nanog mailing list archives
Re: Firewall in Routers??
From: Andrew Smith <awsmith () rip ops neosoft com>
Date: Mon, 3 Mar 1997 20:37:58 -0600 (CST)
Just to throw in a little bit more info.. Theres little comparrison between the two. PIX is more of an address translation unit with firewalling capabilities. Firewall-1 is a fully functional Firewall with limited address translation. i.e. PIX has a pool of IP addresses.. true address translation. Firewall-1 does address 'hiding' making it look to the external world like all connects come from a single IP.
Actually, hide mode is only one of the options in FW-1. You can do a static one-to-one allocation (but not dynamically).
I tend to prefer to keep routers as routers and firewalls as firewalls, it reduces the CPU overhead, Problem Determination is easier, and configurations are kept in a distinct logical box. Of course this is at the expense of cost, and space.
Agreed...but in certain situations, ie a widely diverse network, to follow this purist paradigm, you really need a separate firewall/ uniquely routed subnet. If someone has a 75XX with a T1 Internet connection, why not let the extra CPU go towards firewall functions. Granted, you are very limited in logging, authentication, and proxies or content monitoring, but such capabilities could be made with proprietary communication to a central firewall/management server...but then you are really straying away from IOS/whatever OS each router uses. In short, if it's built, someone will buy it. Is it enough people to pay for the development/political maneuvering? --------------------------------------------------------------------------- Andrew Smith ** awsmith () neosoft com ** Network Engineer ** 1-888-NEOSOFT ** "Opportunities multiply as they are seized" - Sun Tzu ** ** http://www.neosoft.com/neosoft/staff/andrew ** --------------------------------------------------------------------------- - - - - - - - - - - - - - - - - -
Current thread:
- Firewall in Routers?? Tim Crowell (Mar 03)
- Re: Firewall in Routers?? Paul Knight (Mar 03)
- Re: Firewall in Routers?? Andrew Smith (Mar 03)
- Re: Firewall in Routers?? Glynn Stanton (Mar 03)
- Re: Firewall in Routers?? Andrew Smith (Mar 03)
- Re: Firewall in Routers?? Michael Dillon (Mar 03)
- Re: Firewall in Routers?? Brian Tackett (Mar 04)
- Re: Firewall in Routers?? Robert Laughlin (Mar 04)
- Re: Firewall in Routers?? Paul R.D. Lantinga (Mar 04)
- Re: Firewall in Routers?? Glynn Stanton (Mar 03)
- <Possible follow-ups>
- Re: Firewall in Routers?? Stan Barber (Mar 04)
- Re: Firewall in Routers?? William S. Duncanson (Mar 04)
- Re: Firewall in Routers?? dave o'leary (Mar 05)
- Re: Firewall in Routers?? Robert Laughlin (Mar 05)
- Re: Firewall in Routers?? dave o'leary (Mar 05)
- Re: Firewall in Routers?? Glynn Stanton (Mar 05)
- Re: Firewall in Routers?? dave o'leary (Mar 05)