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Under normal conditions, the VPN client works in harmony with
your operating system, your network connection with your ISP,
and any networking or communication-related software or hardware
that you have in order to create a VPN connection. However,
because of the many variations of ISPs and
communication-related programs and hardware devices, there are
situations where
the VPN client will not work properly.
Below is a list of known issues with the VPN client. This page was updated on March 4, 2003 to denote any known
issues with the VPN 3000 client for Windows and Mac OS X and the VPN 5000
client for Macintosh 8 and 9 systems. Any Windows or OS X users who still
have the VPN 5000 client should uninstall the VPN 5000 software download
and install the VPN 3000 software.
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VPN Client
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ISP(s)
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Operating System(s)
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Networking Hardware/Software
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Problem
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Solution (if any)
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VPN 3000
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Any
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Windows (all versions)
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Wireless access point or router
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When the VPN client is activated, it receives an IP address that
starts with 128.8 (a UMCP IP address) but it cannot access any UMCP or
non-UMCP websites.
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The wireless access point or router may be blocking part of
the VPN tunnel. Try the following possible remedies:
- Upgrade the firmware for your wireless access point or
router (firmware is the term for the software that operates your wireless
access point / router). Visit the website of the manufacturer of your
wireless access point or router and find the firmware for the exact make
and model of your networking hardware, then download and install it.
- If the firmware upgrade does not work, reconfigure the
VPN 3000 to use transparent tunneling over TCP port 10000. You can do
this using the following steps:
- Open the VPN client and choose the connection
entry you want to change (UMD or UMD-TunnelAll).
- Click on the Options button
and choose Properties from the menu that appears.
- Place a checkmark next to Enable
Transparent Tunneling, and choose Use IPSec over TCP
(NAT/PAT/Firewall). Then click the OK
button.
- If reconfiguring the VPN 3000 as described above did
not work, try opening the following ports in your router in order to
allow network
traffic to travel over that port in both directions over TCP (you will
need to consult your router manual on how to do this):
- TCP port 10000
- TCP port 1723
- UDP port 500
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VPN 3000
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Any
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Windows (all versions)
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Another VPN program
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The VPN 3000 client will either not install or will not work
properly because of the presence of a different VPN
program on the same computer.
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There is unfortunately no workaround to this problem: some VPN
clients will not work with each other. There is also no support for using
other VPN software with our VPN service.
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VPN 3000
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Any
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Windows (all versions)
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None
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The VPN 3000 client will connect and will work for several
minutes and then drop the connection.
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Try changing the ForceKeepAlives value in the VPN settings file
to 1 in order to force the VPN client to
keep the session alive.
To do this, open up Notepad on your computer. Click on
File
and then Open, then browse to where the VPN profiles are
kept (by default, they would be in C:\Program Files\Cisco Systems\VPN
Client\profiles). In order
to see the two different profiles, you will have to change the File Type
Notepad is looking for from .txt to All.
Once you see the UMD-TunnelAll.pcf file, open it in Notepad. Go down near
the bottom of the settings list and change the
ForceKeepAlives setting
from 0 to 1. Then save the file. In some versions of Windows, Notepad will
automatically try to save any file it edits to a .txt file, so you might
want to browse to the profiles directory to make sure you didn't end up
creating a "UMD-TunnelAll.txt" file.
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