Questions tagged [nginx]

nginx [engine x] is an HTTP and reverse proxy server, written by Igor Sysoev

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1answer
63 views

URL rewrite spoofable

I am considering using URL rewrites in kubernetes nginx proxy to publish selected context paths in microservices which are run in a cluster running internal services. For example https://public....
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what kind of attack is this

Im developing a website on test server and so when debugging some stuff I had to look in access log, this is a small chunk of what I saw: 37.99.49.203 - - [13/May/2019:17:51:34 +0200] "H\x1E\xF3qxZ\...
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0answers
168 views

Malicious PNG (html with png header)

I found following security notice on Django website: Django’s media upload handling poses some vulnerabilities when that media is served in ways that do not follow security best practices. ...
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5answers
11k views

What exploit are these user agents trying to use?

I just looked at my user agent tracking page on my site (archived on Yandex) and I noticed these user agents. I believe they are an attempt to exploit my server (Nginx with PHP). The 1 in front of it ...
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1answer
132 views

Is my server under some kind of reconnaisance/attack?

Recently, I started up nginx on an Amazon EC2 instance. After a day, I started seeing these messages in my log. Some client keeps trying to call /add and /health.html on my server. I don't have those ...
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1answer
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Is it a security risk to run master process of nginx as root?

I'm using nginx (Port 8888) as a reverse proxy for my web server running over 8080. In the traditional way, nginx master process runs as root and spawns the child processes with user www-data. Is it ...
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2answers
106 views

Are my letsencrypt ssl ciphers strong enough?

I have these settings for my certbot certificate on my nginx virtual host. Is this complete or secure/valid? someone mentioned something about unsecure ciphers v1.2 or something ## SSL ...
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2answers
116 views

Security best practises for my first ever Node, Mongodb, Nginx production app on a Ubuntu VPS

So as the title says I'm just deploying my first ever app in production. Because I don't have experience, I was told to ask someone who knows this stuff. So how should I ensure the best security for ...
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1answer
312 views

Nginx: mod-security rule for http slow DoS attack

The only related rule in mod-security for slow DoS is modsecurity_crs_11_slow_dos_protection, and it's for Apache only. Is there a rule for Nginx?
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1answer
108 views

NGINX 444 response equivalent for Apache server

How can I configure Apache HTTPD server to send no response and close connection in case of DDoS or malicious request
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1answer
132 views

I'm moving my website to a new server, what implications does this have for my SSL certificate?

I run a website which I serve over https and https only (add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload";) The ssl certificate I bought came from namecheap.com, ...
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1answer
250 views

Suspiscious HTTP request to nginx server in server log, what is it?

I have an nginx server running an instance of and express/nodejs server. I was going through the logs to see what was being requested, and I noticed a few normal attempts for common flaws in things ...
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1k views

Help on what to do with these suspicious logs

Just set up my first linode server this last Wednesday, and today I tried to take a look on the nginx access logs, and found this suspicious logs. 47.96.15.13 - - [28/Jul/2018:14:54:05 +0800] "GET /...
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1answer
87 views

Two certificates with HSTS on different ports?

Is it possible to set up Nginx in such way, that on the same domain it will serve on two different ports, two different valid certificates both with HSTS? Certificates are from different CA and for ...
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2answers
557 views

Should we enable TLS on backend connection after reverse proxy? [duplicate]

I have a reverse proxy (e.g. nginx, nghttpx, haproxy) that proxies connection to a service running on the same physical server. I think the most common way to configure this setup is to enable TSL ...
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42 views

How to maintain sensible cipher list for a public webserver [duplicate]

I'm configuring nginx and am trying to find a cipher list that gives an A standard over at SSLlabs while also allowing common browsers to access the website. I am not an expert and am asking this ...
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2answers
239 views

What are the potential vulnerabilities of allowing a large http body size?

With NGINX and PHP I am allowing 5GB files to be 'uploaded' to my server although they will not be downloaded unless they are 'legitimate' (that is for another question ;)). I was wondering is this is ...
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1answer
214 views

How to set basic defense on Nginx-CMS?

