It On 08/07/2017 03:35 PM, Matt Darfeuille wrote: > > > On 8/7/2017 10:51 PM, Tom Eastep wrote: >> On 08/07/2017 01:45 PM, Matt Darfeuille wrote: >>> Hi, >>> >>> My net interface gets it's ip address dinamically asigned by a dhcp server. >>> Sometime I need that address for SNAT, DNAT rules and so on... >>> I use a variable throughout Shorewall that is defined in the params file. >>> Everytime that this ip change, I need to change it manually. >>> >>> I'm currently testing the following to let Shorewall know about that new ip: >>> >>> I have a script in /etc/dhcp/dhclient-exit-hooks that do: >>> >>> case $reason in >>> bound) >>> echo $new_ip_address > /etc/shorewall/current_net_ip >>> shorewall reload >>> ;; >>> esac >>> >>> then in /etc/shorewall/params: >>> >>> CURRENT_NET_IP=$(cat /etc/shorewall/current_net_ip) >>> >>> then I can use 'CURRENT_NET_Ip' throughout Shorewall. >>> >>> I could clearly asign a fix address but for the sake of understanding... >>> Is there a better way to let shorewall know when my net interface gets a >>> new ip or fix address is the way to go? >> >> The best way is to use an address variable >> (http://www.shorewall.org/configuration_file_basics.htm#AddressVariables). >> You still need to use an exit-hook script though. >> > > Can I use address variable in the DEST column of the rules file? > > /etc/shorewall/init: > > NEW_IP_ADDRESS=<IP-ADDRESS> > > /etc/shorewall/rules.d/DNAT.rules: > > DNAT net:$REMOTE_MANAGEMENT_IP $FW:&{NEW_IP_ADDRESS} tcp 22 > > $ shorewall check > > ERROR: Unknown Host (&{NEW_IP_ADDRESS}) > /etc/shorewall/rules.d/DNAT.rules (line 14) > from /etc/shorewall/rules (line 25) > in > I'm tired so I could be rong!
Address variables currently cannot be used in the DEST column of a DNAT rule. But to do what you want in that case, just use a REDIRECT rule. -Tom -- Tom Eastep \ Q: What do you get when you cross a mobster with Shoreline, \ an international standard? Washington, USA \ A: Someone who makes you an offer you can't http://shorewall.org \ understand \_______________________________________________
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