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connecting to a computer behind NATing
Posted on 2007-12-03
hello
i have one laptop connected to a camera and a GPRS modem. this device will connect to the internet using the mobile network and it can be in any place in the street. in the control room, i have an internet connection with a static IP address. my problem is in the laptop because it does not have a static or dynamic IP address on the internet (the mobile network use NATing). now i am running a server process on the laptop and i want to connect to it from the control room. i do not know how can i reach the laptop IP address.
regards
i have one laptop connected to a camera and a GPRS modem. this device will connect to the internet using the mobile network and it can be in any place in the street. in the control room, i have an internet connection with a static IP address. my problem is in the laptop because it does not have a static or dynamic IP address on the internet (the mobile network use NATing). now i am running a server process on the laptop and i want to connect to it from the control room. i do not know how can i reach the laptop IP address.
regards
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You can't - without cooperation with ISP.
Or You can create a tunnel from Your laptop to some static-internet server.
Easiest way is ssh port forwarding http://www.ssh.com/support/documentation/online/ssh/adminguide/32/Port_Forwarding.html
Personally I use http://openvpn.net/ - I found it more stable and since it's routing based(bridge) connections can survive tunnel restart. But it's more complicated in configuration. And requires superuser priviledges on both sides.
Or You can create a tunnel from Your laptop to some static-internet server.
Easiest way is ssh port forwarding http://www.ssh.com/support/documentation/online/ssh/adminguide/32/Port_Forwarding.html
Personally I use http://openvpn.net/ - I found it more stable and since it's routing based(bridge) connections can survive tunnel restart. But it's more complicated in configuration. And requires superuser priviledges on both sides.
in my application for the client to connect to the server(laptop) to get video from the server side, it write
.DisplayRemote ServerIPAddress, True
is these sites will offer a way for doing that?
.DisplayRemote ServerIPAddress, True
is these sites will offer a way for doing that?
Can You connect with ssh to some internet server? If so, then ssh is able to forward ports.
First You creating persistent ssh connection from Your laptop to public.server with port forwarding, say
ssh -g -C -R 1222:localhost:22 public.server
now, if You connect to public.server from internet in a way
ssh -p 1222 public.server
it will forward the traffic to your laptop port 22 - ssh!
Need more clarification? Ask.
First You creating persistent ssh connection from Your laptop to public.server with port forwarding, say
ssh -g -C -R 1222:localhost:22 public.server
now, if You connect to public.server from internet in a way
ssh -p 1222 public.server
it will forward the traffic to your laptop port 22 - ssh!
Need more clarification? Ask.
yes need more clarification.
what i will write in the ServerIPAddress in the following command
.DisplayRemote ServerIPAddress, True
what i will write in the ServerIPAddress in the following command
.DisplayRemote ServerIPAddress, True
I don't know what port is beeing used in the connection, but assume 1234
from Your laptop to publicServer.domain.com
ssh -g -C -R 1234:localhost:1234 publicServer.domain.com
You could set up passwordless login here (http://www.google.com/search?hl=en&q=ssh+without+password)
then
.DisplayRemote publicServer.domain.com-Se
from Your laptop to publicServer.domain.com
ssh -g -C -R 1234:localhost:1234 publicServer.domain.com
You could set up passwordless login here (http://www.google.com/search?hl=en&q=ssh+without+password)
then
.DisplayRemote publicServer.domain.com-Se
I already explained: from You laptop.
If Your laptop runs windows use http://www.cs.uu.nl/technical/services/ssh/putty/puttyfw.html
The server have to have ssh server installed. All unixes have this by default.
Also - You have to have the public server available - the name I provided is just example.
If Your laptop runs windows use http://www.cs.uu.nl/technical/services/ssh/putty/puttyfw.html
The server have to have ssh server installed. All unixes have this by default.
Also - You have to have the public server available - the name I provided is just example.
also taking into consideration that i am trasfeering video. i.e i need a very fast one not a slow one
If You can't cooperate with Your ISP - You have to forward the traffic with third server(acts as proxy). Sorry.
If You need direct connection either ask ISP to get public IP (or port forwarding) or change ISP.
If You need direct connection either ask ISP to get public IP (or port forwarding) or change ISP.
what should i have on my PC in the control room and what should i have on the laptop?
and how can i copnfigure both computers?
and how can i copnfigure both computers?
what should i have on my PC in the control room and what should i have on the laptop?
and how can i copnfigure both computers?
and how can i copnfigure both computers?
laptop - ssh client, putty
control room(have static public ip) - ssh server, one from above mentioned.
control room(have static public ip) - ssh server, one from above mentioned.
1. what is SSH means?
2. but i will connect from the control room computer to the laptop which provide the service. who should have putty and who should have ssh server???
3. and how can i configure both of them?
2. but i will connect from the control room computer to the laptop which provide the service. who should have putty and who should have ssh server???
3. and how can i configure both of them?
1. http://en.wikipedia.org/wiki/Ssh
2. Since You can't connect to Your laptop initially, the connection have to initiated from laptop to control.
3. Those links I provided explains configuration as well.
2. Since You can't connect to Your laptop initially, the connection have to initiated from laptop to control.
3. Those links I provided explains configuration as well.
2. Since You can't connect to Your laptop initially, the connection have to initiated from laptop to control
i do not understand
i do not understand
Your laptop is behind ISP's nat. Right. You can't connect to it? Right? But You can connect from the laptop to control. Right?
