WEBGUI link to access from outside

Dear experts,

we have a requirement to access SAP systems from outside through WAN. we have activated webgui and related services in SICF.

Currently it is working well in intranet however what are all the options available to access from internet.

we have maintained required profile parameters in the sap system.

we have done local installation and host name doesn't have any <abcd.xyz.com> format. FDQN is just

kindly help me to resolve this.

Thanks and regards,

Pradeep