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why is isa 2004 so slow - 3.Dec.2004 5:42:00 AM

watts3000

Posts: 115
Joined: 27.Jun.2004
Status: offline

The title says it all I'm basically testing and learning isa server 2004. I put it behind a basic netgear fvs318 broad band router. My cable connection is 3meg down I normally average around 2300 to 2700 down. Well after I installed isa my speed went down to 1100 to 1400 down. I tried it with and without the proxy. I have active directory setup with my internal dns servers forwarding to my isp's dns servers. Can someone please tell me what I'm doing wrong or is this normal.

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RE: why is isa 2004 so slow - 3.Dec.2004 12:06:00 PM

tshinder

Posts: 47439
Joined: 10.Jan.2001
From: Texas
Status: offline

Hi Watts,

Do you have a network diagram? Make sure to include IP addressing information on the ISA firewall's NICs.

Also, is this true for all protocols, or just some protocols? All sites, or just some sites?

Thanks!
Tom

(in reply to watts3000)

Post #: 2

RE: why is isa 2004 so slow - 3.Dec.2004 1:44:00 PM

watts3000

Posts: 115
Joined: 27.Jun.2004
Status: offline

I don't have a network diagram but I will can draw out one in visio. I'm testing isa on a p3 1gig ahertz with 512 pc133 amd a 40 gig 7200 rpm drive. Of course the production box at work will be scsi. I have 4 nics in the box I've listed ip configuration below. As I stated above I'm not running any dns on the isa box my dns is ad integrated I'm than forwarding all non lan request to my isp's dns servers. Also as far as protocals I've only tested it on http basic web surfing no downloading. Any help with this problem would be strongly appreciated.

internal
ip= 192.168.188.0
subnet mask 255.255.255.0
default gateway= no gateway
dns= 192.168.188.5
wins= 192.168.188.5

Wan which is a netgear router in front of isa
ip= 192.168.198.2
subnet mask 255.255.255.0
default gateway this is ip address of netgear
192.168.198.1

Wireless DMZ
ip= 192.168.210.1
subnet mask 255.255.255.0
default gateway= no gateway

Standard DMZ
ip= 192.168.35.1
subnet mask 255.255.255.0
default gateway= no gateway

[ December 03, 2004, 01:47 PM: Message edited by: watts3000 ]

(in reply to watts3000)

Post #: 3

RE: why is isa 2004 so slow - 3.Dec.2004 3:42:00 PM

watts3000

Posts: 115
Joined: 27.Jun.2004
Status: offline

I spoke to our senior network admin about the prblem. He tells me that this is normal and that isa does not give you your full bandwidth. Basically if you pull 3meg down after you install isa you will most likely get half of that. He explained that it uses caching to compensate.

[ December 04, 2004, 02:07 PM: Message edited by: watts3000 ]

(in reply to watts3000)

Post #: 4