Solved

VPN clients not able to resolve DNS names of local objects

Posted on 2014-01-19
7
513 Views
Last Modified: 2014-02-04
Hi Team

We have an issue on a client site where users could VPN to the local server but would not be able to gain access to resources.

The IP addresses given to users were in the 169.x.x.x range so that it appeared that RAS cannot pulled addresses from the DHCP range. We resolved this issue by creating a static address pull for the VPN users to access.

Now the users can login and access resources but only if they are accessed using IP values rather than local hostnames.

Looking for direction on now to enable users to access with hostname ?

Thanks
0
Comment
Question by:optimus_nz
7 Comments
 
LVL 8

Expert Comment

by:piyushranusri
ID: 39793354
VPN clients will not be able to resolve DNS host names on the internal network if they are not assigned a DNS server address by the ISA Server firewall/VPN server. In most cases, the VPN client already has a DNS server address assigned to it. However, that DNS server address does not resolve names on the corporate network because that DNS server is intended to resolve names on the network the VPN client computer is attached to before connecting to the ISA firewall/VPN server, or to resolve only Internet host names.
what is vpn server version ??

didi you review RAS configuration ?

The Routing and Remote Access service is configured to permit incoming connections.

did this happen suddenly or from starting its like that ?

hope tthis link will assist you to understand the cause..


please share the output
0
 
LVL 11

Expert Comment

by:Manjunath Sullad
ID: 39793909
Try adding DNS suffix at client side.

On Local Area Network Icon, Properties,click Internet Protocol Version 4 (TCP/IPv4), click Properties.

Click Advanced, and then click the DNS tab.

Specify the DNS suffix for the connection, Ok.

Now try connecting VPN and check.

Refer below URL for further troubleshooting, based on error messages.

http://technet.microsoft.com/en-us/library/cc772616(WS.10).aspx#BKMK_5
0
 
LVL 16

Expert Comment

by:vivigatt
ID: 39795437
If your VPN clients needs to be able to connect to local devices, they must "know" local name servers (DNS and potentially WINS).
This would be easier if the IP config was set by DHCP, but I think I remember that you can set it even with a "static" pool.
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 

Author Comment

by:optimus_nz
ID: 39801946
Hey Guys

The server is Windows server 2008, no ISA but there is a Mako modem/firewall which is the outbound connection for the site.

I have gone through and checked the settings for another site that has exactly the same setup (static IP pool for VPN and same model modem/firewall) and it is able to resolve hostnames local

Help ?
0
 
LVL 16

Expert Comment

by:vivigatt
ID: 39805433
HAve you checked DNS and WINS settings ?
0
 

Accepted Solution

by:
optimus_nz earned 0 total points
ID: 39822230
Hi Team

We were not able to resolve in a timely fashion so we change the login scripts to reference IP rather than hostname for drive mappings.

We were not able to identify the cause but the VPN was not able to provide DHCP address to users so assume this is somehow related to users not being able to resolve DNS/Hostname either?

In anycase we would like to close the ticket
0
 

Author Closing Comment

by:optimus_nz
ID: 39832006
Nothing suggested was able to resolve the issue. Would like to close thread
0

Featured Post

Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

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

I'm a big fan of Windows' offline folder caching and have used it on my laptops for over a decade.  One thing I don't like about it, however, is how difficult Microsoft has made it for the cache to be moved out of the Windows folder.  Here's how to …
You might have come across a situation when you have Exchange 2013 server in two different sites (Production and DR). After adding the Database copy in ECP console it displays Database copy status unknown for the DR exchange server. Issue is strange…
This tutorial will walk an individual through the steps necessary to configure their installation of BackupExec 2012 to use network shared disk space. Verify that the path to the shared storage is valid and that data can be written to that location:…
This tutorial will walk an individual through the steps necessary to install and configure the Windows Server Backup Utility. Directly connect an external storage device such as a USB drive, or CD\DVD burner: If the device is a USB drive, ensure i…

948 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

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now