iptables allow ports commands for HP Printer

iptables_allow_hpprinter.sh

if1=br0
if2=wlan1
net=192.168.2.0/24
ip=192.168.2.2
iptables -I FORWARD -i $if1 -o $if2 -s $net -d $ip -p udp -m multiport \
    --dports 80,137,138,161,427,443,5222,5223,5297,5298,5353 \
    -m state --state NEW -j ACCEPT
iptables -I FORWARD -i $if1 -o $if2 -s $net -d $ip -p tcp -m multiport \
    --dports 80,137,139,427,443,5222,5223,5297,5298,5353,9100,9220,9500 \
    -m state --state NEW -j ACCEPT

cat <<EOF

# Tested with HP OfficeJet 6500

## Ubuntu -> Printer
you need the port 9100/tcp only.

## Android -> Printer
you need several ports in below commands.

## Reference
- https://h30434.www3.hp.com/t5/Inkjet-Printing/iptables-port-rules-for-HP-printing-scanning-amp-ePrint-app/td-p/5585381

EOF