yast2-squid from YaST:SLE-12:SP2 project
Select Your Operating System
Add repository and install manually
For SLE 12 SP2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/YaST:SLE-12:SP2/SLE_12_SP2/YaST:SLE-12:SP2.repo zypper refresh zypper install yast2-squid