselves. Many ISP's block ftp/ssh/http etc. ports.
Just to make sure that this is not the case, do the following

* clear all ip tables rules on your server.
* run any of ftp/ssh/http server on your server, not on your private lan machine, no port forwarding etc...
* ask your friend to connect to it.

If you dont want to run any server you could use netcat also. with any port, for example port 5500
nc -l -p 5500

Ask your friend to do
telnet <your public ip> 5500
or
http://<your public ip>:5500

If it is working try to repeat the same for 22(ssh) or 80(http) to make sure that they are working.
If they are not working, there is nothing you could do
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Re: Port Forwarding

Postby jen140 » 2009-10-08 20:13

No, my isp doenst block any ports, and it was tested before installing linux on windows system, and i could easily host any service.
But to be shure, i've used the netcat like next:
netcat -vv -l -p21
And scanned the host with nmap-online.com, and it reports that port is opened.
So the problem hides somewhere in the system.
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Re: Port Forwarding

Postby jen140 » 2009-10-11 23:00

Thanks every one for your time and help.
I've got it solved at http://www.daniweb.com/forums/thread229187.html
The problem was on the side of the virtual machine.
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