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Date:      Wed, 24 Sep 2008 17:31:46 -0700
From:      Alfred Perlstein <alfred@freebsd.org>
To:        Adam Stylinski <kungfujesus06@gmail.com>
Cc:        freebsd-net@freebsd.org
Subject:   Re: Question regarding NFS
Message-ID:  <20080925003146.GI36572@elvis.mu.org>
In-Reply-To: <96af083b0809181644o6136af1fybf0110f227f04f3b@mail.gmail.com>
References:  <96af083b0809181644o6136af1fybf0110f227f04f3b@mail.gmail.com>

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* Adam Stylinski <kungfujesus06@gmail.com> [080918 17:15] wrote:
> Hello,
>       I am running an IPCop firewall for my entire network.  I have a
> wireless network device on the blue subnet which must access a freebsd NFS
> server.  In order to do this, I need to open a DMZ pinhole on a few select
> ports.  It's my understanding that NFS chooses random ports and I was
> wondering if there was a way I could fix this.  There is a good reason that
> the subnet for the wireless is separate from the wired and I'd rather not
> configure this thing over a VPN.  The client connecting to the NFS server is
> a voyage computer (pretty much a small debian).  Also, if at all possible,
> I'd like to keep performance reasonably high when large volumes of clients
> are connecting to the NFS server, I'm not sure if binding to one port may or
> may not make this impossible.  I apologize for my stupidity and lack of
> understanding when it comes to NFS.  Any help would be gladly appreciated,
> guys.

_usually_ NFS uses port 2049 on the server side.  I think the client may
bind to a random low port, this would be annoying to change, but could
be done with a kernel hack relatively easily.  Look at the code in
src/sys/nfsclient/nfs_socket.c, there's some code that that deals with
binding sockets that you can play with.

-- 
- Alfred Perlstein



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