Webdispatcher via IP

Dear Gurus

We are trying to work via webdispatcher, using IP adress only, for example:

http://192.168.254.5:8080/sap/bc/nwbc

We cannot logon to abap webdynpro apllicaion, cause FQDN dump.

How can urge the webdispatcher to convert the 192.168.254.5 to FQDN, for example to sapeccdev.mydomain.local at any url prefix?

Regards

Vladimir Kogan