Regex question

[Zeeshan Ali Shah]

Hi, sorry it is more related with regex .. any hint ?

I want all domain starting from cdn  to use certain backend. no matter what
the tld is for example all :

cdn.xy.asda.com
cdn.sda.com
cdn.cdad.asda.ada.ad.net


what is the suitable regex for above?


thanks in advance
BR


Zeeshan
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