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Posted on 2009-04-08
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dear sir, i hosted one of my server on remote location. the server runs sql server database. i use from my office location VPN to access the server and fetch the data using queries. but the performance is slow as u know with VPN.

On my firewall i have two internet links WAN 1 and WAN2. i thought to improve the performance of VPN i can dedicate one of the WAN link for the VPN clients who wants to access the server.

Is it an ideal way to improve the VPN performance. i mean waht i am trying to achieve here is allowing VPN clients to establish the tunnel using a specific WAN link and i stopped other users from browsing on this WAN link. i mean i am using this WAN link for the vpn clients to establish the tunnel and stopping browsing by other users on this WAN link.

Will this help me in improving VPN performance.
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Question by:shoeb_fbd
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7 Comments
 
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Expert Comment

by:wpathan
ID: 24104546
depends on the wan link utilization, what you should first check is how much the both the wan links are getting utilized, then it will be easier for us to decide if the performance will improve or not.
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Author Comment

by:shoeb_fbd
ID: 24104662
please tell me, when the tunnel is established using specific WAN link, is the bandwidth of tunnel is equivalent to bandwidth of WAN link. i mean if WAN link is of 1 Mbps then the VPN tunnel is equal to this value
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LVL 5

Expert Comment

by:wpathan
ID: 24104692
It does not have anything to do with vpn or any other data, if the available wan link is 1mbps then it is usable to you be it using vpn or any other application unless and until some bandwidth is not reserved or dedicated to any perticular application.
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Author Comment

by:shoeb_fbd
ID: 24104794
that means if i does not allow any traffic to flow on WAN link except for VPN then i can say the whole bandwidth is dedicated to VPN clinets. moreover if i increase the badnwidth to 2 Mbps or 4 Mbps then definitely the VPN performance will enhance.
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LVL 5

Expert Comment

by:wpathan
ID: 24104913
yes exactly as the bandwidth you get does not depend on the protocol it is carrying. Before increasing it however you should get an ip accounting and link utilization report from your ISP. Also if you dedicate one link for vpn then you are loosing on redundancy of links as if any one fails the other would only be carrying the vpn traffic as you would direct it to, in current scenario they are load balancing each other and hence if one fails the you will have a performance hit but would be connected.
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Expert Comment

by:Yoruba
ID: 24105043
What kind of firewall are you using and are you using encryption(ipsec) in the tunnels that will also use alot of bandwidth for processing,i assume you're using dsl connection that is prone to latency.
You can also implement some qos on the edge switch for the vpn clients to garantee the bandwidth for them.
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Accepted Solution

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shoeb_fbd earned 0 total points
ID: 24285794
VPN is not the appropriate solution for my requirement and hence we decided to go with a dedicated fiber connection to pull the data from the remote office Location.
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