IPSEC VPN Tunnel Performance w/ network app

Discussion in 'Other Linksys Equipment' started by arothenberg, Apr 21, 2007.

  1. arothenberg

    arothenberg LI Guru Member

    Ok, I have read several posts about diffent performance issues, but am not 100% sure about which recommendations to follow.

    I am using a WRV200 linksys wireless router to connect two sites (Fire stations) using an IPSEC VPN tunnel. I set up the tunnel exaclt as specified in the user manual.

    The vpn connection is working great. I am able to log into the w3k domain w/o any issues and I am able to access network resources without any noticable performance decrease. My problem is with our reporting software.

    We use an application called Firehouse Software ver 7 made by ACS solutions. this application is a client side application which stores all the database files on the server located on Lan 1 side of the VPN. the software as expected works great from the Lan 1 side, but when the application is loaded and attempting to enter reports it runs very very SLOW. I was reading about MTU sizes and was trying to determine if that might improve my performance.

    I am wondering if the MTU size will improve the VPN speed (currently set to Auto on the Status window) and exactly how and where to change that setting. It there a setting strictly for the VPN MTU size or only for all packets in the Status window.

    Any help is greatly appreciated
  2. Toxic

    Toxic Administrator Staff Member

    what is your upstream speed you have with both connections to the internet and the type of connection?
  3. arothenberg

    arothenberg LI Guru Member

    I do not know the exact upload speed, but it is cable internet on both ends.
  4. pablito

    pablito Network Guru Member

    Your maximum speed will be the lowest upstream speed. So you likely can't get more than 600-800k even if you have a 10M line. One end's downstream is the other's upstream.

    If the app is truly client-server then it should still run fine. However it might be an Access like application that is much less client-server than you think. If it must chug through the whole database then it will be slow over a WAN.

    Does the app offer a web based interface or one designed for truly remote users? That would be true client-server as the data movement happens at the far end instead of traveling the WAN and processed at the client side as it appears to be doing.
  5. arothenberg

    arothenberg LI Guru Member

    yea, I also figure that the data is processed on the client side and just stored on the server side. another location I work at uses a SQL server to host the same app, but they still have some performance issues across a DSL connection, am assuming that is still has something to do with the upstream speed. I am going to see if there is any way to upgrade the upstream speed on my connection, but I fear that might not improve much.
  6. pablito

    pablito Network Guru Member

    You should talk to the vendor about suggested setup. It would seem that they assume you run it on a LAN and they have not thought about slow links. These things are done all the time such as millions of records that I deal with remotely without any performance issues. Only the query and results are sent over the WAN, it runs no slower than being at the site. In your case it is done differently.

    It doesn't hurt to also maximize your speed with optimized VPN settings. But it will never replace proper client-server. You might do a speed test over the VPN to be sure you are at least getting what is expected.
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