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Old 02-22-2004, 04:36 AM
JimF's Avatar
Junior Member
  
Join Date: Feb 2004
Posts: 8
Default dynamic external IP -> No QoS
I just wanted to verify this.

If you only have one external Ethernet card with a dynamic IP address you can't do QoS.

If you are in this situation you will also have NAT for the internal network. The on-line help says you can't have QoS with NAT unless you have an alias interface. But an alias interface has to have a static IP right?
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Old 02-22-2004, 03:54 PM
Wizard
  
Join Date: May 2003
Location: Brunswick, Maryland, USA
Posts: 2,665
Default Re: dynamic external IP -> No QoS
I have QOS working on my pppoe(via nic card) which uses dynamic ip adressign without issues...
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Old 02-22-2004, 07:48 PM
VelvetFog's Avatar
Wizard
  
Join Date: Dec 2003
Location: Calgary, Alberta, Canada
Posts: 1,186
Default Re: dynamic external IP -> No QoS
No, you can have QoS with a dynamic address. You can set up Qos on your External interface, no need for an alias interface either. Just remember to refrain from specifying specific network addresses in your QoS statements, since NAT is being used.

Here are my QoS definitions:

Any POP3 Any medium borrow
Any HTTP Any low borrow
Any FTP Any low borrow
Any PPTP Any high borrow
Any NTP Any high borrow
Any GRE Any high borrow
Any SMTP Any low borrow
Any DNS Any high borrow

This set of rules was created, among other things, to prevent outside downloads from my FTP server from interfering with PPTP connections.

Of the 640 kbit/sec ADSL modem upstream channel, 64 Kbits/sec was left unallocated.
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