Differences

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--- litespeed_wiki:licenses:failed-to-contact-license-server [2018/08/21 16:01]
Jackson Zhang [Check your DNS server]
+++ litespeed_wiki:licenses:failed-to-contact-license-server [2019/01/08 18:44]
Jackson Zhang [Check your service provider]
@@ Line 52: / Line 52: @@
 ===== Check your DNS server and Disable IPv6 DNS server =====
-If your server can connect to the license server without any problem but it still returns "failed to contact license 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>
-Check if there's any IPv6 nameserver, try commend out the IPv6 server record and try 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
+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
@@ Line 60: / Line 74: @@
 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.
+===== Add license server IPs to whitelist =====
+If you would like to add our license server IPs to whitelist, you can add whatever the following resolved to:
+  license.litespeedtech.com
+  license2.litespeedtech.com
+At the time is writing, they are 34.231.236.27 and 167.99.112.67, but they may be changed and you will need to check IPs yourself to make sure.