RE: MTU Size

From: "Amy Babinchak" <amy@xxxxxxxxxxxxxxxxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Date: Fri, 11 Jun 2004 16:17:08 -0400
Thanks. I actually found an article on isaserver.org that had detailed
information on how to set the MTU size in the server. I'll hang on to
the script though. I love scripts but don't have the time to write them.

BTW Tom, I searched on your website for MTU but didn't come up with any
results. I consulted the book, nothing. I posted here, then went to
Google. Google led me back to your site to an article titled ISA Server
and DSL. Since that article has so much MTU information it would be
handy to index it so it will come up on a search for MTU.

Thanks all. I'm about to reboot and test.

Amy 
 

-----Original Message-----
From: josephk [mailto:josephk@xxxxxxxxx] 
Sent: Friday, June 11, 2004 4:05 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: MTU Size

http://www.ISAserver.org

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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RE: MTU Size

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