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Invalid client request received: Failed to parse first line of request.

Chu | Last updated: Mar 01, 2016 06:31AM UTC

Hi, I received the message "Invalid client request received: Failed to parse first line of request." and "Unknown host: null" in the alert tab when I use SOCKS proxy. All the requests can't go through. If I uncheck the "Use SOCKS proxy" box, all requests can go through burp. I need to use SOCKS proxy so that all the requests made will come from the same company IP. How can I solve this and make it works? Thanks

PortSwigger Agent | Last updated: Mar 01, 2016 10:21AM UTC

Is it possible you've misconfigured your upstream proxy settings, and the upstream proxy connection is actually coming back to the local Burp Proxy listener?

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