Priscilla, that's not what I said. Here's what I said: "...pings sent by one router will not be filtered by another router? " Hence my diagram for further explanation: Router A -=- Router B -=- Device A (-=- can be ethernet x-over, serial back-to-back, etc) An ACL is applied on Router B's interface (applied inbound) that is connected to Router A. What I originally said, and continue to say, is that Router B will most certainly block packets (pings or whatever) coming from Router A...and it is irrelevant if Router A is a router or a host device. The ACL on Router B doesnt care if the device sending packets is a router or an end host device! If Router B was initiating the ping and Router B had the ACL applied, that would be a different story. ttyl, -Brad Ellis CCIE#5796 [EMAIL PROTECTED] used Cisco: www.optsys.net ""Priscilla Oppenheimer"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > At 08:06 PM 8/26/01, Brad Ellis wrote: > >Priscilla, > > > >Are you saying that pings sent by one router will not be filtered by another > >router? I beg to differ. > > Of course not. Pings sent by the router where the ACL is configured are not > affected by the ACL. Try it. > > Priscilla > > > >-Brad > > > >""Priscilla Oppenheimer"" wrote in message > >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > At 06:26 PM 8/26/01, Brad Ellis wrote: > > > >Sami, > > > > > > > >You'll need to give more info than that. The router does not care if > the > > > >packets are originated from a host or another router. It will filter > > > >packets based on packet information, ie, source address, destination > > > >address, port #... > > > > > > This filtering happens as part of the packet-forwarding process. Packets > > > sent by the router (such as pings) may not go through this process. Sorry > > > that I don't have the details, but I have run into surprising results in > a > > > lab environment when testing access lists from a router. You need to test > > > them from end hosts. > > > > > > I can't believe I'm challenging a CCIE, ;-) but I was afraid nobody else > > > would, and I think the question bears more research. > > > > > > Priscilla > > > > > > >Are you saying the router wont filter packets originated from the router > > > >itself? How are your access-lists applied? Inbound or Outbound? What > >are > > > >you trying to filter? Explain your situation a little better, and > >include > > > >your access-list if you so desire. > > > > > > > >-Brad Ellis > > > >CCIE#5796 > > > >[EMAIL PROTECTED] > > > >used Cisco: www.optsys.net > > > > > > > >""sami natour"" wrote in message > > > >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > > > Hi All , > > > > > When I made standard access list I discoverd that it > > > > > prevented packets originated form PC's and host but > > > > > not packets originated from other routers.Any idea why > > > > > this will happen. > > > > > > > > > > Best Regards , > > > > > sami , > > > > > > > > > > > > > > > __________________________________________________ > > > > > Do You Yahoo!? > > > > > Make international calls for as low as $.04/minute with Yahoo! > >Messenger > > > > > http://phonecard.yahoo.com/ > > > ________________________ > > > > > > Priscilla Oppenheimer > > > http://www.priscilla.com > ________________________ > > Priscilla Oppenheimer > http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=17349&t=17349 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
