- My View
You can look for IP Range Based Authentication: http://wiki.servicenow.com/index.php?title=IP_Range_Based_Authentication#gsc.tab=0
Hit Like or Correct on the impact of response.
I have gone through the link you shared.
except IP range is there any other way?
Requirement: we want to give side door access to only 1 user , for other users https://yourinstance.service-now.com/side_door.do URL will redirect to SSO login page.