As an Information Security amateur I did all in my might to protect my Ubuntu-Nginx-CMS (WordPress) environment from BFAs, MITMs, and database injections. sudo add-apt-repository ppa:certbot/certbot -...
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2answers
3k views

Turned on cgi.fix_pathinfo still “dangerous” in Nginx?

In this article in digitalocean.com Justin Ellingwood recommends to turn off cgi.fix_pathinfo: Inside, we need to find a section that configures the cgi.fix_pathinfo behavior. It will be ...
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1answer
418 views

s_client custom ciphersuite with nginx reverse proxy fails

I have compiled openssl 1.0.1u (yes, i know its old one) with my custom ciphersuite (ECDHE-RSA-MYCIPHER-CBC-SHA) with openssl for a research project; it has compiled and installed successfully. When I ...
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2answers
473 views

How to integrate client certificates for upstream servers with nginx as reverse proxy?

For my private VPS, I am building a configuration for different web applications (Owncloud,...) which depends on a combination of different Docker containers. At the front, I would like to use an ...
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1answer
698 views

Some bot keeps posting this to my server

Some bot keeps posting strings like this to my server. What do they mean and what's the best way from preventing them? RaxfkI/...
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2answers
169 views

My own simple web server + nginx as a reverse proxy

Say I've created my own web server from scratch. Very-very simple and vulnerable. I'm going to use it in production. Despite it being vulnerable, will it be feasible to run it with nginx and configure ...
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1answer
207 views

Wordpress site hack attempt

I found some thing upnormal in my nginx server log. 74.208.235.132 - - [06/Oct/2017:03:36:20 +0000] "POST //%63%67%69%2D%62%69%6E/%70%68%70?%2D%64+%61%6C%6C%6F%77%5F%75%72%6C%5F%69%6E%63%6C%75%64%...
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1answer
625 views

Trying to do a chunked multipart post request, nginx and php both returns 400 error

I'm trying to use chunked protocol and multipart protocol in a POST request, like this All new-line symbols are \r\n, e.g POST http://127.0.0.1/print.php?a=1&b=2 HTTP/1.1 accept-language: * ...
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2answers
2k views

Directory traversal in a URL?

Scenario: I have a webserver running nginx. I have my html files in /var/www/ and pictures in /var/www/pictures/ However, I also have some secret pictures in /var/www/pictures/secretpics/ which I ...
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1answer
531 views

Is using X-Real-IP as a way to check for localhost access safe?

I have an application listening on the port 5000 that can be accessed to the internet through nginx with this configuration: upstream myapp { server 127.0.0.1:5000; } server { listen 80; ...
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1answer
105 views

Must one have SSL certificates for each domain, to use HTTPS? [duplicate]

I read in the following passage in this DigitalOcean article, concerning HTTP/2: Even though HTTP/2 does not require encryption, developers of two most popular browsers, Google Chrome and Mozilla ...
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1answer
3k views

CVE-2017-7529 - Exploit details? [closed]

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7529 Where can I find the exploit details for this CVE? Usually sites like exploit-db.com include the PoC exploit for a given vuln but I can't ...
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1answer
76 views

what does these unknown request_uri values against my nginx web server mean?

I built a web application with low traffic so far, after making some advertising I realized there are some suspicious requests against my server, this is what Loggly service shows me in panel: Logs ...
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3answers
8k views

What can I do after an attack to our system that hit our login route?

This morning I checked our nginx logs. 46.x.x.90 - - [17/Jul/2017:05:51:31 +0000] "HEAD http://x.x.71.1:80/PMA2011/ HTTP/1.1" 301 0 "-" "Mozilla/5.0 Jorgee" "-" 46.x.x.90 - - [17/Jul/2017:05:51:31 +...
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1answer
149 views

What are methods against code leakage for web applications?

