Quarantyne is a reverse-proxy that protects web applications and APIs from fraudulent behavior, misuse, bots and cyber-attacks in real-time.


  • Java 8


It is a reverse-proxy written in java. It fronts a web application or API and protects it from fraudulent behavior, misuse, bots and cyber-attacks. It cannot stop them all, but it will definitely make it harder and more expensive to perform.

It’s like a firewall but smarter, because it does not just block traffic because the user-agent is not in a whitelist. It also performs deep request inspection to detect if, for example, the password used has been compromised before, or if the email is disposable, with minimal configuration and no changes in your application. Our coverage section precisely lists what it can identify.

Also Read – Salsa Tools : ShellReverse TCP/UDP/ICMP/DNS/SSL/BINDTCP & AV Bypass, AMSI Patched


Wide coverage of common HTTP threats and misuse

See coverage for a complete list of the threats and misuse it can identify and stop.

Deep traffic analysis

It performs deep inspection of web traffic going to your application to verify that the data being sent is not compromised or junk.

Generic integration

It adds extra HTTP headers to the request it proxies to your service. For example, an HTTP request coming from AWS will bear the following headers:

  • X-Quarantyne-Labels: PCX
  • X-Quarantyne-RequestId: 08a0e31a-f1a5-4660-9316-0fdf5d2a959d

Active protection

It can be configured to stop malicious requests from reaching your servers, avoiding wasting computing/DB/cache resources, metrics skew, junk data… See (Passive vs Active)[#passivevsactive].

Metrics & health reporting

It binds to an internal adminPort, where metrics (latencies, success rate…) as well as the health of the proxy are reported.

Privacy friendly / GDPR compliance

It is offline software. It runs inside your private network and does not communicate over the Internet with anyone to share data about your traffic, your business, or your users.

Ops Friendly

Single jar with 0 dependencies. Metrics are available on [proxyHost]:[adminPort]/metrics. Service health is available on [proxyHost]:[adminPort]/health


It is able to detect the following threats and misuse.

LBDLarge Body DataOverload target’s form processor with POST/PUT request with body > 1MByes
FASFast BrowsingRequest rate faster than regular human browsingyes
CPWCompromised PasswordPassword used is known from previous data breach. Possible account takeoveryes
DMXDisposable EmailEmail used is a disposable emails serviceyes
IPRIP Address RotationSame visitor is rotating its IP addressesno
SHDSuspicious Request HeadersAbnormal HTTP Request headersyes
SUASuspicious User-AgentUser Agent not from a regular web browseryes
PCXPublic Cloud ExecutionIP address belongs to a public cloud service like AWS or GCPno
IPDIP/Country discrepancyCountry inferred from visitor IP is different from country field in submitted requestno
SGESuscpicious GeolocationThis request is not usually received from this geolocation. Possible account takeover.no

Passive vs. Active

Passive Mode

It lets you decide how you want to handle requests it flags. Quarantyne’s default configuration is to NOT block tainted traffic. This traffic will make its way to your server and will be labelled as such via HTTP headers.

Passive mode is the recommended way to get familiar with it and to get a sense of what’s going on inside your web traffic. In your application, log or plot the incoming Quarantyne labels and you might be surprised (or not) by what you find!

Active Mode

In active mode, Quarantyne prevents tainted traffic from reaching your application. Blocking happens only you configure explicitely Quarantyne to do so. The configuration section explains how traffic blocking can be enabled.


Two complementary configuration systems are used: command-line arguments and an external (local or remote) JSON configuration file.

Command-line arguments

Run the following command to display the help and what arguments are available

$ java -jar quarantyne -h
Usage: [options]
internal ip:port where to access admin, UI and metrics. Optional
Optional URL or local path to a Quarantyne JSON configuration file
HTTP destination where Quarantyne forwards annotated web traffic.
Default: http://httpbin.org
–help, -help, –h, -h
Display help about available configuration arguments
Default: false
ip:port of inbound web traffic.

The --config-file is an optional JSON configuration file that tells Quarantyne how requests to your service are structured. It enables deep traffic analysis and increase coverage.

Traffic config JSON file

The traffic config file is optional and can either be an absolute local path or a remote HTTP(S) URL to a JSON file containing a single JSON object with the following structure. Describing the structure of your HTTP requests helps Quarantyne perform deep inspection of critical data such as password, emails or countries.

“login_action”: {
“path”: “/anything”,
“identifier_param”: “email”,
“secret_param”: “password”
“register_action”: {
“path”: “/anything”,
“identifier_param”: “email”,
“secret_param”: “password”
“email_param_keys”: [“email”, “contact[email]”],
“country_iso_code_param_keys”: [“country_code”],
“blocked_request_page”: “https://raw.githubusercontent.com/AndiDittrich/HttpErrorPages/master/dist/HTTP500.html”,
“blocked_classes”: [“all”]

Quarantyne is able to parse payloads submitted via POST/PUT with a Content-Type of application/json or application/x-www-form-urlencoded.

Root properties are optional.

*_actionPOST/PUT data payloadlogin_action describes the data structure sent when logging in. register_action defines the data structure sent when registering / creating an account.
*_action.pathPath where data is submittedMust start by /
*_action.identifier_paramForm/JSON key name where the user identifier is sent
*_action.secret_paramForm/JSON key where the user password is sent
email_param_keysForm/JSON key where email addresses are sent
country_iso_code_param_keysForm/JSON key where country iso codes are sent
blocked_request_pageHTTP response to return when blocking a requestIt’s better when this looks like a legit page/error as to not tip off the attack. Even better if you can inject fake data 🙂
blocked_classesAn array of attack classes to block.[] is equivalent to passive mode. ['all'] stops every class of attack Quarantyne can detect. See coverage

Quick run

Hosted demo

Available at https://demo.quarantyne.com/. In this scenario, Quarantyne is fronting httpbin.org in passive mode. Threats and misuse sent will be flagged via HTTP headers so querying https://demo.quarantyne.com/headers or https://demo.quarantyne.com/anything is a good start to see what’s going on. Hint: start simple, start with curl.

Run the jar

Quarantyne ships as a single 0-dependencies executable jar. Download a release and run:

$ java -jar quarantyne.jar

Build from source

Clone this repo or and run the following

$ ./gradlew run

You should see the following:

  • “2018-11-28T22:25:17.152-0800” [main] INFO com.quarantyne.proxy.Main – <= quarantyne => http://httpbin.org:80
  • “2018-11-28T22:25:17.223-0800” [main] INFO com.quarantyne.proxy.Main – see available options with –help
  • “2018-11-28T22:25:17.234-0800” [main] DEBUG com.quarantyne.proxy.Main – ==> event loop size is 8
  • “2018-11-28T22:25:17.234-0800” [main] DEBUG com.quarantyne.proxy.Main – ==> detected 4 cpus core
  • “2018-11-28T22:25:17.496-0800” [main] INFO com.quarantyne.config.ConfigRetrieverOptionsSupplier – remote configuration file found at https://s3-us-west-2.amazonaws.com/releases.quarantyne.com/quarantyne.test.json

You are all set! By default, Quarantyne starts on, and proxies traffic to http://httpbin.org.

Send a few requests to via various means. If fraudulent behavior is detected, you should see X-Quarantyne-Label HTTP headers in the request receive by your application. Hint: try with curl.