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litespeed_wiki:config:enable_quic [2019/01/15 14:41] qtwrk |
litespeed_wiki:config:enable_quic [2019/03/26 17:26] Lucas Rolff [cPanel] add UDPFLOOD text |
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- | ===== How to Open UDP Port 433 at the Firewall ===== | + | ===== How to Open UDP Port 443 at the Firewall ===== |
[[https://en.wikipedia.org/wiki/QUIC|QUIC]] runs a stream-multiplexing protocol over Transport Layer Security (TLS) on top of UDP instead of TCP. Be sure you've enabled the port with both TCP //and// UDP. Most of the time, TCP 443 is enabled. | [[https://en.wikipedia.org/wiki/QUIC|QUIC]] runs a stream-multiplexing protocol over Transport Layer Security (TLS) on top of UDP instead of TCP. Be sure you've enabled the port with both TCP //and// UDP. Most of the time, TCP 443 is enabled. | ||
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{{ :litespeed_wiki:config:udp-443-csf-quic.png?400 |}} | {{ :litespeed_wiki:config:udp-443-csf-quic.png?400 |}} | ||
+ | Also make sure that ''UDPFLOOD'' is set to 0. | ||
==== Plesk ==== | ==== Plesk ==== | ||
If a firewall is activated, you need to enable UDP 443 manually. | If a firewall is activated, you need to enable UDP 443 manually. | ||
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==== Possibly bad cached SSL certificates ==== | ==== Possibly bad cached SSL certificates ==== | ||
- | Sometimes, specially when the site in question encountered a HTTPS error before, Chrome will save the SSL certificate in cache and cause QUIC unable to establish connection, in this case it can simply fixed by clean browser cache. | + | Sometimes, especially when the site in question has encountered an SSL/TLS error before, Chrome will save the certificate in cache and cause QUIC to be unable to establish a connection. In this case, it can simply be fixed by clearing the browser cache. |