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Frankly, I would say something else changed as well during that config. 
Mechanically, xrd.tls and xrd.tlsca are treated **identically** to their 
http counterparts as this is simply syntactic sugar to have a consistent 
config file. I should also mention the http versions are deprecated and 
will be removed at some point in the future.

On Thu, 8 Sep 2022, Luke Kreczko wrote:

> After exchanging configs, we removed the `xrd.tls` and `xrd.tlsca` from the redirector and replaced them with the `http.cadir`, `http.cert`, and `http.key` settings.
> This seems to have decreased our FTS transfer failure rate from ≈94% to ≈38% (in the last two hours).
> The mentions of `fts-cms` in `/var/log/clustered/xrootd.log` in redirector vs server have improved as well (more getting through).
>
> So the [updated config](https://github.com/BristolComputing/xrootd-se/blob/kreczko-resolving-tls/etc/xrootd/config.d/20-https-and-security.cfg) seems to be a step in the right direction.
>
> I still see 15 min timeouts (FTS logs) after a successful transfer (checksum request):
> ```
> TRANSFER [112] DESTINATION CHECKSUM (Neon): Could not read status line: Connection timed out
> ```
> and I see  `(send failure)` and `(link SSL read error)` in the redirector and server logs respectively.
> But I also see them for requests that I know went well (e.g. ETF tests for CMS).
>
> I've now also updated to Xrootd 5.5.0 (after confirming config change went into the right direction)
>
>
>
>
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