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Collaborator Polling Doesn't Work

Zezul | Last updated: Dec 24, 2021 06:27PM UTC

I use a VM for BurpSuite, and Collaborator, on default configurations, is working very strangely. I am unable to access the created domain inside the VM, but I am able to access it outside (such as on my host machine). The polling function doesn't work and instead I receive the following error message: "The Burp Collaborator server used by the Burp Collaborator client is not reachable, change the settings to use this feature." When running a health check, I receive the following: Server address resolution Success Server HTTP connection Warning Server HTTPS connection (trust enforced) Warning Server HTTPS connection (trust not enforced) Warning Server SMTP connection on port 25 Warning Server SMTP connection on port 587 Warning Server SMTPS connection (trust enforced) Warning Server SMTPS connection (trust not enforced) Warning Polling server address resolution Success Polling server connection Error No connections to dyfh0jc3a39ksdbwm4u6z006wx2agt0b4et.burpcollaborator.net could be opened. The collaborator may still work, as long as the server under test can connect to this port. No connections to the polling server at polling.burpcollaborator.net could be opened. The collaborator will not work in this configuration. I use openjdk 13, but this same problem happened with version 11 and 14. I'd really appreciate any help!

Matt | Last updated: Dec 28, 2021 06:01PM UTC

Same issue here.

Liam, PortSwigger Agent | Last updated: Dec 29, 2021 08:26AM UTC