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Remote access port forwarding problem

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7 replies

by malecken

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I have a Linksys wireless router\switch which is performing NAT for our web access. This router also supports Port Forwarding.I want remote users to access a local desktop(which is using a remote access app. to be a host) via web browser, by entering NAT router's public IP address and a port number. I have set up the router to forward a particular port to a local desktop with class C private address. Port is open on local desktop(Win2K box). After entering browser info.(xx.xxx.xxx.xxx/xxxx), I get login dialog for router. Even CORRECT router admin. password doesn't work(it works locally), but I don't think I want this dialog anyway. Win2K Incoming Connections is set to let others come in via VPN or PPTP. I have spent 2 hours on phone w\Linksys trying various things, and scoured web sites looking for help. Good tips, but nothing works. HELP!!!!!!!!!

7 replies

by cg it

what appears to be happening is remote access for the router management console ["I want remote users to access a local desktop(which is using a remote access app. to be a host) via web browser, by entering NAT router's public IP address and a port number"].

The admin password not working could be a filter. Check the filters property page and see what port they have specified [usually port 8080] and whether or not Remote Management is enabled. BUT I don't think your intent is to allow remote users to be able to manage your router.

Question: Do you have the router setup as a DHCP server suppling clients with IP addresses? If so, that's 90% your problem. For port fowarding to work, LAN client connecting to the router have to have a static IP address.

Though the router will "pass through" PPTP most of the time you have to configure the TCP PPTP port 1723 and I believe GRE UDP port 47 to get what you want to work and then it's to a specific computer on the LAN [re static IP address specified in the port fowarding properties page of the linksys router].

A workaround to the problem of fowarding PPTP traffic is to put whatever computer you want remote users to access on the DMZ.

by cg it

also is the application program your using for remote access PC Anywhere?

by malecken

Thanks for response. DHCP disabled on router. Remote mgmt. turned off. Putting box on DMZ had no success. Not using PCAnywhere remote client. LAN client has static IP address. Please elaborate on Ports 1723 and 47; do I just forward them from the router to local workstation ?

by malecken

Thanks for response. DHCP disabled on router. Remote mgmt. turned off. Putting box on DMZ had no success. Not using PCAnywhere remote client. LAN client has static IP address. Please elaborate on Ports 1723 and 47; do I just forward them from the router to local workstation ?

by lenz.rudiger

Yes you need to forward those ports to your internal "Hosts".

Be CAREFULL this is very unsecure!! You open your network, virtually without any protection.

Some information for PPTP:

PPTP consists of two connections running across very different protocols. The PPTP control connection runs across TCP via port 1723 and the data runs on top of IP GRE (type 47 or UDP). Most router & firewalls don't allow IP Type configuration, therefore UDP is used. GRE-UDP packets are UDP packets with destination port 47.

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