OpenLiteSpeed 1.7 Released — HTTP/3 and QUIC Support

OpenLiteSpeed 1.7 is a landmark release — bringing native HTTP/3 and QUIC support to the free, open-source LiteSpeed build. This makes OLS the first free web server with production-ready HTTP/3.

Key Features in OLS 1.7

• HTTP/3 native support — QUIC protocol built-in, no compilation needed
• QUIC 0-RTT — zero round-trip connection resumption
• Improved WebAdmin — new dashboard with real-time metrics
• Better PHP 8.1 integration — full Fibers support via LSAPI
• Enhanced cache rules — more granular cache control

Enable HTTP/3 in OLS 1.7

# Update to 1.7
sudo apt update && sudo apt upgrade openlitespeed -y

# Enable QUIC in WebAdmin
WebAdmin → Listeners → SSL Listener
→ QUIC: Enabled
→ QUIC Options: default

# Open UDP 443 for QUIC
sudo ufw allow 443/udp

Verify HTTP/3 is Active

curl --http3 -I https://yourdomain.com
# Look for: Alt-Svc: h3=":443"

# Chrome DevTools → Network → Protocol column
# Should show: h3

Performance Impact of HTTP/3

# h2load benchmark
h2load --h1 -n 1000 -c 100 https://yourdomain.com/  # HTTP/1.1
h2load -n 1000 -c 100 https://yourdomain.com/       # HTTP/2
# HTTP/3 benchmark with quic-go or curl --http3

Conclusion

OLS 1.7 makes HTTP/3 accessible to everyone at zero cost. Our team deploys and configures OpenLiteSpeed with HTTP/3 for production environments.