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Port Forwarding/QoS Related?

Last response: in Networking
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April 21, 2013 12:00:44 PM

i understand if a network port is closed it is forwarded in the modem/router settings to open it.

but my question is port 80 is used for http and web traffic and if iam able to access a website (assuming iam connecting through 80) so my port and the servers' port 80 is open.
but how to check it indefinitely, i mean i have come across no of sites that check my incoming ports but when i enter 80 in it they all seem to show that it is closed.
i do not understand this.

my 2nd question is based on qos, i have read wiki pages and all general explanations,
but how do i implement in my router.
i want to implement qos on a particular application that has provided me a list of ports it requires open

i have a beetel 450tc1, i have come across many pages but want a personalised opinion on it.

another thing: does qos requires that port to be forwarded, i also did forward my port 80 using my ipv4 address but how do i correctly check that it is usable?

thanks for reading all, if you could just answer a bit of it that would be enough.
April 21, 2013 12:04:52 PM

99% of new routers do NAT and don't need any open ports. Why are messing with port 80 or need it open. What are you trying to do, just explain that.
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April 21, 2013 12:06:07 PM

getochkn said:
99% of new routers do NAT and don't need any open ports. Why are messing with port 80 or need it open. What are you trying to do, just explain that.

just need to know things, but also implement a qos on an online game.
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April 21, 2013 12:57:01 PM

Port 80 is used by the server the user side uses a random port. If you were to have your own web server at your house it would use port 80.

Port forwarding is completely independent of QoS. It is used to map the actual internet IP your router gets from the ISP to one of your internal machines. If you only have a single machine you can map all the ports with what is called a DMZ from the outside to the inside....this is not a recommended thing to do... If you would say have a FTP server and a WEB server on different internal machine you would map the ports to the corresponding internal machines

QoS have very limited value in a home environment. The only function you can truly control is the traffic going from your house to the Internet. You cannot control that traffic coming to your house...by the time your router receives it has already gone over the circuit to your house and did what ever overload it was going to do so you can't fix the problem after it has occurred. Pretty much if you are exceeding your upload bandwidth the QoS features may help you....if you were really running a web server in your house it could provide a benefit.
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April 21, 2013 1:06:17 PM

bill001g said:
Port 80 is used by the server the user side uses a random port. If you were to have your own web server at your house it would use port 80.


now if i have to open my port 80, irrespective i wanna run a web server through it how can i do that, check the attachment i tried to follow up with an article but it doest seem to work
btw you resolved one of my many doubts. thx

http://www.freeimagehosting.net/newuploads/lsth9.jpg
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April 21, 2013 1:59:15 PM

That is the correct configuration. Some ISP prevent you from using port 80. You could try another port and map it to 80 internally. You would change the first port number to something else and leave the local one at 80. You would then in your url do xxx.xxx.xxx.xxx:p ortnumber/
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April 21, 2013 2:16:52 PM

bill001g said:
That is the correct configuration. Some ISP prevent you from using port 80. You could try another port and map it to 80 internally. You would change the first port number to something else and leave the local one at 80. You would then in your url do xxx.xxx.xxx.xxx:p ortnumber/


hey i got some pretty interesting results:
i tried with 123 to both start and end port and 80 as local (both)

when i tried 192.168.1.1 it said -> 192.168.1.1:80 asks the password
when i tried 192.168.1.1:80 it said -> the same thing
192.168.1.1:123 -> it just logged me in

i tried my external ip : 120.56.222.87 -> asks the password
120.56.222.87:123 -> no data received


should that have happened?
also i have enabled DMZ to my internal ip? is it ok?
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April 21, 2013 2:19:33 PM

Firefox is restricting that IP address.. i dont know why it should?
edit: now i checked it again, the url with port 123 is not accessible with any browser nor the port is open (i use online port checker)

also now my port 80 is open (online checker) earlier it was not, thanks for your help
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April 21, 2013 3:23:18 PM

DMZ now has that IP wide open to every port. Not a good idea.
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April 22, 2013 4:27:34 AM

getochkn said:
DMZ now has that IP wide open to every port. Not a good idea.


i dint get you.. care to explain how is this all related?
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April 22, 2013 4:39:48 AM

