Guest_imported
New member
- Jan 1, 1970
- 0
A friend of mine needs help swithcing from internal IP to external so he can host an online nhl league for me. Can someone tell me how to do that?
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations Chriss Miller on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
swithcing from internal IP to external
- Thread starter Guest_imported
- Start date
- Status
- Thread starter
- #2
Guest_imported
New member
- Jan 1, 1970
- 0
If anyone can help me out I would greatly appreciate it.
- Thread starter
- #4
Guest_imported
New member
- Jan 1, 1970
- 0
My ISP is Time Warner RoadRunner Cable and my router is made by NetGear. The computer which I want to switch from the internal IP addy to external IP addy is not the host computer. Is that a problem? I have tried entering in the routers' IP address into my address bar in my browers, and that brought me to the configuration wizard. It was quite confusing for me, and was not much help. Perhaps it would be for you however. I do not know how to change my address to 'public' as you said, but I think that is exactly what I need to do. I do not know if I have a private address. and I do not know what NAT is, or how to use it, etc. Please if you could now help me out here, I'd greatly appreciate it. Thanks
NJD-
*IF* you change your PC to the public IP address, a few things happen.
1: The Netgear goes away.
2: The one workstation that now has the public address is open to the world for hacking, attacking and all the other nasties.
internet---publicIP(netgear)privateIP---LAN
The netgear will *convert* the PUblic IP into a private range of IPs so you can have more then one PC use the same address as far as the internet is concerned.
There is no reason to use the public IP moved. People run all sorts of games/application behind routers like Netgear with success. It's a matter of configuring things correctly.
The Netgear should allow static NAT maps.. in otherwords, you should be able to tell the router to allow a certain port to be passed to a certain IP address on the inside.
internet---ExternalIP/Port23(netgear)InternalIP---LAN---WS1(internetIP/23)
In this case, the netgear listens for any port 23 traffic and then forwards it to WS1. THe internet *thinks* that it's the public IP responding and is clueless that it's really a private IP behind the netgear router.
MikeS
Find me at
"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu
*IF* you change your PC to the public IP address, a few things happen.
1: The Netgear goes away.
2: The one workstation that now has the public address is open to the world for hacking, attacking and all the other nasties.
internet---publicIP(netgear)privateIP---LAN
The netgear will *convert* the PUblic IP into a private range of IPs so you can have more then one PC use the same address as far as the internet is concerned.
There is no reason to use the public IP moved. People run all sorts of games/application behind routers like Netgear with success. It's a matter of configuring things correctly.
The Netgear should allow static NAT maps.. in otherwords, you should be able to tell the router to allow a certain port to be passed to a certain IP address on the inside.
internet---ExternalIP/Port23(netgear)InternalIP---LAN---WS1(internetIP/23)
In this case, the netgear listens for any port 23 traffic and then forwards it to WS1. THe internet *thinks* that it's the public IP responding and is clueless that it's really a private IP behind the netgear router.
MikeS
Find me at
"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu
- Thread starter
- #6
Guest_imported
New member
- Jan 1, 1970
- 0
Yes, I understand most of what you just said. Thanks. But I stil have some questions. 1) I have no problem with my pc being open for hacking and what not, because I have a firewall, and also one with the router(will that be disabled?). But besides that, why would anyone want to get into my pc? I am not a bank or somethign with money, pointless. 2) You say the netgear will 'go away'. What does that mean? I will not be able to use it if I open an address to the public? 3) I know what you mean about letting one port have access to the public address, and that I don't need to fully change everything. I just need step by step instructions on how to do anything, to just allow me to host an online league. Im sorry Im being a pain, but again, anyone that can help...I greatly appreciate it. Thanks
- Thread starter
- #7
- Thread starter
- #8
Why would people hack your *nothing* system? just to be mean spirited. Some $*$* scriptkiddie with nothing better to do and the thought that trashing systems is what hacking is all about would gleefully trash your nothing system.
The netgear question is a bit complicated to explain in a short message like this but I'll try.
When you have a router and it has two interfaces on it, say inside and outside, if both interfaces are part of the same IP subnet range, it gets confused. It has a difficult time in telling which interface to send a packet out on if both interfaces are of the same subnet it needs. There is ALOT more involved but this is the basic idea. So with your two interfaces, you need two subnets. Right now, you have one subnet which is the PUBLIC IP address on the internet side and one subnet on the LAN side. If you convert the LAN side to the PUBLIC IP numbering, then the router is in the way.
This :
internet---(PUBLIC IPS)router---switch---LAN(PRIVATE IPs)
will turn into this:
internet----switch----LAN with PUBLIC IPs
What you really want to consider is this:
internet---(publicIP)router----switch---LAN(privateIP)
|
DMZ----HOST(publicIP)
This way you can protect your LAN and still offer some protection to the host (game) in the DMZ
MikeS
Find me at
"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu
The netgear question is a bit complicated to explain in a short message like this but I'll try.
When you have a router and it has two interfaces on it, say inside and outside, if both interfaces are part of the same IP subnet range, it gets confused. It has a difficult time in telling which interface to send a packet out on if both interfaces are of the same subnet it needs. There is ALOT more involved but this is the basic idea. So with your two interfaces, you need two subnets. Right now, you have one subnet which is the PUBLIC IP address on the internet side and one subnet on the LAN side. If you convert the LAN side to the PUBLIC IP numbering, then the router is in the way.
This :
internet---(PUBLIC IPS)router---switch---LAN(PRIVATE IPs)
will turn into this:
internet----switch----LAN with PUBLIC IPs
What you really want to consider is this:
internet---(publicIP)router----switch---LAN(privateIP)
|
DMZ----HOST(publicIP)
This way you can protect your LAN and still offer some protection to the host (game) in the DMZ
MikeS
Find me at
"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu
- Status
Similar threads
- Locked
- Question
- Locked
- Question