Differences

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--- litespeed_wiki:licenses:failed-to-contact-license-server [2018/06/05 19:20]
Lisa Clarke Proofreading
+++ litespeed_wiki:licenses:failed-to-contact-license-server [2018/08/21 16:09]
Jackson Zhang [Check your DNS server and Disable IPv6 DNS server]
@@ Line 50: / Line 50: @@
 If you see the above, it means your server connected to the license server without any problem. Don't worry about "404 Not Found". It is normal.
+===== Check your DNS server and Disable IPv6 DNS server =====
+Check if there's any IPv6 DNS nameserver. Our license server does not like IPv6 mapped IPv4 addresses.
+<code>cat /etc/resolv.conf</code>
+  nameserver 62.50.161.166
+  nameserver 217.149.113.30
+  nameserver 2620:0:ccc::2
+  nameserver 2620:0:ccd::2
+  nameserver 2001:4860:4860::8888
+If so, comment out the IPv6 server records and try to verify license again.
+  nameserver 62.50.161.166
+  nameserver 217.149.113.30
+  #nameserver 2620:0:ccc::2
+  #nameserver 2620:0:ccd::2
+  #nameserver 2001:4860:4860::8888
 ===== Check your service provider =====
 If your server can connect to the license server without any problem but it still returns "failed to contact license server", most likely your datacenter blocks the license server. You will need to contact your service provider to fix it.