[systemd-devel] IPAddressDeny/IPAddressAllow is too limited ot be useful

[Reindl Harald]

http://0pointer.net/blog/ip-accounting-and-access-lists-with-systemd.html

"All traffic from and to this address will be prohibited for processes
of the service" is nice in theory but let's say we have a internal
webserver which needs to make curl calls to the internet

IPAddressDeny=any
IPAddressAllow=localhost
IPAddressAllow=10.0.0.0/8
IPAddressAllow=192.168.0.0/16
IPAddressAllow=172.16.0.0/12

can not be used

IPAddressDenyIn=any
IPAddressAllowIn=localhost
IPAddressAllowIn=10.0.0.0/8
IPAddressAllowIn=192.168.0.0/16
IPAddressAllowIn=172.16.0.0/12

would be broadly useable