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Is having a base64-encoded string inside a User-Agent normal or unusual? Digging though the list of User agents at WhichBrowser. It is reasonable to conclude that this is rare, but possibly the result of a malware infection. However I also abused this behaviour to add another security layer to my own site in the past, where only a few clients with a ...


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If all other traffic from this IP address is legitimate, then I wouldn't worry about the WAF rule being triggered. It doesn't decode into a human readable string. So it was likely inserted by a proxy device for tracking purposes. Regarding your concern about the RFC, they're written as a recommendation for how the field should be used though there is little ...


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Doing a check online has come across this user agent string on the site closetnoc.org. This user agent was identified as being one of a number which have been traced to a single IP address 192.185.1.20 which has been flagged as a spammer by list.quorum.to, bl.csma.biz, and spamsources.fabel.dk. To block access to this IP (and in turn to that User-Agent)... ...


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I have noticed this on occasion as well. Can't place my hands on the information I had at the time but from what I was able to find it appears to be something like a build number of release candidate number which has been appended on the end of the browser version. From what I have been able to find this is not a danger and is simply a relic from development ...



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