What he means is you now have mapped every port from your outside address to your internal. It means if your machine has other ports open other than the one you intend to use those too could be attacked. It does not mean you machine will be compromised it just means it might be. These are mostly due to bugs. If you need to leave it in the DMZ use the firewall in the machine to block any ports you do not intend to use.
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April 22, 2013 5:10:35 AM

bill001g said:
What he means is you now have mapped every port from your outside address to your internal. It means if your machine has other ports open other than the one you intend to use those too could be attacked. It does not mean you machine will be compromised it just means it might be. These are mostly due to bugs. If you need to leave it in the DMZ use the firewall in the machine to block any ports you do not intend to use.


ok i understand this, but what i don't understand is how is DMZ related to any of this (wiki article didn't help) also enabling/disabling my internal ip in DMZ how does it matter in port forwarding or i any other way..

thx for your replies, i will chose your best solution as soon as my doubts/ confusion get cleared up.
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April 22, 2013 5:18:38 AM

DMZ is a brute force method of port forwarding. It says forward ALL the ports from the outside to a single inside address. It is generally used when you don't know what ports are going to be used.
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April 22, 2013 5:24:55 AM

bill001g said:
DMZ is a brute force method of port forwarding. It says forward ALL the ports from the outside to a single inside address. It is generally used when you don't know what ports are going to be used.


i wish wiki had that type of definitions, thx bill you've been a great help.. i appreciate it a lot..
now 1 more thing to go see the attachment and if you could possibly help me filling the entries so i can implement qos for that online game..





Snippet from the game site
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April 22, 2013 6:00:12 AM

What game is it? Have you tried not messing with all the port forwarding, QOS or anything and just play it? I haven't had to port forward anything in years since NAT.
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April 22, 2013 6:02:42 AM

getochkn said:
What game is it? Have you tried not messing with all the port forwarding, QOS or anything and just play it? I haven't had to port forward anything in years since NAT.


its battlefield 3, i play the game all the time without much problem.. but i am curious to to do it.. dont really care if it works.. its just a fulfillment that i will get after doing that..
thx
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April 22, 2013 6:37:04 AM

Sagar Sammy said:
getochkn said:
What game is it? Have you tried not messing with all the port forwarding, QOS or anything and just play it? I haven't had to port forward anything in years since NAT.


its battlefield 3, i play the game all the time without much problem.. but i am curious to to do it.. dont really care if it works.. its just a fulfillment that i will get after doing that..
thx



Your router, through something called NAT, or network address translation does all the port forwarding for you, when needed for the game session and then closes and stops forward when the game is done. This is a much more secure way of doing it. By you port forwarding, assigned DMZ, etc, you are leaving your PC's ports opened to the outside world, and thus, more open to being compromised or taken over by hackers. If the game runs, seriously don't mess with it. The ports are being opened automatically when needed. You don't have to do anything and the more you mess around, the more open you leave your computer.
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April 22, 2013 6:41:21 AM

getochkn said:



Your router, through something called NAT, or network address translation does all the port forwarding for you, when needed for the game session and then closes and stops forward when the game is done. This is a much more secure way of doing it. By you port forwarding, assigned DMZ, etc, you are leaving your PC's ports opened to the outside world, and thus, more open to being compromised or taken over by hackers. If the game runs, seriously don't mess with it. The ports are being opened automatically when needed. You don't have to do anything and the more you mess around, the more open you leave your computer.


i totally get what youre are saying, but now iam jumping to qos, (as qos prioritize packets to higher value) how to do that? so that my game is more optimised.. plz see my router settings for more.
thx
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April 22, 2013 6:47:47 AM

Is there anyone else using your router besides you? If not, then it's a none-issue as everything is being sent to your node on the router anyways. Even with a few people, it's never an issue. I have 7 people, about 15-20 devices connected to my router through probably 1/4 mile of cable, 6 or 7 switches, wifi, etc and never bother with QOS and can game fine in any game I play.

QOS is more of a large network thing and it's not even really needed on small commercial routers.

The only time I would use it is if I had a VOIP phone connected to my router and was getting dropped calls or problem, then I would mess with the QOS to make sure that particular device had priority over everything else.
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April 22, 2013 6:55:38 AM



i know this.. its just that i wanna do that.. the settings on qos page is making me crazy i can't understand even one of it..
i hope you understand what iam trying to do.
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