Re: ISA 2000 ARP Broadcasts?
- From: Troy Radtke <TRadtke@xxxxxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 15 Apr 2004 09:40:32 -0500
*Ding Ding Ding*
*tosses Tom and Jim a cookie*
You da men!
*goes back to looking at arp/cam tables to map out a switch layout*
-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Thursday, April 15, 2004 9:18 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Hi Jim,
No problem with that. Otherwise, the ARP would be for the default gateway
address for remote segments (based on the routing table).
Thanks!
Tom
Thomas W Shinder
www.isaserver.org/shinder
ISA 2004 Beta - Get it now!
http://www.microsoft.com/isaserver/beta/default.asp
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Thursday, April 15, 2004 8:57 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Hi Tom,
Correct, but I was trying to point out that Sindows will only ARP what it
believes to be "local", since ARP is limited to Ethernet-local segments...
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/Jim_Harrison/
http://isatools.org
Read the help / books / articles!
On Wed, 14 Apr 2004 09:45:52 -0500
"Thomas W Shinder" <tshinder@xxxxxxxxxxx> wrote: http://www.ISAserver.org
Hi Jim,
It think it will arp just for addresses that it needs to communicate with.
What's really strange is that these stop when the Web Proxy service is
disabled.
Time for me to read up again on Windows arp behavior :)
Thomas W Shinder
www.isaserver.org/shinder
ISA 2004 Beta - Get it now!
http://www.microsoft.com/isaserver/beta/default.asp
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, April 14, 2004 9:37 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
What does ipconfig/all at the ISA produce?
Windows aill arp any IP that it believes to be in its local segment.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/Jim_Harrison/
http://isatools.org
Read the help / books / articles!
On Wed, 14 Apr 2004 09:07:28 -0500
"DL.ISA" <ISA.Discussion@xxxxxxxxxxxxxxxxxxx> wrote:
http://www.ISAserver.org
Glad Joseph was able to get an answer to his hijacked thread. Now, anyone
have an answer for the original poster (me?)
H.323 is not enabled. The arp requests do not appear to be looking for any
specific MAC.
Packets coming across in this manner:
Packetyzer Trace:
Frame 122 (60 bytes on wire, 60 bytes captured)
Frame is marked: False
Arrival Time: Apr 14, 2004 08:54:50.775694000
Time delta from previous packet: 0.050069000 seconds
Time since reference or first frame: 4.456430000 seconds
Frame Number: 122
Packet Length: 60 bytes
Capture Length: 60 bytes
Ethernet II, Src: 00:06:5b:c0:81:69, Dst: ff:ff:ff:ff:ff:ff
Destination: ff:ff:ff:ff:ff:ff (Broadcast)
Source: 00:06:5b:c0:81:69 (DellComp_c0:81:69)
Source or Destination Address: ff:ff:ff:ff:ff:ff (Broadcast)
Source or Destination Address: 00:06:5b:c0:81:69
(DellComp_c0:81:69)
Type: ARP (0x0806)
Trailer: 00000000000000000000000000000000...
Address Resolution Protocol (request)
Hardware type: Ethernet (0x0001)
Protocol type: IP (0x0800)
Hardware size: 6
Protocol size: 4
Opcode: request (0x0001)
Sender MAC address: 00:06:5b:c0:81:69 (DellComp_c0:81:69)
Sender IP address: 172.16.5.50 (172.16.5.50)
Target MAC address: 00:00:00:00:00:00 (00:00:00_00:00:00)
Target IP address: 172.16.142.187 (172.16.142.187)
0000: FF FF FF FF FF FF 00 06 5B C0 81 69 08 06 00 01 ........[..i....
0010: 08 00 06 04 00 01 00 06 5B C0 81 69 AC 10 05 32 ........[..i...2
0020: 00 00 00 00 00 00 AC 10 8E BB 00 00 00 00 00 00 ................
0030: 00 00 00 00 00 00 00 00 00 00 00 00 ............
Any help tracking this down would help. When I stop the web proxy service,
the requests stop.
Thank you,
Mitchell D. Lawrence
Director, Network Administrator
IT&S Department
North Bay Hospital
1711 W. Wheeler Ave
Aransas Pass, TX 78336
ph: (361) 758-0580
fx: (361) 758-0581
pg: (361) 270-0421
Mitchell.Lawrence@xxxxxxxxx
gecko@xxxxxxxxxxxx (home)
**< Good | Cheap | Fast > (Pick Two)**
-----Original Message-----
From: Troy Radtke [mailto:TRadtke@xxxxxxxxxxxx]
Posted At: Tuesday, April 13, 2004 4:50 PM
Posted To: ~ISA Discussion~
Conversation: [isalist] Re: ISA 2000 ARP Broadcasts?
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Dang H.323 dumping multicast onto the network!!!! Evil I tell you!!!!
EEEEEVVVVVIIIILLLL.......
*remembers that poor little hub that burnt out it's collision
lights....*
Troy
-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Tuesday, April 13, 2004 4:31 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Hey guys,
Good one:
http://www.cisco.com/warp/public/788/voip/understand-gatekeepers.html
HTH,
Tom
Thomas W Shinder
www.isaserver.org/shinder
ISA 2004 Beta - Get it now!
http://www.microsoft.com/isaserver/beta/default.asp
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Tuesday, April 13, 2004 4:12 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Neat trick:
- disable the H.323 Application Filter and watch the multicast broadcasts
stop.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG http://www.microsoft.com/isaserver
http://isaserver.org/Jim_Harrison
http://isatools.org
Read the help, books and articles!
----- Original Message -----
From: "cismic" <cismic@xxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Tuesday, April 13, 2004 13:44
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
MessageNo, I don't have any multi-cast applications on any of my machines.
And, that's what I find strange. I wonder if I should turn this off in bios?
Thank you,
Joseph
----- Original Message -----
From: Troy Radtke
To: [ISAserver.org Discussion List]
Sent: Tuesday, April 13, 2004 1:32 PM
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Do you have multicast applications at all?
-----Original Message-----
From: cismic [mailto:cismic@xxxxxxx]
Sent: Tuesday, April 13, 2004 3:13 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Not sure but, I have some network cards that are intel cards and they
send out broadcasts on 224.0.0.0 type of subent\
Maybe that's what's going on.
Joseph
----- Original Message -----
From: DL.ISA
To: [ISAserver.org Discussion List]
Sent: Tuesday, April 13, 2004 1:03 PM
Subject: [isalist] ISA 2000 ARP Broadcasts?
http://www.ISAserver.org
Does anyone have an insight as to why an ISA 2000 server would be
conducting ARP "Who has" broadcasts for all IP addresses
within it's own subnet?
Thanks in advance!
Mitchell D. Lawrence
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