This info applies to KSC12-14.2. 

Web Console port can be changed from default port 8080 to 443 or any other port not occupied by the operating system or a third-party application.

1. Open file "C:\Program Files\Kaspersky Lab\Kaspersky Security Center Web Console\server\config.json" with any text editor and type the port you would like to use instead of 8080:

2. Restart all Kaspersky Security Center Web Console services via services.msc to apply changes.