List Archive: gentoo-security
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Am Freitag, 9. Januar 2004 07:36 schrieb mir Mark Hurst:
> > Probably you think ICMP is dangerous too. There are a lot of brain
> > dead admins who blocks ICMP packets and they wonder why connections
> > to some websites are broken or if they administrate the packet filter
> > before a webserver they wonder why some user grouches they wouldn't
> > get a connection to the web server.
> Ever heard of Smurf or Loki?
> If you allow all ICMP in you are indeed a brain-dead admin, in my
> opinion. Sure, host unreachable, DF should be allowed in, but why
> should an external host be able to send timestamp or subnet requests?
You can reject some unuseful things like that, but what I wanted to say is
that communication is not bad you connect to the internet to communicate.
There a different types of ICMP messages, you don't *need* all of them
but you should know, that communication and ICMP is not a bad thing.
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