Hello Team, Recently after our Firefox browsers updated to version 69.0.3 (64-bit), we are unable to open some of our internal sites - the error received is Secure Connection Failed - PR_END_OF_FILE_ERROR. With other browsers like Chrome or Edge the issue is not presented - only with Mozilla. We tried creating new profile in Mozilla, checked the SSL and TLS settings of Mozilla also. Can you help us troubleshooting this ? Screenshot attached.
Modified by radostin.todorov
Additional System Details
Only the default for the browser ones.
- User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36
jamesafuf123 said] https://support.mozilla.org/en-US/questions/1264659#answer-1237475 my isp was blocking sites like that
The internal site was opening without problems - in Mozilla, before the latest update of the browser. And as I described - its opening without problem in other browsers - that makes me think that the ISP maybe has nothing related with the issue ?
Did you check out the Bing link?
This usually means that Firefox wasn't able to find a cipher suites to use to connect to this server and reached the end of the list. There can be two possibilities: one is that the server is outdated and doesn't support modern cipher suites, another might be that the server only supports a few cipher suites and Firefox doesn't support any of these.
You can check your browser and possibly compare this with the server setup..