General | HTTP Proxies (8) | Cycubix Docs

Manually Setting Up a Proxy

For a developer working with local web servers (e.g., testing a web application on localhost), it's crucial to bypass the proxy to avoid unnecessary network routing and potential issues with proxy configurations affecting local development.

To use Burp or if running the browser through ZAP isn't working, additional configuration is necessary. Recent Chrome and Firefox versions no longer proxy localhost traffic by default.

Option 1: Change settings of your browser

• To proxy localhost (and related addresses) with newer Firefox versions (>= 67), the preference network. proxy.allow_hijacking_localhost (accessible through the about:config page) must be set to true.

• To proxy localhost (and related addresses) with newer Chrome versions (>= 72) the command line argument --proxy-bypass-list=←loopback> must be provided.

Option 2: Use www.webgoat.local

• Use the hostname of your machine instead of localhost. You can find or add a hostname in /etc/hosts on Linux and MacOSX and C:\Windows\System32\drivers\etc on Windows

Then in your browser, use http://www.webgoat.local:8080/WebGoat as the address.

Configure browser to use proxy

To manually configure a proxy in the browser, follow one of the configurations below:

Firefox Proxy Config

• Go to your Firefox Preferences (Mac, Linux) or Options (Windows) from the menu.`

• Select Advanced on the left

• Select Network in the Advanced Pane

• Click Settings

• Select Manual proxy configuration

input 127.0.0.1 as the proxy (or www.webgoat.local depending on the choice you made above)

input 8090 as the port if running WebGoat locally, and you updated ZAP to 8090 (otherwise, use 8080)

check the Use this proxy server for all protocols checkbox

Chrome Proxy Config

• Bring up Chrome’s settings from the menu

• In the Search settings box, type in proxy and hit Enter/Return. This should bring up the Network heading with a Change proxy settings button.

• Click the Change proxy settings button

• Select the proxies tab

• Select Web Proxy (HTTP)

• Input 127.0.0.1 (or www.webgoat.local depending on the choice you made) in the first box under Web Proxy Server and your port # (8090 if running WebGoat locally, otherwise 8080) in the second box (to the right)

• You may also want to clear the Bypass proxy settings for these Hosts & Domains text input at the bottom but shouldn’t need to

(Mac config image above)

(Win config image above)