I am a Linux and Nginx novice, but have learnt enough to get it installed and running and acting as a reverse proxy for two (very quiet) internal webservers. This has been running fine for months, but I recently started getting 500 errors.

Here is the output of var/log/nginx/error.log (I have replaced our company name with "companyname.com")

I am a Linux and Nginx novice, but have learnt enough to get it installed and running and web2ing as a reverse proxy for two internal webservers. This has been running fine for months, but I recently started getting 500 errors.

Here is the recent output of var/log/nginx/error.log
(I have replaced our company name with "companyname.com" and replaced our public WAN IP address with <WANIP>

2020/02/10 15:17:49 [alert] 1069#1069: *1011 socket() failed (24: Too many open files) while connecting to upstream, client: 10.10.10.1, server: web1.companyname.com, request: "GET / HTTP/1.0", upstream: "https://<WANIP>:443/", host: "web1.companyname.com"
2020/02/10 15:21:41 [alert] 1069#1069: *2022 socket() failed (24: Too many open files) while connecting to upstream, client: 10.10.10.1, server: web2.companyname.com, request: "GET / HTTP/1.0", upstream: "https://<WANIP>:443/", host: "web2.companyname.com"
2020/02/10 15:33:28 [alert] 1084#1084: *19987 socket() failed (24: Too many open files) while connecting to upstream, client: 10.10.10.1, server: web2.companyname.com, request: "GET / HTTP/1.0", upstream: "https://<WANIP>:443/", host: "web2.companyname.com"
2020/02/10 15:34:16 [alert] 1084#1084: *39974 socket() failed (24: Too many open files) while connecting to upstream, client: 10.10.10.1, server: web1.companyname.com, request: "GET / HTTP/1.0", upstream: "https://<WANIP>:443/", host: "web1.companyname.com"
2020/02/10 15:50:30 [error] 1086#1086: *1 client intended to send too large body: 4294967295 bytes, client: 176.58.124.134, server: london.companyname.com, request: "GET /msdn.cpp HTTP/1.1", host: "<WANIP>"
2020/02/10 16:32:56 [alert] 1086#1086: *19989 socket() failed (24: Too many open files) while connecting to upstream, client: 10.10.10.1, server: web1.companyname.com, request: "GET / HTTP/1.0", upstream: "https://<WANIP>:443/", host: "web1.companyname.com"

I have added the following the end of /etc/security/limits.conf

nginx soft nofile 10000
nginx hard nofile 30000

I have added the following to /etc/sysctl.conf

fs.file-max=70000

...And rebooted. However, I'm getting the same problem every time.

Interestingly the IP address that appears in the log "176.58.124.134" I don't recognise and a quick google search suggests this is an abusive IP address.

Any tips, suggestions are grealy appreciated. Thanks.



Edited 1 time(s). Last edit at 02/10/2020 11:46AM by DDIT.