docker network - assign multiple ip-range by itables

I need add to my docker network which I using for squid, outgoing ip range from xx.ip to yy.ip.
At the moment I adding single ip using bellow command:

iptables -t nat -A POSTROUTING -s ! -o bridge-coi -j SNAT --to-source

How I can add range ip?

When I put several many above command, not working.

Docker networks have no restriction for outgoing traffic. Are you trying to restrict outgoing traffic from your containerized squid to a specific ip-range?


I have 1 main ip, and 256 failover ip.
At the moment I setup from main ip to one failover ip, but I dont know, how I can setup not single ip, but range?