Ron Barber created TS-2530:
------------------------------

             Summary: False positive detected for Multi-Hop cycle when using 
private IP
                 Key: TS-2530
                 URL: https://issues.apache.org/jira/browse/TS-2530
             Project: Traffic Server
          Issue Type: Bug
          Components: Core
            Reporter: Ron Barber


With hosts A and B running ATS where both hosts have private IPs (10.0.0.1 & 
10.0.0.2) AND have a local loopback which have a public IP 27.1.1.1 we are 
getting HTTP/1.1 400 Multi-Hop Cycle Detected when host A forwards a request to 
host B.

ATS searches the incoming Via header for its own ip address 
(Machine::instance()->ip_hex_string) to determine if the request has been 
forwarded back to itself.

Cause: ATS is selecting the public IP address of the server to insert in the 
Via header (even if it's not on a routable interface).



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