Re: SNMP to nmap?

[Evan Brewer <dmessiah () silcon com>]

On Thu, Dec 17, 1998 at 01:18:19PM -0700, ubik wrote:

>   This isn't really true.  NFS is a special case since it typically runs
> on a well known port.  Most (all?) of the other RPC services allocate
> ephemeral ports so you can't determine which RPC service is running on a
> certain port in a reliable way by simply portscanning.

Well as port scanning goes, I've never had a situation where I was looking for
an rpc service that didnt sit on a static port.

>   The point of RPC scanning that in situations where packet filters
> prohibit connections to the portmapper (often advocated on CSU to
> "enhance security") you can still easily find out what port a particular
> service exists on by sending requests to invoke to NULL procedure for 
> the service to every open UDP port.  If you find the service, you will get
> a response.

My sentiments exactly.

dmess0r