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Combine stunnel and dante to provide TLS authenticated proxy with blocked private ip range

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anti-ssrf-proxy

Combine stunnel (https://www.stunnel.org/) and dante (https://www.inet.no/dante/) to provide TLS authenticated proxy with blocked private ip range.

Build

docker build -t anti-ssrf-proxy:latest .

Test

Create self-signed certificate:

openssl req -new -x509 -days 365 -nodes -out test/ssl-cert-snakeoil.pem -keyout test/ssl-cert-snakeoil.key

Run anti-ssrf-proxy

Proxy username is proxy_username password is configurable via PASSWORD env variable

If you want wrapped TLS add TLS=true env

If you want to disable authentication then use AUTH=false

docker run --rm -d -e PASSWORD=password -e TLS=true -v $(pwd)/test/ssl-cert-snakeoil.key:/opt/stunnel/privkey.pem -v $(pwd)/test/ssl-cert-snakeoil.pem:/opt/stunnel/fullchain.pem -p 1080:1080 sliteteam/anti-ssrf-proxy:latest

cd test
yarn install
NODE_TLS_REJECT_UNAUTHORIZED=0 node index.js

You should obtain:

Express listening at http://127.0.0.1:8888
Can get internal request without protection: {"ok":true}
Can get githubstatus with protection: All Systems Operational
Socks5 proxy rejected connection - NotAllowed

You can also try it using curl:

curl -x socks5://proxy_username:[email protected]:1080

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Combine stunnel and dante to provide TLS authenticated proxy with blocked private ip range

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