In order to fully utilize BlazeMeter from behind your firewall, you may need to whilelist some addresses in order to prevent connection issues. What you need to whitelist depends on what you're trying to do, so this article serves as a mater guide to point you in whichever direction you need to go.
BlazeMeter's own URLs are not associated with static IP addresses; rather, our IPs change periodically. That means if you need to whitelist our URLs, you must whitelist by URL instead of by IP address.
Our URLs include:
BlazeMeter cloud engines can be whitelisted using the IP ranges of our engine providers. Check out our guide Whitelisting BlazeMeter Engines for full details.
If you'd like an alternative to whitelisting the IP ranges of our public engines, then check out our blog article Top 3 Options for Running Performance Tests Behind Your Corporate Firewall.
If you elect to setup your own On-Premise Locations (OPLs) -- what we call on-premise agents or engines that you setup yourself -- you'll need to know everything that must be whitelisted to allow that OPL to function, all of which is detailed in our On-Premise System Requirements guide.