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ISA 2006 slow uploads

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ISA 2006 slow uploads - 19.Jul.2007 5:18:51 PM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		Hello all,

Our ISA 2006 box seems to be throttling our upload bandwidth by at least 2/3.  When we bypass the ISA box, our UL/DL bandwidth is fairly symmetrical.  When we go through the box, the download speed is good, and the UL is not even close.

Any tips/ideas/things to check?

-Joe

Post #: 1
RE: ISA 2006 slow uploads - 19.Jul.2007 6:22:53 PM   
aek033

 

Posts: 31
Joined: 19.Sep.2006
Status: offline 		As strange as it may seem, try tinkering with your speed settings on your nic cards.  I had the same problem until I set my cards to 100 full rather than auto.  My setting may not work for you but I would try several and see what happens.

(in reply to digitlman)
Post #: 2
RE: ISA 2006 slow uploads - 20.Jul.2007 10:01:43 AM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		I changed both of my NICs from auto speed detect to 100MB full. However, since my "internal" side NIC is a gigabit card, and then I set it to 100MB, I did more harm than good. My download speed dropped to 1/4 of what it was, and the UL was unchanged. Needless to say, I put both NICs back to auto, and the DL ramped back up to normal, and the UL is still 1/3 of what it should be.

Any other suggestions?  I assume that when I change the link speed, I don't need to do anything wild like reboot the ISA box to make the changes take effect?  I can if I need to in order to get this to work.

(in reply to aek033)
Post #: 3
RE: ISA 2006 slow uploads - 20.Jul.2007 3:39:13 PM   
ITEngineer

 

Posts: 256
Joined: 3.Feb.2006
Status: offline 		what is your Internal & External Network Cards settings ?

(in reply to digitlman)
Post #: 4
RE: ISA 2006 slow uploads - 20.Jul.2007 4:16:09 PM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		internal is 1 Gig, and ext is 100MB.  Both now set to auto.

(in reply to ITEngineer)
Post #: 5
RE: ISA 2006 slow uploads - 20.Jul.2007 5:26:48 PM   
elmajdal

 

Posts: 5060
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline
quote:

ORIGINAL: digitlman

internal is 1 Gig, and ext is 100MB.  Both now set to auto.


i think ITEngineer was looking for your IP , DG, DNS on both NICs

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to digitlman)
Post #: 6
RE: ISA 2006 slow uploads - 21.Jul.2007 11:01:55 AM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		I'll post that info when I get back into the office on Monday.

Thanks!

(in reply to elmajdal)
Post #: 7
RE: ISA 2006 slow uploads - 23.Jul.2007 9:30:42 AM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		Ethernet adapter Internal:

  Connection-specific DNS Suffix  . :
  Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet #2
  Physical Address. . . . . . . . . : 00-15-C5-FC-59-A9
  DHCP Enabled. . . . . . . . . . . : No
  IP Address. . . . . . . . . . . . : 192.168.200.1
  Subnet Mask . . . . . . . . . . . : 255.255.255.0
  Default Gateway . . . . . . . . . :
  DNS Servers . . . . . . . . . . . : 192.168.200.6
  Primary WINS Server . . . . . . . : 192.168.200.6


Ethernet adapter External:

  Connection-specific DNS Suffix  . :
  Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
  Physical Address. . . . . . . . . : 00-10-18-27-E2-EB
  DHCP Enabled. . . . . . . . . . . : No
  IP Address. . . . . . . . . . . . : 12.168.149.66
  Subnet Mask . . . . . . . . . . . : 255.255.255.192
  Default Gateway . . . . . . . . . : 12.168.149.65
  DNS Servers . . . . . . . . . . . : 192.168.200.6
  Primary WINS Server . . . . . . . : 192.168.200.6
  NetBIOS over Tcpip. . . . . . . . : Disabled

(in reply to digitlman)
Post #: 8
RE: ISA 2006 slow uploads - 23.Jul.2007 11:10:16 AM   
elmajdal

 

Posts: 5060
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline 		Hi,

you have misconfigured your External NIC.

quote:

Ethernet adapter External:

Connection-specific DNS Suffix  . :
Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
Physical Address. . . . . . . . . : 00-10-18-27-E2-EB
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 12.168.149.66
Subnet Mask . . . . . . . . . . . : 255.255.255.192
Default Gateway . . . . . . . . . : 12.168.149.65
  DNS Servers . . . . . . . . . . . : 192.168.200.6
Primary WINS Server . . . . . . . : 192.168.200.6
  NetBIOS over Tcpip. . . . . . . . : Disabled


Never put a DNS/WINS entry on the External NIC.


you need to have an Internal DNS Server, that will forward external Requests to your ISP DNS Servers, read this  http://elmajdal.net/isaserver/Internal_DNS_Forwarding.aspx


HTH,
Tarek

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to digitlman)
Post #: 9
RE: ISA 2006 slow uploads - 23.Jul.2007 11:27:49 AM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		Ok, we can fix this misconfiguration.

Do you think this has any effect on our slow UL speeds?

(in reply to elmajdal)
Post #: 10
RE: ISA 2006 slow uploads - 23.Jul.2007 12:29:17 PM   
elmajdal

 

Posts: 5060
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline 		Hi,

Network Cards Configuration is one of the main key configuration for ISA Server.

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to digitlman)
Post #: 11
RE: ISA 2006 slow uploads - 23.Jul.2007 12:31:39 PM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		Granted, but would DNS configured on the external NIC affect outbound bandwidth?

(in reply to elmajdal)
Post #: 12
RE: ISA 2006 slow uploads - 26.Jul.2007 4:27:02 PM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		Any further advice/suggestions?

(in reply to digitlman)
Post #: 13
RE: ISA 2006 slow uploads - 2.Oct.2007 12:14:05 PM   
digitlman

 

Posts: 12
Joined: 19.Jul.2007
Status: offline 		After opening a support case with Microsoft and working with an engineer, the "fix" has been to disable the web proxy filter. 

I still cannot fathom why I need to turn off a (major) feature of ISA to get the damn thing to function the way it is supposed to work.

My question is:  What are the ramifications of turning off the filter?  I was told that the HTTP filters would still work, but each client still makes a direct connection to the target site, and all caching by ISA is nullified.  What else would I be missing in this configuration?

(in reply to digitlman)
Post #: 14

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