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FIX UNKOWN HOST

joneskla | Last updated: Jan 10, 2021 01:19PM UTC

hi, i've been having UNKOWN HOST ISSUE FOR LIKE 5MONTHS WTH?, burp works for 30mins then boom unkown host until like the next day, i tried the following, RE-INSTALLING BURP RE-INSTALLING FIREFOX TRIED 4 DIFFERENT BROWSERS RE-INSTALLED THE CERT MULTIPLE TIMES CHANGED NETWORK TRIED EVERYTHING

Ben, PortSwigger Agent | Last updated: Jan 11, 2021 09:22AM UTC

Hi, The Unknown Host error is usually indicative of Burp not being able to resolve the domain name into an IP address. To clarify, do you get this with every site that you are trying to access with Burp or just one (or a few) site in particular? In addition, are you using a LAN proxy in order to access the internet on your environment?

joneskla | Last updated: Jan 11, 2021 02:25PM UTC

I get unkown host on every website for proxy i configure it 127.0.0.1 in firefox proxy settings

Ben, PortSwigger Agent | Last updated: Jan 11, 2021 03:57PM UTC

Hi, As noted in my initial message - are you using a LAN proxy (this is separate from the Burp proxy) to access the internet in your environment (these are normally in place in corporate environments)?

joneskla | Last updated: Jan 12, 2021 01:28PM UTC

no i'm not using lan proxy i guess?

Ben, PortSwigger Agent | Last updated: Jan 13, 2021 10:42AM UTC

Hi, Are you able to connect to any sites using just the IP address? In addition, are you able to successfully perform DNS lookups on your machine to the sites that you are trying to reach?

joneskla | Last updated: Jan 18, 2021 11:29AM UTC

everything works fine, if i turn of proxy in firefox the site works well, but when i turn the proxy back on in firefox, burp will start showing unkown host

Ben, PortSwigger Agent | Last updated: Jan 19, 2021 09:12AM UTC

Hi, Are you able to send us an email at support@portswigger.net and include some screenshots of the settings that you have configured within Burp and in your proxy settings so that we can see how you have this setup?

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