SWG 8450 as a proxy

hi guys,

Good day

im implementing a SWG 8450 as a proxy, may LAN is connected (straight cable) to a accessed port (vlan1). but when i enable/configure proxy to a web browser ( LAN IP with port 8080), workstation cant access internet.

Is there any configuration that we need? in my network?Firewall? router?

thanks,