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https://issues.apache.org/jira/browse/TS-2054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13716579#comment-13716579
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Alan M. Carroll commented on TS-2054:
-------------------------------------

This was cause by a bad default value for TS-1487. This still is a problem in 
the case that

1) libcap is not used
2) traffic_server is started directly by itself.
3) http.wait_for_case is set and ATS waits for the cache

Fixing this would be challenging because currently the root UID is dropped at 
the end of proxy/Main.cc if libcap is not available. At that point sufficient 
privilege to open restricted ports cannot be regained. It is a sufficiently 
obscure case that I recommend moving this out or closing.
                
> traffic_server will not bind to a reserved port (<=1024)
> --------------------------------------------------------
>
>                 Key: TS-2054
>                 URL: https://issues.apache.org/jira/browse/TS-2054
>             Project: Traffic Server
>          Issue Type: Bug
>            Reporter: Phil Sorber
>            Assignee: Phil Sorber
>             Fix For: 3.3.5
>
>
> At some point after ea560ce I stopped being able to bind to port 80. It looks 
> like I can bind above port 1024 though. Perhaps we are dropping privs before 
> binding the port now?
> I used --enable-debug when configuring.

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