Re: [Ctan-mirrors] Re: Inefficienty of CTAN Mirror traffic for internal campus users (Routing/Redirect issue)

Hi all,

As I already mentioned at TUG 2025, routing by country without taking network 
speeds and latencies into account is not optimal.
I am looking into this issue specifically and will get back to you when there is 
progress.


Thanks
Erik


On Wed, 3 Dec 2025, Subhankar Mishra wrote:

> Hello all, 
> 
> Is there something we can do about this? 
> 
> Regards,
> Subhankar 
> 
> > On Dec 3, 2025, at 3:35 PM, Annada Behera <[email protected]> wrote:
> > 
> > Hi Mr. Hira
> > 
> > I am writing to bring to your attention a routing inefficienty regarding
> > our local CTAN mirror hosted at https://mirror.niser.ac.in/ctan/. We
> > host a high-speed mirror locally within our datacenter, but internal
> > users clicking the standard https://mirror.ctan.org/ are currently being
> > redirected to external mirrors:
> > 
> > -- https://in.mirrors.cicku.me/ctan/
> > -- https://2.mirrors.in.sahilister.net/ctan/
> > -- https://3.mirrors.in.sahilister.net/ctan/
> > 
> > Although our mirror is listed in the official website here:
> > https://ctan.org/mirrors/ the redirected issue still persists.
> > 
> > Here is the ping output:
> > 
> >    [void:~] ping -c 20 -q 2.mirrors.in.sahilister.net
> >    PING 2.mirrors.in.sahilister.net (82.180.146.159) 56(84) bytes of data.
> >    --- 2.mirrors.in.sahilister.net ping statistics ---
> >    20 packets transmitted, 20 received, 0% packet loss, time 19003ms
> >    rtt min/avg/max/mdev = 48.379/91.480/176.565/33.490 ms
> > 
> >    [void:~] ping -c 20 -q mirror.niser.ac.in
> >    PING mirror.niser.ac.in (10.10.0.36) 56(84) bytes of data.
> >    --- mirror.niser.ac.in ping statistics ---
> >    20 packets transmitted, 20 received, 0% packet loss, time 19422ms
> >    rtt min/avg/max/mdev = 0.483/0.534/0.558/0.020 ms
> > 
> > We are being redirected halfway through India to a mirror in
> > Mumbai with an average 90+ ms latency when a submilisecond
> > 0.534 mirror is in the campus.
> > 
> > Hopefully you can setup a network level redirection for all ctan mirrors
> > to point to the server at the datacenter. Thank you for your attention.
> > 
> >    Annada
> 
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