Re: use of non-privileged ports for MNT and NLM

[Trond Myklebust <Trond.Myklebust@netapp.com>]

On Tue, 2008-08-19 at 17:14 -0400, Chuck Lever wrote:
> Working on "resvport" mount option.  Question occurred to me:
> 
> If I specify "noresvport" on a mount, can the client also use a non- 
> privileged port for the initial MNT request, and can it use it for the  
> NLM connection as well?
> 
> Question applies not just to Linux servers, but servers in general.   
> Brief searching on teh internets does not reveal a quick answer.  I  
> think rpc.mountd will allow a non-privileged port for "insecure"  
> exports.
> 
> I think the answer is "yes, non-privileged ports can be used for MNT  
> and NLM if the server explicitly allows it" but I thought I would open  
> this up to the list.

How about a default that tries to connect using an insecure port first,
then falls back to a secure port if the attempt fails?

Cheers
  Trond

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@netapp.com
www.netapp.com