VPN Problem, need your help.....

From: qazmlp (qazmlp1209@rediffmail.com)
Date: 12/03/02 

From: qazmlp1209@rediffmail.com (qazmlp)
Date: 3 Dec 2002 07:31:26 -0800

I have a problem in solving VPN configuration in my office: I have
described below the entire scenario:

1.Basically I have a Standalone Win2k server (upgraded from WinNT
Server to in2k server) in a NT4 domain which I am setting up as the
VPN server.
2.Two NIC's installed - one with internal IP address (155.200.100.101)
and another with external IP address (Our ISP provides us with static
IP which is mapped to NIC2 and NIC1 is the internal LAN card (I'm
using 155.200.100.X IP scheme for our internal LAN).
3.I have Cisco2620 router with IOS 12.0 with NAT system for accessing
Internet for all the systems on the network.
4.I don't have any kind of firewall installed
5.I have TCP 1723 enabled along with IP Protocol 47 on the router (but
I'm not sure whether that is really opened or not).
6.When I connect a laptop to the ISP and try to establish VPN tunnel
with the VPN Server it stops at "Verifying username and password" and
gives Error No 721 "Remote peer is not responding".
7.Test user has diallin access both in the domain account in the NT
arena and on a local account on the win2k server.
8.I'm able to ping the VPN Server's public IP from the Remote Laptop
9.If I try to establish VPN within the LAN it is working fine (VPN
Server and client functionality's happening properly).

I'm out of ideas totally and it seems every board on the net can only
suggest enabling IP Protocol 47 as a solution, but it is enabled.

I am thinking its possibly a routing problem, probably I need to add
some kind of entry on the router to enable to allow IP pockets inside
and outside.

Currently I have following entry added to the router

ip route <my public IP> 255.255.255.255 FastEthernet0/0

access-list 102 permit gre any any

access-list 102 permit tcp any host <my public IP> eq 1723

Relevant Pages

  • RE: VPN Connection Problems
    ... Note that we are able to successfully VPN into the office. ... to browse the network, RDP to the server or even ping the server. ... > This newsgroup only focuses on SBS technical issues. ...
    (microsoft.public.windows.server.sbs)
  • RE: VPN issue on SBS2003
    ... I understand that you encountered VPN connection issue when you use VPN to ... Internet clients or VPN to external VPN Server from SBS Client computers? ... Configure E-mail and Internet Connection Wizard ... Total GRE packets sent = 1 ...
    (microsoft.public.windows.server.sbs)
  • Re: ISA2004 kills VPN outbound
    ... Extract all files to a folder on ISA server. ... Expand the server node and highlight 'Monitoring'. ... After the VPN connection was established, ... |> Since the branch office workstations can connect to the VPN server, ...
    (microsoft.public.windows.server.sbs)
  • Re: Windows 2003 VPN Default Gateway Issues
    ... on the same subnet as the server leads me to believe it was a routing ... Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net ... How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com ... the default gateway on the client is not the problem. ...
    (microsoft.public.windows.server.networking)
  • Re: Secure VPN access
    ... with it's security option for the client. ... After getting the VPN connection I check the Ip settings and found the ... point to the head ISP's DNS server. ... > Computer certificates for L2TP/IPSec VPN connections ...
    (microsoft.public.windows.server.sbs)