Imperva Web Application Firewall (WAF) vs. NGINX

If you are looking for a cheap product to meet the bare minimum requirements for PCI or any other compliance regulations, this is not the product. Also, the WAF portion only inspects on HTTP/HTTPS traffic which can be very limiting into other forms of web apps that utilize other protocols. The HTTP/HTTPS inspection that it does do is very in depth and well worth the investment.

Incentivized

Nginx is well suited for serving any static content - whether that be images, JS files, HTML files, CSS files, videos, etc. If you have a high-traffic website, Nginx will be a great fit because it handles large number of requests extremely efficiently. Nginx has full support on Unix systems, but only has limited support on Microsoft Windows machines.

Incentivized

• Alert Aggregation - Correlates different violations into perceived correlated attacks.
• Ease of deployment - as one of the only WAFs that allow bridge mode deployment, this can be deployed with without downtime and no Network Architecture modifications. If the need for proxy is required at a later time, Transparent Reverse Proxy can be deployed within seconds and minimal configuration.
• Custom Policies - Custom security policies are easy to configure.
• Reporting - There are a good amount of pre-configured reports available by default.

Incentivized

• Straight-forward configuration format that users of all skill levels can learn, and yet is powerful enough for the huge breadth of features that Nginx provides.
• Massive scale right out the box. We've never had a Nginx instance overwhelmed by requests, and if we did it would be trivial to spin up more Nginx instances to handle the load.
• SSL termination means that we can deliver content over HTTPS without needing our individual services to require TLS support. This saves us a lot of time and headache while keeping us secure.
• Nginx is open-source and free, meaning that anyone can use it to power their services, from individual projects to billion-dollar websites.

Incentivized

• The UI can use a little work (but is largely decent)

• Nginx often requires some initial configuration. It's worth doing, because you'll end up with great results, but it can be slightly daunting for someone to get started using it. Apache might have a leg up in that regard--When you install Apache, typically it's just about ready to do what you want already. But the issue with Apache is that most people skip the extensive tuning phase required after that, and with nginx it becomes more just a part of the configuration process.
• Sometimes, the configuration syntax, even though it's powerful and terse, isn't the most intuitive. Luckily there's plenty of documentation about what things mean and how to accomplish certain things. There may not be much that can be done about this--to have a powerful web server, you need a powerful-enough configuration language.
• The nginx brand is somewhat fragmented, and it can be confusing. There's the open source nginx web server, which I've primarily been referring to. But then there's NGINX Plus, a premium subscription-based service which works with a range of other NGINX products (NGINX WAF, NGINX Amplify, NGINX Controller). I've met a number of people who weren't very familiar with nginx, and instinctively went to nginx.com first, and from there it seems like everything costs money. It's only when they realize there's a different site, nginx.org, that they find what they went looking for.

Incentivized

Great value for the product

Incentivized

There are just a couple of points that are hard to find, that probably could be elsewhere. But these are minor; everything else is right where you'd expect it to be.

Front end proxy and reverse proxy of Nginx is always useful. I always prefer to Nginx in overall usability when you have application server and database or multiple application servers and single database i.e. clustered application. Nginx provides really good features and flexibility which helps the system administrator in case of troubleshooting and also from the administration perspective. Also, Nginx doesn't delay any request because of internal performance issues.

Incentivized

We haven't needed support from Imperva since implementation. But during that time, their personnel were very quick to respond to questions. Since then, it's been largely doing its thing for us (which is exactly what we'd hoped).

Community support is great, and they've also had a presence at conferences. Overall, there is no shortage of documentation and community support. We're currently using it to serve up some WordPress sites, and configuring NGINX for this purpose is well documented.

Incentivized

Ultimately, it was the easiest to work with that was still a "known" company (we've been burned too many times by up-and-comers). We needed something that gave us a lot of control but then didn't need its handheld on a daily basis. Imperva gives us a lot of that and we are still able to navigate it with ease.

I have found that [NGINX] seems to perform better throughout the years with less issues although I've used Apache more. I would definitely recommend [NGINX] for any high volume site and I've seen this to usually be the case from most provided web hosts who will pick [NGINX] over alternatives

Incentivized

• Our on-prem firewall has less work to do, allowing it more cycles for other tasks.
• We have better web traffic visibility and control over what actors are doing outside our network.

• When we first migrated our primary bidding environment architecture to Nginx, it was under duress due to Apache's inability to keep up when we consolidated away from an HAproxy model to a central HTTP proxy. So we even when we did not know what we were doing, we were able to make it work in a bad situation, and everyone was quite happy.
• The biggest complaint I have is that I find the module compilation requirements for nginx+ rather burdensome. If we pay for Nginx+, I'd love to see then have pre-built modules for ready for each release of more modules. We are spending our own time engineering an in-house solution for module testing for nginx+ releases, which is disappointing.
• I've also, as the primary Nginx person at my organization, inserted my expertise into other projects, and have saved our company lots of money getting rid of big $$$ appliances for general SSL proxying.
• Speaking of Nginx replacing SSL appliances, we had an instance where we had to suddenly enable elliptic-curve SSL ciphers and our big $$$ appliances (you know who they are), were falling over. Even their SSL accelerator cards, after all, are just a few extra cores to process SSL. But in an environment of our size, we use DNS to spread the load to hundreds of frontend proxies with dozens of cores each to spread this load out, all at a lower price than ONE of the appliance pairs running Nginx. We couldn't even tell the change in load in our Nginx architecture when we enabled the ciphers.