[jira] [Commented] (TS-938) Our outgoing (request) Via: header seems to always default to 127.0.0.1 as the IP identifier

["Alan M. Carroll (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13094169#comment-13094169 ] 

Alan M. Carroll commented on TS-938:
------------------------------------

According to the W3 spec (RFC2616 14.5)VIA headers should accumulate. We should check that

1) We accumulate them as required by the RFC.
2) We check the accumulated headers for a cycle.

> Our outgoing (request) Via: header seems to always default to 127.0.0.1 as the IP identifier
> --------------------------------------------------------------------------------------------
>
>                 Key: TS-938
>                 URL: https://issues.apache.org/jira/browse/TS-938
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: Network
>    Affects Versions: 3.1.0
>            Reporter: Leif Hedstrom
>            Assignee: Alan M. Carroll
>             Fix For: 3.1.1
>
>
> This can cause serious problems, because if the other end is also an ATS server, also defaulting to thinking it's on 127.0.0.1, will treat this as a loop, and send a 400 response.
> We ought to try to send something more intelligent as the hex-IP in the request Via: header. This is particularly problematic when ATS is used as a forward (or intercepting) proxy, and have outgoing Via: headers enabled.

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