Re: Configure ISA to allow ISA Server to make external FTP Connection

From: Stuart Mackie [MCP, MSP] (newsgroups_at_--REMOVE_THIS-NO_SPAM--stu.uk.com)
Date: 09/20/04 

Date: Mon, 20 Sep 2004 10:37:54 +0100

Hi Jim. I thought that would be the case, just wanted to check in case
there was another way :) Thanks for your help. 

-- 
Stuart.
"Jim Harrison [MSFT]" <jmharr@online.microsoft.com> wrote in message 
news:OUl6jKrnEHA.1296@TK2MSFTNGP09.phx.gbl...
> Packet filters are ignorant of such niceties as "domains".
> They know IP, protocol, direction and port.
> You can limit the "remote" to a single IP address, though.
>
> -- 
> Jim Harrison [ISASE]
> Read the help, books and articles!
>
> This posting is provided "AS IS" with no warranties, and confers no 
> rights.
>
>
> "Stuart Mackie [MCP, MSP]" <newsgroups@--REMOVE_THIS-NO_SPAM--stu.uk.com> 
> wrote in message
> news:OpXM3ipnEHA.2616@tk2msftngp13.phx.gbl...
> Hi Jim, thanks for the reply.  Is there any way we can Configure ISA to
> allow the FTP connection but only to a particular domain ?  From 
> configuring
> the PF as per below this works perfectly, but it allows FTP connections to
> all external addresses.  In terms of security I would really like to limit
> this to one particular domain e.g. *.windowsupdate.microsoft.com etc  Is
> this possible ?
>
> -- 
> Thanks,
> Stuart
>
>
> "Jim Harrison [MSFT]" <jmharr@online.microsoft.com> wrote in message
> news:ObuMxDnnEHA.3072@TK2MSFTNGP09.phx.gbl...
>> Actually, the FTP server should be making the data connections to your 
>> ISA
>> from port 20, not to it.
>> FTP protocol allows the client/server pair to specify the ports they use.
>> Generally, you should configure the PF as:
>>
>> "FTP Control Out"
>> Protocol = TCP
>> Direction = Outbound
>> Local port =any
>> Remote port = 21
>>
>> "FTP Data In"
>> Protocol = TCP
>> Direction = Inbound
>> Local port =any
>> Remote port = 20
>>
>> -- 
>> Jim Harrison [ISASE]
>> Read the help, books and articles!
>>
>> This posting is provided "AS IS" with no warranties, and confers no
>> rights.
>>
>>
>> "Stuart Mackie [MCP, MSP]" <newsgroups@--REMOVE_THIS-NO_SPAM--stu.uk.com>
>> wrote in message
>> news:uWecWQdnEHA.3900@TK2MSFTNGP10.phx.gbl...
>> Hi.  I am trying to configure ISA to allow the ISA Server itself to make
>> an
>> outgoing FTP connection to an external server and pull down an update
>> file.
>> We are using a .cmd script to do this and therefore cannot do any proxy
>> authentication.  So far I have created a Packet filter to allow the
>> outgoing
>> FTP connection to Port 21, but since the server is behind a NAT router,
>> the
>> FTP server is responding back to our server's external nic on Port 20 and
>> is
>> therefore blocked.
>>
>> Is it possible to configure ISA to allow the outgoing connection from the
>> ISA server to the external server on port 21, and in combination with 
>> this
>> accept the incoming connection on Port 20 ?
>>
>> Also, currently I've configured the Packet Filter to allow the FTP
>> connection to go to any host.  I would prefer to restrict which host but
>> have to do it by domain name rather than IP.  Is this possible in
>> combination with the above Packet FIlter ?
>>
>> -- 
>> Thanks for any help,
>> Stuart.
>>
>>
>>
>
>
>

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