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What to do When Contact With License Server Fails?
When your server fails to contact the license server, it may be an easy fix on your end. Please check the following before you log a ticket.
Is your server DNS ok?
To check your DNS, run:
ping gooogle.com
Does it return the right result? (Don't try to ping our license server since it is not allowed.)
~> ping google.com PING google.com (172.217.12.206) 56(84) bytes of data. 64 bytes from lga25s63-in-f14.1e100.net (172.217.12.206): icmp_seq=1 ttl=128 time=10.1 ms 64 bytes from lga25s63-in-f14.1e100.net (172.217.12.206): icmp_seq=2 ttl=128 time=11.3 ms 64 bytes from lga25s63-in-f14.1e100.net (172.217.12.206): icmp_seq=3 ttl=128 time=12.5 ms
Does telnet work?
If your DNS is ok, you can try to telnet to our license server by using port 443. Try license and/or license2.
telnet license.litespeedtech.com 443 telnet license2.litespeedtech.com 443
~> telnet license.litespeedtech.com 443 Trying 35.171.237.73... Connected to license.litespeedtech.com. Escape character is '^]'. ^] telnet> quit Connection closed.
If you see the above, it means your server can connect to LiteSpeed's license server without any problem.
Does curl work?
Run the following curl commands:
curl -I -k https://license.litespeedtech.com curl -I -k https://license2.litespeedtech.com
~> curl -I -k https://license.litespeedtech.com HTTP/1.1 404 Not Found Date: Tue, 05 Jun 2018 18:54:16 GMT Accept-Ranges: bytes Server: LiteSpeed Alt-Svc: quic=":443"; ma=2592000; v="35,37,38,39" Connection: Keep-Alive
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
If your server can connect to the license server without any problem but it still returns “failed to contact license server”
cat /etc/resolv.conf
Check if there's any IPv6 nameserver, try commend out the record and try verify license again.
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.