Hi Klaus, Knot DNS always sends NOTIFY over TCP. It's intentional, because UDP is unreliable. Unfortunately, it's not possible to easily switch to UDP :-/
Regards, Daniel On 06/08/2018 12:54 PM, Klaus Darilion wrote: > Hi! > > One of our customers uses Knot 2.6.7 as hidden master which sends > NOTIFYs to our slave service. He reported that Knot can not send the > NOTIFYs, ie: > > knotd[10808]: warning: [example.com.] notify, outgoing, > 2a02:850:8::6@53: failed (connection reset) > > It seems that Knot sometimes tries to send the NOTIFY with TCP (I see > also NOTIFYs via UDP). Unfortunatelly our NOTIFY-receiver only supports UDP. > > So, this is the first time seeing a name server sending NOTIFYs over > TCP. Is this a typical behavior in Knot? Can I force Knot to send > NOTIFYs always over UDP? > > Thanks > Klaus > -- https://lists.nic.cz/cgi-bin/mailman/listinfo/knot-dns-users
