[Discuss] Port Scanning

[daniel at syntheticblue.com (Daniel M Gessel)]

Firewalls seem like an ideal solution: a trusted network inside an 
effective firewall is free from the (not insignificant) overhead of 
security.

But firewalls aren't completely effective and are only one tool that we 
all use on a daily basis.


On 2024-08-01 21:46, Rich Pieri wrote:
> On Thu, 1 Aug 2024 16:37:47 -0700
> Kent Borg <kentborg at borg.org> wrote:
>
>> And all of that was built on the unquestioned assumption that
>> firewalls are how we keep our computing safe.
> I think you're putting the cart before the horse.
>
> Because we didn't have firewalls in the 1980s. The concept existed and
> probably a few organizations had very basic (by contemporary standards)
> firewalls to isolate things. But generally? Those 50K ARPANET nodes?
> Almost all could connect directly to each other.
>
> We didn't build an infrastructure that expected firewalls to protect
> it. We built firewalls to protect the infrastructure that originally
> didn't need protecting.
>