Configuring upstream proxy servers - Port Swigger
Summary: PortSwigger's documentation describes how Burp Suite can be configured to route outgoing requests through an upstream proxy server instead of connecting directly to the destination host. Upstream proxy rules are added when creating or editing a site or folder, Burp applies the first matching rule in the list, and it falls back to a direct, non-proxied connection when no rule matches.
What's compelling: The fallback to a direct connection when no upstream proxy rule matches means traffic can leave without passing through the proxy you intended, so a rule set that doesn't cover every destination host leaves a gap in the path you thought you controlled.
Read the original at PortSwigger Research ↗
- Topics
- Vulnerabilities & Patching
- Related
- Attackers Exploit UnrealIRCd Flaw That Enables Server-Level Command Injection Cyber Risks · Nov 14, 2026U.S. CISA adds Check Point and UnrealIRCd flaws to its Known Exploited Vulnerabilities catalog Cyber Risks · Nov 14, 2026PostgreSQL Patches 52 Flaws, Including 22-Year-Old Bug Enabling Authenticated RCE Cyber Risks · Nov 13, 2026