Member Avatar for system_Broken

I made vpn connection in widows xp and opend 1723 port now i want conect with this vpn conection by other computer but not connecting plz help me what i need more to do ?

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Dani AI

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Extra guidance to complement and — troubleshooting a home-built VPN often fails at DNS, NAT and host-side settings rather than the client itself. The following focused checks and tests will help narrow the fault quickly and point to fixes that don't require major reconfiguration.

Quick checklist (run these from a remote machine, not from inside the same LAN)

  • Confirm the hostname actually resolves to the public address you expect (use nslookup or dig).
  • From a truly remote network run ping and tracert (or traceroute) against the hostname to see where the path stops.
  • Verify the XP host keeps the same LAN address (use a static IP or a DHCP reservation on the router).
  • Test reachability to the host from outside with a simple TCP/port reachability tool or a port scanner to see whether the service is visible.
  • Check the XP machine’s logs (Event Viewer) for incoming connection attempts and any error codes, and confirm the VPN user account is enabled and allowed remote access.

Small command examples

nslookup your.hostname.example
ping your.hostname.example
tracert your.hostname.example

Troubleshooting notes and practical fixes

  • Don’t rely on testing from inside your LAN using the external name — many home routers lack “NAT loopback” so that test will mislead you.
  • Confirm the ISP isn’t doing carrier-grade NAT; if the WAN address on your router is a private-range address, inbound connections won’t reach you. Ask the ISP for a public IP or use an external server.
  • If multiple remotes need simultaneous access, consider hosting the VPN on a dedicated device or service (router with VPN server, a small always-on box, or a purpose-built VPN solution) rather than a desktop OS.

Acknowledgement: ’s pointer about name resolution and ’s feedback were useful starting points — these steps add the practical checks that normally resolve most connectivity failures.

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Member Avatar for JorgeM

how are you trying to connect to this computer...over the internet? If so, are you connecting by IP or hostname? Do you know your network's public IP address?

Member Avatar for system_Broken

i am trying to conect by host name yes i knwo my ip. actulay i have 10 computer diff places i want concect with one i dont have exprerience about this ?

Member Avatar for JorgeM

Ok, start by reviewing this Microsoft article on how to setup a VPN connection on XP.
http://support.microsoft.com/kb/314076

You mentioned that you already opened port 1723. By the way you also need to open Protocol 47 (GRE).

If you want to connect by hostname, I assume that you already setup a host name on a public DNS zone, yes?

Also, you may not be aware of the VPN limitation of XP. It only allows one inbound VPN connection. If you need more, you'll have to run Windows Server.

Member Avatar for Jojo Network

Good Information, learn a lot here.

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