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Port forwarding - one port to many based on url
Situation:
Our office is connected to the Internet with high speed connection. Our ISP opened 5 ports for us. Their CISCO router forwards SMTP, POP3 and HTTP ports to Debian etch web/mail server in our local network. RDP and Kerio Winroute firewall VPN (port 4090) ports are forwarded to another WIn XP computer in our local network.
Problem:
We would like to use more ports. Extra block of 5 ports that our ISP forwards is too expensive. Is it possible to establish some sort of port forwarding/translation so that requests to specified port are forwarded to another port based on domain name or some other query?
Example:
ssh.ourcompany.com:4090 forwards request to 192.168.1.1:22
imap.ourcompany.com:4090 forwards request to 192.168.1.10:143
I thank you for your ingenious answers in advance :). Solutions in windows or linux are fine.
Our office is connected to the Internet with high speed connection. Our ISP opened 5 ports for us. Their CISCO router forwards SMTP, POP3 and HTTP ports to Debian etch web/mail server in our local network. RDP and Kerio Winroute firewall VPN (port 4090) ports are forwarded to another WIn XP computer in our local network.
Problem:
We would like to use more ports. Extra block of 5 ports that our ISP forwards is too expensive. Is it possible to establish some sort of port forwarding/translation so that requests to specified port are forwarded to another port based on domain name or some other query?
Example:
ssh.ourcompany.com:4090 forwards request to 192.168.1.1:22
imap.ourcompany.com:4090 forwards request to 192.168.1.10:143
I thank you for your ingenious answers in advance :). Solutions in windows or linux are fine.
RoutersNetwork ArchitectureNetwork Operations
Last Comment
SyncMaster
ASKER
I understand that domains just point to IP address. I am interested in rules that distinguish domain names in request.
ssh tunnel is a nice thing, but can I accomplish tunneling that 2222 port to two or more ports on destination host?
ssh tunnel is a nice thing, but can I accomplish tunneling that 2222 port to two or more ports on destination host?
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ASKER
Thank you for your answer.
Do you know of a way to create a windows service for putty to create and recreate the tunnel autmatically?
Also, is it possible to do in linux?
Do you know of a way to create a windows service for putty to create and recreate the tunnel autmatically?
Also, is it possible to do in linux?
I think putty has some command line options, check them out.
I don´t know of an "automatic service" way.
I don´t know of an "automatic service" way.
They are only used to translate the to IP-Adresses. Routers don´t care about domainnames in Rule-Sets.
You could just open 1 ssh port to a box and then use this ssh connection as a tunnel.
When using e.g. putty you can easily configure ssh-tunnels.
Example:
You configure a tunnel for port 2222 to 192.168.1.10:143
to connect to the imap-server on 192.168.1.10 you have to connect to localhost:2222 which is then tunnel to the imap-server.
Bad english, I know, I´m not a native speaker.......