Slave DNS cannot sync: rndc: connect failed: 953: timed out

Symptoms

Cannot set up slave DNS server using Slave DNS extension. It shows exclamation mark with the following error:

PLESK_ERROR: Error code 1: rndc: connect failed: 203.0.113.2#953: timed out

Cause

Integration configuration is not added to slave DNS server.

Resolution

1. Go to Plesk > Extensions > Slave DNS Manager and click the slave DNS server to get the configuration details that should be added to the slave DNS server. For example:

2. Login to slave DNS server via SSH

3. Back up original DNS configuration:

# cp /etc/named.conf /etc/named.conf.bak

4. open /etc/named.conf and add the configuration details. For example:

CONFIG_TEXT: options {
allow-recursion {
localnets;
};
allow-new-zones yes;
listen-on-v6 { any; };
version "none";
directory "/var";
auth-nxdomain no;
pid-file "/var/run/named/named.pid";
};

key "rndc-key" {
algorithm hmac-md5;
secret "CeMgS23y0oWE20nyv0x40Q==";
};

key "rndc-key-10.39.92.113" {
algorithm hmac-md5;
secret "ZDhmYThiYWExNDEyOTk1OTM4ZmFjNw==";
};

  controls {
inet * port 953 allow { 10.39.92.113; 127.0.0.1; } keys { "rndc-key-10.39.92.113"; };

};

5. Restart slave DNS service:

on Debian/Ubuntu:

# systemctl restart bind9

on RHEL/CentOS:

# service named-chroot restart