What does the user agent tell you?
The User-Agent (UA) string is contained in the HTTP headers and is intended to identify devices requesting online content. The User-Agent tells the server what the visiting device is (among many other things) and this information can be used to determine what content to return.
Why does Mozilla user agent start?
Internet Explorer is released. It spoofs Netscape by starting its User-Agent with Mozilla/ because web servers were routinely browser sniffing and serving pages with frames – a feature supported by both Netscape and IE, but not other browsers of the era – to Netscape only.
What is client user agent?
A User Agent Client (UAC) is a Session Initiation Protocol (SIP) or Voice over Internet Protocol (VoIP) application that serves as a peer-to-peer (P2P) communication gateway and generates distributed network service requests. A UAC is a network server, email client, search engine or Web browser.
What is user agent example?
Browsers like Mozilla Firefox, Google’s Chrome as well as Safari and Opera are examples of user agents. However, other applications can also act as user agents. Examples are: Crawlers: Googlebot, Yahoo!
What is user agent spoofing?
In user-agent spoofing, bad actors modify elements of the user agent string to obfuscate details of their traffic. For example, making high traffic volumes from a single device look like lots of individual advertising engagements from multiple devices.
How reliable is user agent?
User agent is 100% fallible and you should not rely on it for anything useful. Yes its reliable for non hacker user.
Is the user agent unique?
User-Agents also provides one of the data points for fingerprinting users without the use of cookies. It’s included with every HTTP request and can potentially be very long and unique to a user in certain uncommon situations.
What is SMTP user agent?
A Mail User Agent (MUA), also referred to as an email client, is a computer application that allows you to send and retrieve email. MUAs are the component within the Simple Mail Transfer Protocol (SMTP) system responsible for creating email messages for transfer to a Mail Transfer Agent (MTA).