Re: nfs-kernel-server and firewalls

[Tom Allison]

Ernest Johanson wrote:
Good refinement to tighten things up.

Thanks.
I thought it would be necessary to re-run rpcinfo each time I booted 
because I can't find anything that says these ports are a certainty.
That, and I only have NFS 3 support that I have to worry about.



# NFS
# First you open up the RPC port
iptables -A INPUT -i $IFACE -p udp -s $LAN --sport $LO_PORTS \
        -d $IF_ADDRESS --dport sunrpc -m state --state NEW \
        -j ACCEPT
iptables -A INPUT -i $IFACE -p tcp -s $LAN --sport $LO_PORTS \
        -d $IF_ADDRESS --dport sunrpc -m state --state NEW \
        -j ACCEPT
# Since rpc is so varied and large in it's ports I thought
# It easiest to just capture them all there and scroll throue
# the list.  One for TCP, one for UDP
TCP=`rpcinfo -p | grep "3   tcp" | awk '{print $4}' | sort | uniq`
for P in $TCP; do
        iptables -A INPUT -i $IFACE -p tcp -s $LAN --sport $LO_PORTS \
                -d $IF_ADDRESS --dport $P -m state --state NEW \
                -j ACCEPT
done
UDP=`rpcinfo -p | grep "3   udp" | awk '{print $4}' | sort | uniq`
for P in $UDP; do
        iptables -A INPUT -i $IFACE -p udp -s $LAN --sport $LO_PORTS \
                -d $IF_ADDRESS --dport $P -m state --state NEW \
                -j ACCEPT
done


Ernest Johanson
Systems Administrator
Fuller Theological Seminary

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