managed server

  Turn off brute force notifications BUT keep the monitor running and blocking echo "hide_brute_force_notifications=1" >> /usr/local/directadmin/conf/directadmin.conf Once done, restart directadmin.

Error: Plugin load for plugin 'geoip' failed with return code: Error: Can't locate Geo/IP.pm in @INC   yum install GeoIP GeoIP-devel perl-Geo-IP

  Mail is delivered to the  MTA , but not to the mailbox If there is a line in the /var/log/zimbra.log like: postfix/lmtp ... deferred ... connection refused There is no connection to port 7025 to perform Local Mail Transfer Protocol (LMTP) delivery. This is nearly always caused by a host that is configured on private IP Space (or using NAT) and that does not have an interface for the public IP address the server resides on. This can be easily fixed by simply using native IP address lookups for lmtp rather than DNS. Alternatively, you could have your internal network's domain name configured to lookup differently internally than it does externally. Using that method is beyond the scope of this document. Zimbra Collaboration 8.5 or above ZCS 8.5 or above onwards this attribute is now in ldap - zimbraMtaLmtpHostLookup zmprov ms mtaserver.com zimbraMtaLmtpHostLookup native zmprov ms `zmhostname` zimbraMtaLmtpHostLookup native In case that you are using Single Server, be aware alway

Error getting authority: Error initializing authority: Error calling StartServiceByName for org.freedesktop.PolicyKit1: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.freedesktop.PolicyKit1': timed out (g-dbus-error-quark, 20)   yum reinstall polkit

  /usr/sbin/named-checkconf -z /etc/named.conf comment all those lines which are in inside the /etc/named.conf by searching the domains   /usr/sbin/named-checkconf -z /etc/named.conf > bum.txt _default/207.58.129.178/IN: bad zone _default/bimetallug.com/IN: file not found _default/cableglandindia.com/IN: file not found _default/centrifugalfanblower.com/IN: file not found _default/stonecrusherindia.com/IN: file not found _default/indiadiecasting.com/IN: file not found _default/alcrometechno.maharashtradirectory.com/IN: file not found _default/cableglandindia.maharashtradirectory.com/IN: file not found #zone "linux.mahamail.com" { type master; file "/var/named/linux.mahamail.com.db"; }; #zone "midreseller.com" { type master; file "/var/named/midreseller.com.db"; }; like this

  To fix this, run the following as root: Code: ./build all d ./build rewrite_confs

  Windows 10 - IPv6 Connectivity: No network access, but other devices can use IPv6 with no issue I had exactly the same problem, ISP delivers IPv4 and IPv6, but only my laptop shows both, my desktop PC only IPv4, the problem was HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters DisabledComponents was set to 0xffffffff I changed it to 0x00000020 reboot, and IPv4 IPv6 was available again, this link explains the details  https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/configure-ipv6-in-windows  So checking or unchecking IPv6 in network-adapter-setting is quite useless, only the registry-value is important modify decimal value 32 is  0x00000020 which will enable IPv6  still that registry was resetting so uninstalled all VPN and antivirus after that it starts working