I like to see the server-side web application layer as independent as possible, from the OS, from the server software like (Apache, nginx, IIS, et cetera). In order to easily grab the application and ...
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1answer
103 views

Cloudflare cipher selection based on AES-NI support

How does Cloudflare selects AES ciphers on devices with AES acceleration and ChaCha on devices without it ?
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1answer
514 views

Connection timeout error using HTTP Status Code Checkers on a website [closed]

PROBLEM When I use online tools to test www.bestbuy.com URL's, I get a timeout connection error. By online tools I mean HTTP Status Code Checkers or Redirection Checkers. EXPECTED BEHAVIOUR I ...
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2answers
279 views

Value of using passphrase on private key

I am implementing HTTPS with Nginx and I generated private key with passphrase. Now I wonder what is the practice in production environment, using unprotected keys or protected with ssl_password_file ...
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0answers
417 views

user permissions and nginx with git hook for deployment

So I am trying to set up a webserver which will use nginx to serve a static site (for now). I set up a git repo that I want to push to in order to make deployment easy (using this guide: https://www....
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1answer
1k views

Is it possible to configure TLS/SSL in Nginx without persisting the private keys on disk?

When you configure TLS in Nginx via ssl_certificate and ssl_certificate_key, you have to provide the keys as files. From my understanding it is generally best practice to avoid keeping private keys ...
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1answer
468 views

Proxy not rejecting illegal host header when coming from my VM provider's network

I have a django app hosted on a linode VM, proxied by nginx on that same VM. In my nginx config I have a block to deny bad host header requests: ## Deny illegal Host headers if ($host !~* ^(mydomain....
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2answers
1k views

HTTPS and Basic Auth

I've set up an NGINX reverse proxy on my home server with dynamic DNS from my website 'stuff.mydomain.com' along with a certificate from letsencrypt. I'm using basic auth to authenticate users. When ...
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4answers
2k views

Dealing with SSL Certificates on Products

We are developing a product (device / system) that will be installed on customer sites. Many of our customers will (should) be concerned about security, and should be thinking about it seriously. Our ...
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1answer
390 views

Protecting web site with nginx 301 redirect and HTTP firewall

I am setting up a hobby web site and trying to make it as secure as possible. The backend is nginx + uwsgi. I have set up the HTTPS connection. For non-SSL requests, I have the following rules in ...
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1answer
162 views

HTTPoxy - What about HTTPS_PROXY when dealing with HTTPoxy vulnerability?

fastcgi_param HTTP_PROXY ""; is the soluntion, but why didn't they also mention HTTPS_PROXY? I have a HTTPS website, not HTTP. Should I also add fastcgi_param HTTPS_PROXY ""; or not? Stop changing ...
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1answer
2k views

XSS protection header for firefox

I have enabled XSS protection in server using nginx with below header. But After long research google chrome, IE 10 & above and safari supports that but Firefox doesnt support add_header X-XSS-...
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1answer
428 views

Nginx fallback SSL for one domain

I have a Debian server running Nginx under a domain, and I have 2 different SSL certificates, from different authorities. Is it possible to configure Nginx in a way to serve one SSL certificate, but ...
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1answer
816 views

Nginx Form-base Authentication

I want to have nginx in front of my Tomcat and to act as a authentication gateway. So if request is not authenticated in will be redirected to login form that will also be stored on nginx. nginx will ...
2
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1answer
589 views

What is proxyjudge.info?

I have setup a nginx server literally an hour ago. It is open to the world but is not in production. There is no CNAME or other DNS records associated with the server's IP address yet. In the ...
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2answers
118 views

Mediawiki/Nginx/Php on Ubuntu 14.04 is being attacked

I had a personal wiki set up with mediawiki on my server with nginx. Recently I noticed that all my sites that used php (Mediawiki and all Wordpress sites) were not responding or timing out. Then I ...
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0answers
497 views

nginx request redirected

I've noticed in my nginx access.log entries like this: XX.XX.XX.XX - - [05/Jan/2017:00:21:43 +0100] "GET / HTTP/1.1" 301 178 "-" "libwww-perl/6.05" This is weird because i've implemented GeoIP ...
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1answer
53 views

Should a webserver's access to certain directories be limited?

There was a security update to Roundcubemail today and I just patched my web/mail -server. Within the update files, there was some recommendations to restrict webserver's access to certain directories....
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0answers
2k views

Anyone can identify tool used to perform this attack?

recently I've identified that some hack attempt was performed at one of my servers. I have dumped nginx logs to github, please take a look and try to identify which tool was used to perform this ...