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Cisco VPN Windows 7

Posted on 2012-03-12
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Last Modified: 2012-03-29
Hi All,

I have used the cisco VPN client for years with no problems until now.

I have machine A and machine B - both identical hardware.  I then have a Windows 7 software image loaded onto both machines.

Machine A connects to the Cisco VPN client and is working fine.  Machine B however cannot resolve ANY IP addresses using DNS.  These machines are exactly the same and have the same config.  Why would one not be able to resolve DNS?  I've checked an ipconfig of both machines and all seems in order.

Please help with this very frustrating issue!

Kind Regards

Rob
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Question by:robclarke41
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Expert Comment

by:ecaneer
ID: 37710327
Check the host file on machine B, the host file is located C:\windows\system32\drivers\etc\. Open the host file using notepad, at the bottom of the file you will see some IP addresses listed. ( See example below) If you have any lines below local host name resolution with anything other than localhost, remove those entries and save the file. Now try connecting again with the Cisco VPN. I have bolded the normal entries for this file in the example.


(Example)
# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
#      127.0.0.1       localhost
#      ::1             localhost
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by:robclarke41
ID: 37710361
Hi, these machines are exact replicas of each other so all these files will be the same.  I checked anyway and there are no additional entries.
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Expert Comment

by:ecaneer
ID: 37710381
Can you ping the secured gateway of the VPN from computer B?
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If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
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Author Comment

by:robclarke41
ID: 37710404
I can yes
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Expert Comment

by:ecaneer
ID: 37710473
Are you pinging the host name or IP?
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Author Comment

by:robclarke41
ID: 37710478
the IP
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Expert Comment

by:ecaneer
ID: 37710528
Try pinging the host name from both.
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Author Comment

by:robclarke41
ID: 37713622
Hi, I can ping host names from A not B
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Accepted Solution

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ecaneer earned 500 total points
ID: 37713993
I would reinstall the cisco VPN client on machine B. I've had the software get corrupted on new installations many times.
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