Apache Traffic Server

Via Header Decoder

Parse and understand Apache Traffic Server Via headers

Note: Paste the via code or the entire Via header line. All Traffic Server via formats are accepted, including pre-8.0 headers and partial codes. The command line tool traffic_via can also decode these.

Via Header Format Reference

The Via header in Apache Traffic Server encodes information about how the proxy handled the request. Extended via headers (22 characters) provide detailed information in the format:

[client-info][cache-lookup][server-info][cache-fill][proxy-info][error-codes]:[tunnel][cache-type][cache-result][parent][server]

For more details, see the Via Header Documentation.