What is the recommended WAF to run in-front of Discourse? I recently succeeded in modifying the nginx config installed in the Discourse docker container to include ModSecurity and the OWASP (Open Web Application Security Project) CRS (Core Rule Set). https://www.modsecurity.org/crs/ So far my te…

A note about why WAFs are important: they provide broad protection against 0days not only from the web application, but also its entire stack of dependencies of the web app. It’s been pointed out to me that the Discourse team has a bug bounty program, which is great! HackerOne …but, of course, t…

related: I just found this guide from @joelradon on how to install Discourse with the NAXSI WAF in nginx before the Discourse docker container: How to build a Discourse Installation with an Open Source WAF

It’s no more supportable than what you’re asking above. If it helps I can add an unsupported tag there too?

I think the desire for some magic device that auto mitigates issues is somewhat misguided in the Discourse setup. We have a bounty program, we patch issues in Discourse within hours of when they are reported. Sites run tests-passed by default which in today’s case contains commits from today. Sure …

I was successfully able to persist my nginx ModSecurity config changes across launcher rebuild app runs as follows: First, we update the local copy of install-nginx that came from the discourse_docker repo and is cloned to /var/discourse/. cd /var/discourse/image/base cp install-nginx install-ngin…

I do agree with you that ModSecurity or similar WAFs are not a golden bullet. But I know (at least?) one vulnerability that was found in RoR which affected Discourse that would have been mitigated by a ModSecurity-like mechanism. When we were patching this we saw in our logs that it had been used …

I liken WAFs to signature-based virus scanners which IMO are not very useful in environments with a limited attack surface (e.g. your non-Windows servers) They’re not going to catch everything but they will (in theory) catch common patterns of attacks (e.g. SQLI) and known exploits (e.g. the RoR vu…

Discourse + 웹 애플리케이션 방화벽 (WAF) mod_security

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codinghorror (Jeff Atwood) 11월 17, 2019, 6:27오후 3

This is a bad idea and it is not recommended. The benefit of this type of thing for a JavaScript app is extremely limited and it adds significant complexity to your hosting setup.

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ModSecurity exceptions Support	5	736	8월 8, 2019
Cloudflare Security WAF (Web Application Firewall) + Discourse? Support	1	539	6월 25, 2025
How to run Discourse in Apache vhost, not Nginx Self-hosting unsupported-install	28	2710	11월 17, 2019
How to build a Discourse Installation with an Open Source WAF Self-hosting unsupported-install	1	1887	10월 5, 2019
Akamai WAF configuration and false positive Support	2	199	3월 31, 2025

Discourse + 웹 애플리케이션 방화벽 (WAF) mod_security

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