Firewall Wizards at insecure.org

Re: ECHO Protocol

tdonahue@NOSPAMvonsystems.com (Tim Donahue) — Wed, 02 Jul 2008 10:08:49 -0400

Quoting peng liu : > OK. This is the tricky part since ICMP is built basd on IP protocol and it > works on thesame layer as TCP/UDP. Then why my local services file contains: > > echo 7/tcp > echo 7/udp ...

Scheduling PIX commands

Ian.Rarity@NOSPAMespc.com (Ian Rarity) — Thu, 03 Jul 2008 15:22:49 +0100

Hi all, We've just made some changes to our PIX config, and we need to clear the xlates to make the changes fully live. The only problem with this is that we also have another system that will react badly (to put it ...

FW: ECHO Protocol

dhurst@NOSPAMlisletech.com (David Hurst) — Thu, 3 Jul 2008 11:13:13 -0500

The "echo" service referred to in the local services file is an old Unix service typically implemented directly in inetd.� It listens on port 7 and echos back any data sent to it.� Typically, the echo service should be ...

Re: ECHO Protocol

securescorp@NOSPAMgmail.com (Secure Scorp) — Wed, 2 Jul 2008 10:53:44 +0530

I agree with Paul, no real substitute for actual verification ! however this would be ICMP Code 0 Type 8 packet. Thanks, Aditya Govind Mukadam On Mon, Jun 30, 2008 at 6:31 PM, Paul D. Robertson wrote: > On Thu, 26 Jun 2008, peng liu wrote: ...

Re: ECHO Protocol

roman@NOSPAMjct.ac.il (Haim [Howard] Roman) — Mon, 30 Jun 2008 16:21:50 +0300

In ICMP terminology, "echo" is what we normally call "ping". So "uses ECHO protocol" might just be another way of saying that it uses ICMP. See & search for "Echo Request" & "Echo Reply". Haim (Howard) Roman Computer Center, Jerusalem College of Technology romanatjct.ac.il ...

Re: need opinion of security experts on network design

hausen@NOSPAMpunkt.de (Patrick M. Hausen) — Mon, 30 Jun 2008 15:38:41 +0200

Hello, Sorry for answering myself, but this needs to be corrected: On Wed, Jun 25, 2008 at 06:49:17PM 0200, Patrick M. Hausen wrote: > If you can guarantee that each floor will stay a separate collision ...

Re: Firewall Sizing?

hausen@NOSPAMpunkt.de (Patrick M. Hausen) — Mon, 30 Jun 2008 15:49:53 +0200

Hello, On Thu, Jun 26, 2008 at 06:58:48PM 0100, Paul Hutchings wrote: > In our case I suspect we're a bit of an oddity, as we have a fat internet > pipe and a few hundred users, but not all have full internet access and ...

Re: Firewall Sizing?

firewallwizards@NOSPAMkajtek.org (Marcin Antkiewicz) — Mon, 30 Jun 2008 12:02:56 -0500

On Thu, Jun 26, 2008 at 12:58 PM, Paul Hutchings wrote: > How do you go about sizing a firewall? > Depends on what work the firewall will do - VPN and protocol inspection will take CPU, packet filtering not so much. ...

Re: ECHO Protocol

cleverpigboy@NOSPAMgmail.com (peng liu) — Tue, 1 Jul 2008 11:12:09 +0800

OK. This is the tricky part since ICMP is built basd on IP protocol and it works on thesame layer as TCP/UDP. Then why my local services file contains: echo 7/tcp echo 7/udp So the echo here is different than the Echo, Echo-reply protocol we are talking here? ...

Re: Firewall Sizing?

darden@NOSPAMarmc.org (Darden, Patrick S.) — Mon, 30 Jun 2008 10:12:20 -0400

Paul, This is an incredibly complex question, that I don't think has an easy answer. Major factors (in *generally* desdending order of importance): ...