Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


TCP connection failed

Posted on 2006-11-25
Medium Priority
Last Modified: 2010-08-05
What is the most likely cause  of an "error 414: Failed to establish a TCP connection"  when using the Cisco VPN client version 4.0.3 ?
Question by:bednigo
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
LVL 79

Accepted Solution

lrmoore earned 1000 total points
ID: 18011557
Client being behind a nat router
Client running XP/SP2
Can you be more specific? Is this error seen on the client log, or on the server end? What is the server end? PIX, ASA or VPN3000?
What other symptoms are you seeing?

LVL 20

Assisted Solution

calvinetter earned 1000 total points
ID: 18011563
1) That client is way too old, especially if you're on Windows XP SP2.  You should be using v4.8 (v4.6 at the very least).
2) Why are you using TCP to try & establish your VPN connection? Using the default tunneling over UDP works fine, & is much better IMHO.
3) What's the VPN server box?  Cisco VPN concentrator or what?  If it's not a Cisco box, don't bother using Cisco's VPN client to connect!

LVL 20

Expert Comment

ID: 18011569
D'oh! lrmoore beat me to the punch!  ;)
LVL 20

Expert Comment

ID: 18011578
 Are you by chance using a Dell WiFi card?  There are known issues with some of these:

LVL 79

Expert Comment

ID: 18107865
Are you still working on this? Can you close out this question before the cleanup crew gets around to it?

Featured Post

Plug and play, no additional software required!

The ATEN UE3310 USB3.1 Gen1 Extender Cable allows users to extend the distance between the computer and USB devices up to 10 m (33 ft). The UE3310 is a high-quality, cost-effective solution for professional environments such as hospitals, factories and business facilities.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Sometimes, you want your microsoft VPN to route all the traffic to the remote network. Usually your employer network. This makes it possible to access all the nodes inside this remote LAN, even if they have no "public DNS" entries. To do so, you wo…
If you’re involved with your company’s wide area network (WAN), you’ve probably heard about SD-WANs. They’re the “boy wonder” of networking, ostensibly allowing companies to replace expensive MPLS lines with low-cost Internet access. But, are they …
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

721 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question