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How to restrict download size

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How to restrict download size - 30.Aug.2004 8:31:00 AM   
misa2

 

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Joined: 26.Aug.2004
From: Nis, Serbia
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Can it be done? I hate the idea of buying 3rd party software just to do this.
Post #: 1
RE: How to restrict download size - 30.Aug.2004 3:48:00 PM   
tshinder

 

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From: Texas
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Hi Misa,

If you don't want to buy software, you can use the SDK.

HTH,
Tom

(in reply to misa2)
Post #: 2
RE: How to restrict download size - 30.Aug.2004 11:24:00 PM   
misa2

 

Posts: 6
Joined: 26.Aug.2004
From: Nis, Serbia
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Yes, I would like to, but the 2004 SDK is not finished AFAIK. And Technet section is full of references to samples, that could not be found anywhere...

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Post #: 3
RE: How to restrict download size - 31.Aug.2004 7:27:00 AM   
tshinder

 

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From: Texas
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Hi Misa,

The SDK is included on the CD.

HTH,
Tom

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Post #: 4
RE: How to restrict download size - 31.Aug.2004 9:48:00 AM   
misa2

 

Posts: 6
Joined: 26.Aug.2004
From: Nis, Serbia
Status: offline
I knew i was missing something. I just hate EA licensing, when I am not the one who receives media...

Thank you for your help

Milos

(in reply to misa2)
Post #: 5
RE: How to restrict download size - 3.Sep.2004 12:21:00 AM   
misa2

 

Posts: 6
Joined: 26.Aug.2004
From: Nis, Serbia
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After a couple of days of playing with SDK, i am testing a webfilter, which drops http 200 responses if the Content-Length in request header exceeds hardcoded value.

The good news is that it works (still testing).

The bad news are:
Its firewall-wide and can't bind to policy.
Its limited to hardcoded value (no settings).

The settings issue isn't that hard to code. However, to have policy specific settings functionality is VERY hard to accomplish.

(in reply to misa2)
Post #: 6
RE: How to restrict download size - 3.Sep.2004 12:13:00 PM   
munnobhai

 

Posts: 94
Joined: 1.Nov.2002
From: Karachi , Pakistan
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Hi,
Could you please provide me the code so I can also work on it ??

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Post #: 7
RE: How to restrict download size - 3.Sep.2004 12:46:00 PM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Hi Misa,

That's great! Good to hear that you have at least part of it working.

Thanks!
Tom

(in reply to misa2)
Post #: 8
RE: How to restrict download size - 5.Sep.2004 9:04:00 AM   
azfar

 

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Joined: 27.Oct.2002
From: Karachi
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Well Misa I hope when you finish it you share it with us.
Thanks.

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Post #: 9
RE: How to restrict download size - 5.Sep.2004 6:27:00 PM   
azfar

 

Posts: 490
Joined: 27.Oct.2002
From: Karachi
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Well guys it can be done by setting max payload lenght in http filtering options.

[ September 05, 2004, 06:29 PM: Message edited by: Azfar Hashmi ]

(in reply to misa2)
Post #: 10
RE: How to restrict download size - 5.Sep.2004 9:20:00 PM   
misa2

 

Posts: 6
Joined: 26.Aug.2004
From: Nis, Serbia
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Hunaid, my email is mkostic_monkey_edn.co.yu. Can you please wait until friday (i'll be out of office).

Azfar, I will share it when i finish it.

And no, it can't be done using max payload length, as it is the length of REQUEST, not the length of the RESPONSE (the one you want to block).

[ September 05, 2004, 09:23 PM: Message edited by: Misa ]

(in reply to misa2)
Post #: 11
RE: How to restrict download size - 6.Sep.2004 9:12:00 AM   
azfar

 

Posts: 490
Joined: 27.Oct.2002
From: Karachi
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You are right Misa but I just checked it for testing and its working [Big Grin] . Any way good to hear that you will share ir with us.

(in reply to misa2)
Post #: 12
RE: How to restrict download size - 6.Sep.2004 9:39:00 AM   
munnobhai

 

Posts: 94
Joined: 1.Nov.2002
From: Karachi , Pakistan
Status: offline
Hi Misa,
I tried to block files with the pay load option and it is working fine !

Waiting for your code ... thanks for reply.

[ September 06, 2004, 09:42 AM: Message edited by: Hunaid Haroon Al Qureshi ]

(in reply to misa2)
Post #: 13
RE: How to restrict download size - 7.Sep.2004 1:25:00 AM   
misa2

 

Posts: 6
Joined: 26.Aug.2004
From: Nis, Serbia
Status: offline
Well, i must say i am puzzled. This payload size simply does not works for me.

Have you tried to download something larger than payload size?

For example, I have set payload size to 1000000 bytes. Now, this url is 2,77MB Some demo softvare download
No matter what i configure for payload size, this request succeeds...

Though it isn't finished yet, Here is Content Length filter with hardcoded 2000000 bytes maximum payload size. Have fun
Content Lenght Filter

Installation
1) Copy it to Program Files\Microsoft ISA Server (or anywhere else), extract the dll.
2) Start->Run->cmd
3) Change to directory where you extracted .dll
4) Type "regsvr32 ContentLengthFilter.dll"
5) wait for regsvr success dialog
6) Open ISA Server Management
7) Go to Configuration-> Add-ins
8) Press F5, and you should see this filter.
9) Make sure it is enabled (it should be by default)

Deinstallation:
1) Start->Run->cmd
2) Change to directory where you extracted .dll
3) Type "regsvr32/u ContentLengthFilter.dll"
4) wait for regsvr success dialog

That's it.

Remember that filter is firewall wide! It is applied to all http traffic, in or out. Regardless of policies. And it's hardcoded to 2000000.

(in reply to misa2)
Post #: 14
RE: How to restrict download size - 7.Sep.2004 9:38:00 AM   
azfar

 

Posts: 490
Joined: 27.Oct.2002
From: Karachi
Status: offline
Thanks Misa Congrat you have done it. But the problem I faced here is when I uncompress it I am getting header error. Can you please mail me directly at azfarhusain@yahoo.com
Yes I tried to download larger then max payload size file and ISA always denied me.
Thanks.

(in reply to misa2)
Post #: 15
RE: How to restrict download size - 7.Sep.2004 11:51:00 AM   
munnobhai

 

Posts: 94
Joined: 1.Nov.2002
From: Karachi , Pakistan
Status: offline
Dear Misa,
Did you add the files extentions in extentions tab ??

Will you please send the code at munnobhai@hotmail.com

Thanks in advance,
Hunaid Haroon.

(in reply to misa2)
Post #: 16
RE: How to restrict download size - 7.Sep.2004 1:23:00 PM   
azfar

 

Posts: 490
Joined: 27.Oct.2002
From: Karachi
Status: offline
I also want to change file length if you could recode it and make it dynamic or send me the code I will change it myself.
Email: azfarhusain@yahoo.com

(in reply to misa2)
Post #: 17

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