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Re: [cobalt-security] ICMP protocol
- Subject: Re: [cobalt-security] ICMP protocol
- From: Gareth Bromley <gbromley@xxxxxxxxxxx>
- Date: Wed, 25 Apr 2001 21:03:37 +0100
- Organization: Int* Consulting Ltd
- List-id: Mailing list for users to address network security on Cobalt products. <cobalt-security.list.cobalt.com>
Nic LAWRENCE wrote:
> One question I have is, is there any particular reason why you specifically
> specified the destination IP on the tcp and udp rules? Is there a reason why
> you wouldn't want it to apply to "anywhere",.. or do you just "have to"
> specify a destination?
UNIX traceroute uses UDP to 'trace' the route around the network,
Windows use Echo ICMP packets
Its normally from a fixed UDP source port to an incrementing destination
port.
Hope this helps,
--Gareth