RE: MTU Size
- From: "josephk" <josephk@xxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Fri, 11 Jun 2004 13:04:33 -0700
Hi Amy,
You actually specify MTU size based on the TCP/IP parameters for the NIC
cards in the machine.
You can modify the following script to help you make those adjustments.
Thank you,
Joseph
'****************************************************************"
' Module/Class: UpdateMTU.vbs
'
' Version: 1.00.0000"
' Description: Admin tools for automating updating MTU info
'
'
' Last update: 06/12/2004 Joseph Kravis(josephk@xxxxxxxxx)"
' Last Time :
'
' Notes: from the command line run as: cscript.exe UpdateMTU.vbs
'
' ** REVISIONS**"
'
' Date By Description"
' -------- ---------- ------------------------------------------"
' See individual subs for revision information"
'****************************************************************"
const HKEY_LOCAL_MACHINE = &H80000002
strComputer = "."
Set StdOut = WScript.StdOut
'***
' Set WMI to impersonate at the root defalut level for reading selected
key
'***
Set oReg=GetObject("winmgmts:{impersonationLevel=impersonate}!\\" &
strComputer & "\root\default:StdRegProv")
strKeyPath =
"SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces"
oReg.EnumKey HKEY_LOCAL_MACHINE, strKeyPath, arrSubKeys
'***
'Retreive the sub keys for looking at DHCP and IP address fields
'***
'***
' For each interface sub key process values we are looking for (DHCP and
IP)
'***
For Each subkey In arrSubKeys
StdOut.WriteLine " "
StdOut.WriteLine "New Interface " & subkey
'***
'Retreive the sub keys for passed in subkey data
'***
strKeyPathB =
"SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces" & "\" &
subKey
oReg.EnumValues HKEY_LOCAL_MACHINE, strKeyPathB, arrValueNames,
arrValueTypes
StdOut.WriteLine strKeyPathB
For i=0 To UBound(arrValueNames)
oReg.GetExpandedStringValue HKEY_LOCAL_MACHINE, strKeyPathB,
arrValueNames(i) , strValue
'***
' If we have either a DHCP or IP address
'***
IF arrValueNames(i) = "DhcpIPAddress" or
arrValueNames(i) = "IPAddress" Then
'***
' If we have either a DHCP or IP values add the
MTU keyword
'***
IF strValue <> "" or strValue <> "0.0.0.0" THEN
StdOut.WriteLine "Value Name: " &
arrValueNames(i) & " = " & strValue
strValueName = "MTU"
dwValue = 1440
oReg.SetDWORDValue HKEY_LOCAL_MACHINE,
strKeyPathB, strValueName, dwValue
END IF
END IF
NEXT
NEXT 'End arrSubKeys Collection
-----Original Message-----
From: Amy Babinchak [mailto:amy@xxxxxxxxxxxxxxxxxxxxxxxxxx]
Sent: Friday, June 11, 2004 12:48 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] MTU Size
http://www.ISAserver.org
I have a client that connects to a web app that requires a specific MTU
size. I recall having to modify the MTU size on the Sonicwall firewall
that this client used to use. Now they have ISA Server. So where do I
specify the MTU size in ISA?
Amy
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