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How to use socat to transparently proxy terminal and forward traffic to Burp?

Anthony | Last updated: Jan 19, 2023 07:51PM UTC

Hello, I am using macOS and, I spent a week trying to figure out 'How to use socat to transparently proxy terminal and forward traffic to Burp?'. I followed the bellow tutorial which seems to logically work:, but it doesn't. " To transparently proxy terminal traffic on macOS with socat and forward it on port 80 to Burp Suite, you can follow this tutorial: Create a local port forward to redirect traffic from the local port 8080 to port 80 on the remote host: socat TCP-LISTEN:8080,fork TCP:remotehost:80 Configure Burp Suite to bind to port 8080 and to act as an HTTP/HTTPS proxy: Open the “Options” tab in Burp Suite. Select the “Connections” tab. Select “Bind to port” and enter 8080. Select “Act as an HTTP/HTTPS proxy”. To enable the transparent proxy, create an alias for the socat command: alias start-proxy="sudo socat TCP-LISTEN:8080,fork TCP:remotehost:80" Add the alias to your ~/.bash_profile or ~/.zshrc file. Now, if you type in a URL in the terminal, it will be redirected to Burp Suite. " There is something missing, I guess... Can you please help?

Liam, PortSwigger Agent | Last updated: Jan 20, 2023 05:08PM UTC

Thanks for your message, Anthony. Would it be possible to link us to the tutorial?

Anthony | Last updated: Jan 20, 2023 07:28PM UTC

Hi Liam, This is the tutorial: To transparently proxy terminal traffic on macOS with socat and forward it on port 80 to Burp Suite, you can follow this tutorial: Create a local port forward to redirect traffic from the local port 8080 to port 80 on the remote host: socat TCP-LISTEN:8080,fork TCP:remotehost:80 Configure Burp Suite to bind to port 8080 and to act as an HTTP/HTTPS proxy: Open the “Options” tab in Burp Suite. Select the “Connections” tab. Select “Bind to port” and enter 8080. Select “Act as an HTTP/HTTPS proxy”. To enable the transparent proxy, create an alias for the socat command: alias start-proxy="sudo socat TCP-LISTEN:8080,fork TCP:remotehost:80" Add the alias to your ~/.bash_profile or ~/.zshrc file. Now, if you type in a URL in the terminal, it will be redirected to Burp Suite.

Liam, PortSwigger Agent | Last updated: Jan 24, 2023 08:06AM UTC