The idea is simple: connect from laptop to control, and forward back-connections within the same connection. That';s wat the ssh port forwarding does.
The idea is simple: connect from laptop to control, and forward back-connections within the same connection. That';s wat the ssh port forwarding does.
?????????
it means that i can not do what i want when both computers are connected behind the NATing?
it means that i can not do what i want when both computers are connected behind the NATing?
u said:
The idea is simple: connect from laptop to control, and forward back-connections within the same connection. That';s wat the ssh port forwarding does.
ans also u said:
from Your laptop to publicServer.domain.com
ssh -g -C -R 1234:localhost:1234 publicServer.domain.com
and many others things
please tell me the final thing i can do. if the control computer has static IP address and the laptop is behind NATing and i will try to get a fixed IP address for the control room computer.
The idea is simple: connect from laptop to control, and forward back-connections within the same connection. That';s wat the ssh port forwarding does.
ans also u said:
from Your laptop to publicServer.domain.com
ssh -g -C -R 1234:localhost:1234 publicServer.domain.com
and many others things
please tell me the final thing i can do. if the control computer has static IP address and the laptop is behind NATing and i will try to get a fixed IP address for the control room computer.
You can't do it. There is technique that makes it possible for udp, but I guess You need regular statefull connection.
The idea is simple: connect from laptop to control, and forward back-connections within the same connection. That';s wat the ssh port forwarding does.
ans also u said:
from Your laptop to publicServer.domain.com
ssh -g -C -R 1234:localhost:1234 publicServer.domain.com
and many others things
please tell me the final thing i can do. if the control computer has static IP address and the laptop is behind NATing and i will try to get a fixed IP address for the control room computer.
ans also u said:
from Your laptop to publicServer.domain.com
ssh -g -C -R 1234:localhost:1234 publicServer.domain.com
and many others things
please tell me the final thing i can do. if the control computer has static IP address and the laptop is behind NATing and i will try to get a fixed IP address for the control room computer.
now i got a static ip address for the PC in the control room which is 163.121.77.1
on the laptop, after i connect to the internet using the mobile phone network, i run ipconfig, i got the following:
IP address: 10.253.18.54
subnet mask: 255.255.255.255
Defaultr gateway: 10.253.18.54
now i want to write .DisplayRemote LaptopIPAddress, True to coonect with the camera attached on it and render its video.
how can i do that??????????????????????
on the laptop, after i connect to the internet using the mobile phone network, i run ipconfig, i got the following:
IP address: 10.253.18.54
subnet mask: 255.255.255.255
Defaultr gateway: 10.253.18.54
now i want to write .DisplayRemote LaptopIPAddress, True to coonect with the camera attached on it and render its video.
how can i do that??????????????????????
install ssh server on Your control
install putty on Your laptop
use http://www.cs.uu.nl/technical/services/ssh/putty/puttyfw.html to configure putty to forward proper port
connect with putty to control
write: .DisplayRemote ControlIPAddress, True
install putty on Your laptop
use http://www.cs.uu.nl/technical/services/ssh/putty/puttyfw.html to configure putty to forward proper port
connect with putty to control
write: .DisplayRemote ControlIPAddress, True
i can not write this ".DisplayRemote ControlIPAddress, True"
i want the control to connect to the laptop not the reverse
i want the control to connect to the laptop not the reverse
the problem is not if i am like or not. i am using an ocx for video called videocapX and it only supports connection from the client(control room) to the server (laptop having the camera). what can i do?
If You read whole thread carefully You will notice, that connecting to control on forwarded port in fact makes connection to the laptop.
u said many things and as i told u i am not expert in this case.
now u have the final situation. can u tell me what can ido finally?
i install http://www.freesshd.com/index.php?ctt=download on my control room computer. and install PuTTY on the laptop. what after that?
now u have the final situation. can u tell me what can ido finally?
i install http://www.freesshd.com/index.php?ctt=download on my control room computer. and install PuTTY on the laptop. what after that?
the control static IP is:
Ethernet adapter Internet:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 217.52.249.3
Subnet Mask . . . . . . . . . . . : 255.255.255.240
Default Gateway . . . . . . . . . : 217.52.249.1
primray DNS: 62.140.73.1
secondary DNS: 62.140.73.1
what can i do exactly?
Ethernet adapter Internet:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 217.52.249.3
Subnet Mask . . . . . . . . . . . : 255.255.255.240
Default Gateway . . . . . . . . . : 217.52.249.1
primray DNS: 62.140.73.1
secondary DNS: 62.140.73.1
what can i do exactly?
Your laptop is behind ISP's nat. Right. You can't connect to it? Right? But You can connect from the laptop to control. Right?
The idea is simple: connect from laptop to control, and forward back-connections within the same connection. That';s wat the ssh port forwarding does.
how can i do that?
The idea is simple: connect from laptop to control, and forward back-connections within the same connection. That';s wat the ssh port forwarding does.
how can i do that?
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