If not empty, meaning depends on value of field ipHostAccessLoginViaWalledGarden: - false: Two frames are used. During login, left frame shows internal login-page, and right frame shows specified walled-garden-page, e.g. 'http://www.thecompany.com/'. After successful login, if ipHostAccessPostLoginURL is empty, right frame is kept. Otherwise, right frame is replaced by related external post-login-page. - true: Single frame is used. URL specifies external login-page to be used instead of internal one. External server must make sure that client sends its account-data to Hotspot-gateway for access-control afterwards. After successful login, if ipHostAccessPostLoginURL is empty, frame is replaced by internal status-page. Otherwise, frame is replaced by related external post-login-page. This field can be deactivated via empty string or via field ipHostAccessWalledStatus. In this case, the following default-scenario applies: Single frame and internal login-page is used. After successful login, if ipHostAccessPostLoginURL is empty, frame is replaced by internal status-page. Otherwise, is replaced by related external post-login-page.