Great Circle Associates Firewalls
(March 1993)
 

Indexed By Date: [Previous] [Next] Indexed By Thread: [Previous] [Next]

Subject: Re: Firewalls and NFS
From: Bill Wohler <wohler @ hw1175 . sap-ag . de>
Organization: SAP AG Walldorf, Germany
Date: Mon, 22 Mar 1993 15:07:28 +0100
To: firewalls-digest @ sap-ag . de
In-reply-to: Chris Davies's message of Wed, 17 Mar 1993 15:02:12 GMT
Phone: +49 6227-344131 Home: +49 6221-163255
Reply-to: Bill Wohler <wohler @ sap-ag . de>

chris,

  what you're calling the gateway is the firewall--the only host that your
  router allows packets to reach.

chris> 5.  We'd really like some sort of (very lightly used) network file
chris>     system to be available between one of our local hosts and a host on
chris>     the specific remote network.  Does Sun-NFS work over long distance
chris>     internet connections (i.e. are the packets normally blocked)?

  it'll work fine for you...and everyone else.  don't allow folks on
  the internet to access nfs on your internal net.

chris> 4.  It would be real nice if users on our US office network could drive
chris>     straight through our gateway as if it weren't there.

  it's easy enough for someone to spoof your us office network and
  drive straight through your router as well.  this *is* a good
  problem.  does anyone have any good solutions?

chris> To reach an internal machine
chris>     it would be necessary to login to the gateway and then
chris>     rlogin/telnet again from there.

  i haven't been able to decide what to do with this and hope to hear
  more response from the list.  add users to the firewall, and you add
  too much noise to the logs for them to do any good, as well as
  adding to the vulnerability of the firewall.  have all users go
  through a single account and you have a password distribution, and
  accountability problem.

  unfortunately, there is always a tradeoff: the better the security,
  the more inconvenient the firewall.  is a convenient, secure
  firewall desirable?  attainable?

Bill Wohler 				<wohler @
 sap-ag .
 de>  		
SAP AG					Heidelberg Red Barons
Postmaster				Ultimate Frisbee Team




Follow-Ups:
Indexed By Date Previous: Re: DNS/libresolv/4.1.3/dlopen ld complaints
From: sten @ ergon . ch (Sten Gunterberg)
Next: Firewalls and NFS -
From: Marcus J Ranum <mjr @ TIS . COM>
Indexed By Thread Previous: Firewalls and NFS
From: chris @ visionware . co . uk (Chris Davies)
Next: Re: Firewalls and NFS
From: Amos Shapira <amoss @ cs . huji . ac . il>

Google
 
Search Internet Search www.greatcircle.com