iptables -A INPUT -p tcp –syn –dport 80 -m connlimit –connlimit-above 15 –connlimit-mask 32 -j REJECT –reject-with tcp-reset
With high speed caching based on nginx, varnish or CDNs in general the client ip gets lost. All IPs get reported as 127.0.0.1 since the proxy is making the socket request. Solution is two phased: 1) enable reporting the client IP to the X-Forwarded-For header at the proxy or CDN. This depends on the proxy will […]
Unlike most other configuration systems varnish went with a compiled configuration so if there is a mistake all you get is : Starting varnish HTTP accelerator: [FAILED] To check what the problem is use the following : varnishd -C -f default.vcl varnishd -C -f default.vcl Message from VCC-compiler: Expected return action name. (input Line […]
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