Re: [ActiveDir] icmp's

[Tom Kern]

I thought i read somewhere in some MS doc it being refered to as "legacy" since now you can put multiple logon scripts in GPO's and that they recommend doing it that way.

 

everytime a new OS or feature comes out, MS tends to refer to the previous os/feature as legacy or down-level.

maybe i just made a silly assumption that using a logon script as a user attritbute( i guess somewhat simillar to the way NT did it) instead of a GPO was "legacy".

thanks

 

On 1/1/06, Al Mulnick <[EMAIL PROTECTED]> wrote:

I personally haven't heard it referred to as "legacy".  I think that may be because it wasn't a legacy method when I last heard it ;)

 

I haven't tested this, so your mileage may vary but: the "legacy" method would have been created and designed for a time before ICMP was the norm. As such, I wouldn't expect that to break if ICMP was disabled.  Several things will break, but I don't believe that's one of them.

 

Test it.  You'll know for sure then right?  Besides, I don't imagine a lot of networks out there are configured with ICMP disabled like that. 

 

Al 

 

On 12/31/05, Tom Kern <[EMAIL PROTECTED]> wrote:

Thats it.

 

Isn't that the way its refered to in MS-speak?

 

I hope i didn't just make that up...

 

On 12/30/05, Brian Desmond <[EMAIL PROTECTED] > wrote:

presumably setting the scriptPath attribute on accounts...

Thanks,
Brian Desmond
[EMAIL PROTECTED]

c - 312.731.3132

________________________________

From: [EMAIL PROTECTED] on behalf of Al Mulnick
Sent: Fri 12/30/2005 8:13 PM
To: ActiveDir@mail.activedir.org
Subject: Re: [ActiveDir] icmp's


When you say legacy way, what does that mean exactly?


On 12/30/05, Tom Kern < [EMAIL PROTECTED]> wrote:

       would this also affect clients from getting logon scripts?
       and when i say logon scripts, i mean the legacy way of distributing them, NOT thru GPO's.

       Thanks again



       On 12/30/05, Brian Desmond <[EMAIL PROTECTED] > wrote:

               You need to enable ICMP echo source clients dest dc's, and icmp echo-reply source dc's dest clients.

               The rules look something like this:

               access-list DC_VLAN_OUT line 1 permit icmp any object-group domain_controllers echo

               access-list DC_VLAN_IN line 1 permit icmp object-group domain_controllers any echo-reply

               Have your network people considered rate-limiting ICMP packets rather than shutting them down all together. IMHO that's the correct way to handle this. Ping (echo, echo-reply) and traceroute (traceroute, time-exceeded) are necessary pieces of a network.

               Thanks,
               Brian Desmond
               [EMAIL PROTECTED]

               c - 312.731.3132

               ________________________________

               From: [EMAIL PROTECTED] on behalf of Tom Kern
               Sent: Fri 12/30/2005 9:25 AM
               To: activedirectory
               Subject: [ActiveDir] icmp's


               What affect would blocking icmp packets on all vlans have on win2k/xp client logons in a win2k forest?
               any?

               I know clients ping dc's to see which responds first and later ping dc's to determine round trip time for GPO processing, but would blocking icmp's have any adverse affects on clients?
               I only ask because my corp blocks icmp's on all our vlans and i get a lot of event id 1000 from Usernev with error code of 59 which when i looked up, refers to network connectivity issues. i think this event id is related to the fact we block icmp packets and i was wondering if thats something i should worry about in a win2k network.
               Thanks