Zen Internet Support Forum

Hi,

 

Anyone have a simple set of config/instructions on how to enable QoS on a 608WL so that PPTP VPN gets preference over other traffic??

I've tried reading the docs, but dont have a Cisco degree... :(

I've a slightly congested DSL line, and want to ensure VPN stays stable (as I can make it).

Thanks 

No-ones any advice on this ??

Hello,

(ANS) Please be aware that QOS is a total & utter waste of time & effort. Why? if you have QOS enabled it just slows stuff down as it gobbles a certain % of your connections bandwidth. The ONLY use for QOS is in large corporations like Banks were they have special QOS written or QOS aware applications, for the vast majority of ordinary domestic end users QOS should be disabled or turned off in windows system services, this tweak free's up system resources & helps improve your machines performance.

**YOU DON'T NEED QOS.

Ivan

Thanks for that answer, I appreciate the response, however IP QoS would certainly help me out here, where my "essential" services like VPN are getting it by HTTP downloads.  Nothing to do with Windows for us, its purely LAN<>Internet access.  Agreed it wont fix the solution permanently, but at times when there are peaks it will keep things running.

Hi adrianmarsh,

NOP! your wrong QOS would only get in the way of VPN connections in my opinion by significantly reducing the available bandwidth required for VPN to work.

I think you need to forget anything related to QOS your just wasting your time.  VPN's use the public internet or local LAN but virtual private networks normally use L2TP (layer two tunneling protocol), L2TP creates a secure pipe across the internet or LAN & is encrypted end to end & requires as much available bandwidth as you can give it. QOS would take up a good chunk of that bandwidth and probably result in a VPN failing to work due to a lack of bandwidth. This is my understanding of how this works.

**Same applies to PPTP (point to point tunneling protocol).

**VPN yes! but NOT with QOS.

Ivan

Hi Adrian,

Personally I think QOS is very useful if used in the correct way. You don't need vast amounts of bandwidth to keep the VPN up, an IKE key exchange is tiny. In terms of applying QoS rules to your traffic, you may not be able to prioritise internal traffic, that will depend on what stage you encrypt your traffic i.e. if its encrypted before the QoS rules are applied then the router won't be able read the packet.

What you may be able to do is apply reverse logic to this. Don't apply QoS to your internal traffic but limit the amount of bandwidth external traffic can eat up, so if you think your biggest problem is HTTP then set a maximum allowed limit on all port80 traffic.



As to how you go about doing this on a Speedtouch I'm not much help there, I only really work with Cisco and Checkpoint.

The other thing you may be able to do if you can't figure out QoS rules etc is install a cheap and cheerful ADSL line to use for HTTP. You could then set up some routes to send internal traffic to the router with the VPN and anything else over the 2nd ADSL line - thus potentially freeing up bandwidth for time sensitive applications.



Good luck

G

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