On April 22nd, 2021, IGEL will migrate the IGEL License Portal (ILP) and its infrastructure to a highly available and scalable cloud platform. While IGEL will keep service interruptions to a minimum, we advise our customers not to plan large rollouts of new licenses on April 22nd and 23rd.

The migration happens via three DNS entry changes. The propagation of these DNS changes throughout the internet can take from an hour to 72 hours.

DNS Name


Old IP Address

New IP Address


Web frontend for customers

Eastern US (for North America)

Western Europe (for rest of the world)


Interface for UMS Server

On your local workstation or UMS Server, you can flush the DNS cache with the following commands:

  • Windows Workstation: ipconfig /flushdns - Powershell: Clear-DnsClientCache
  • Windows DNS Server: dnscmd /clearcache - Powershell: Clear-DnsServerCache
  • Linux: sudo /etc/init.d/nscd restart
  • Systemd Resolved (e.g. IGEL OS): sudo systemd-resolve --flush-caches
  • DNSMasq: sudo systemctl restart dnsmasq.service
  • Nscd: sudo systemctl restart nscd.service
  • Mac OS Sierra, El Capitan, Mavericks, Mountain Lion, Lion: sudo killall -HUP mDNSResponder
  • Mac OS X Yosemite: sudo discoveryutil udnsflushcaches
  • Mac OS X Snow Leopard: sudo dscacheutil -flushcache
  • Mac OS X Leopard and below: sudo lookupd -flushcache


If you restrict the internet access of the UMS server to certain IP addresses, make sure to allow, the new address of the SUSI service.