?
Solved

Windows Routing table and default gateway

Posted on 2014-02-10
4
Medium Priority
?
431 Views
Last Modified: 2014-02-10
We have installed an IPVPN network between our three offices. This will replace the existing links, that are comprised of Internet links with VPNs setup on a firewall at each office. Each office has a separate IP subnet.

The default gateway for the network is set to one of the firewalls via a system policy.

There needs to be a period when the existing links continue to be used for Internet access, while all traffic between our offices is sent via the IPVPN.

I need to understand the options that are available to me to implement. My initial thought was to create a routing table entries on all machines for each destination subnet.

I am not sure if this is the best way to implement the solution, as it would mean updating each machine and I am not sure of the order of precedence, ie, does the routing table entry override the default gateway?

We are using Hyper-V, with Windows Server 2003 guests, physical Windows Server 2008 R2 and Server 2003 machines, Windows/XP client (slowly being replaced) and Windows 7 Pro machines.

I am considering testing the changes by initially changing only one PC at each site, but I do not know how I can prove that the inter-office traffic is indeed using the IPVPN.
0
Comment
Question by:jon_kershaw
  • 2
  • 2
4 Comments
 
LVL 72

Expert Comment

by:Qlemo
ID: 39846970
The best approach is to modify the routes on each default gateway, because that is a single point for changes.
In routing tables, any entry being more specific than an other is checked first. So if you have a host route (subnet 255.255.255.255 = 1 single IP), this will always be checked prior to own network routes (subnet 255.255.255.0 or the like), and those again prior to default routes.
0
 

Author Comment

by:jon_kershaw
ID: 39848098
Thank you for the information.

The gateways at each office are Cisco routers that have been provided by the IPVPN provider. The provider has created routes to the other other routers in the router routing tables.

I believe the best way for me to implement the change will be to alter the default gateway on each of the DHCP servers and then use separate entries for browser proxy servers, pointing to the firewall devices. Would you agree?
0
 
LVL 72

Accepted Solution

by:
Qlemo earned 2000 total points
ID: 39848106
That should do.
0
 

Author Comment

by:jon_kershaw
ID: 39848118
Thanks for that, I will accept your response and close the question. Thanks again for your help.
0

Featured Post

Receive 1:1 tech help

Solve your biggest tech problems alongside global tech experts with 1:1 help.

Question has a verified solution.

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

It is a real story and is one of my scariest tech experiences. Most users think that IT experts like us know how to fix all computer problems. However, if there is a time constraint and you MUST not fail the task or you will lose your job, a simple …
A few solutions to a problem some of us have been having when trying to add Hostgator email accounts to Outlook 2016 (will probably work with Outlook 2013 as well).
The viewer will learn how to successfully create a multiboot device using the SARDU utility on Windows 7. Start the SARDU utility: Change the image directory to wherever you store your ISOs, this will prevent you from having 2 copies of an ISO wit…
The Task Scheduler is a powerful tool that is built into Windows. It allows you to schedule tasks (actions) on a recurring basis, such as hourly, daily, weekly, monthly, at log on, at startup, on idle, etc. This video Micro Tutorial is a brief intro…

571 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