<!DOCTYPE html><html><head><title></title><style type="text/css">p.MsoNormal,p.MsoNoSpacing{margin:0}</style></head><body><div>I don't think there are any configuration options in the recursor do to this, so you'll have to do it in a firewall system outside of the recursor. Blocking all outbound traffic to UDP port 53 would take care of it.</div><div><br></div><div>On Fri, Feb 28, 2025, at 06:45, Carlos N via Pdns-users wrote:<br></div><blockquote type="cite" id="qt" style=""><div dir="ltr"><div>Hello all<br></div><div><br></div><div>I,m looking for a way of forcing all outgoing queries from recursor to authoritative servers to be TCP.<br></div><div>I'm experiencing some packet discards in my platform internal network and i think forcing to TCP may help overcome some of the problems caused by discards.<br></div><div>Does anybody know how to do this or if it is even possible.<br></div><div>Documentation doesn't give any clue.<br></div><div>Kind regards and thanks in advance.<br></div><div><br></div><div> Carlos<br></div><div><br></div><div><br></div></div><div>_______________________________________________<br></div><div>Pdns-users mailing list<br></div><div><a href="mailto:Pdns-users@mailman.powerdns.com">Pdns-users@mailman.powerdns.com</a><br></div><div><a href="https://mailman.powerdns.com/mailman/listinfo/pdns-users">https://mailman.powerdns.com/mailman/listinfo/pdns-users</a><br></div><div><br></div></blockquote><div><br></div></body></html>