Re: [LARTC] Interesting article about punching holes in firewalls...

2006-12-21 Thread Grant Taylor
Carl-Daniel Hailfinger wrote: I personally have known that using -m state --state ESTABLISHED,RELATED was not the most secure thing to use for returning traffic. Namely this will allow you to make a valid connection to a web server, say to retrieve a picture. Then said web server could send

Re: [LARTC] Interesting article about punching holes in firewalls...

2006-12-21 Thread /dev/rob0
On Thursday 21 December 2006 09:37, Grant Taylor wrote: I have read the article. I suspect that my uncertainty has to do with lack of how the SPI portion of the code works. I am not qualified to read the source code to make an informed opinion. I was (mis)believing that the SPI was very

Re: [LARTC] Interesting article about punching holes in firewalls...

2006-12-21 Thread Stephen Hemminger
On Sun, 17 Dec 2006 20:51:44 -0600 Grant Taylor [EMAIL PROTECTED] wrote: I ran across an interesting article (http://www.heise-security.co.uk/articles/print/82481) (1) that I think any and all firewall administrators should take a few moments to read. I personally have known that using -m

Re: [LARTC] Interesting article about punching holes in firewalls...

2006-12-20 Thread Peter Surda
Grant Taylor schrieb: I personally have known that using -m state --state ESTABLISHED,RELATED was not the most secure thing to use for returning traffic. Actually, what the described method accomplishes is not defeating the firewall part, but the NAT part. If one of the hosts was not behind a

Re: [LARTC] Interesting article about punching holes in firewalls...

2006-12-20 Thread Carl-Daniel Hailfinger
Grant Taylor wrote: I ran across an interesting article (http://www.heise-security.co.uk/articles/print/82481) (1) that I think any and all firewall administrators should take a few moments to read. The article only reiterates the same old stories and FUD which have been known for years. I

[LARTC] Interesting article about punching holes in firewalls...

2006-12-17 Thread Grant Taylor
I ran across an interesting article (http://www.heise-security.co.uk/articles/print/82481) (1) that I think any and all firewall administrators should take a few moments to read. I personally have known that using -m state --state ESTABLISHED,RELATED was not the most secure thing to use for