Dhcp updating dns records
It has not been tested with the Samba 4 internal DNS server and it probably will not work with the Samba 4 internal DNS.
As this How To is based on a Debian OS install, the paths given may be different if you use another OS. /bin/bash # /etc/bin/# This script is for secure DDNS updates on Samba 4 # Version: 0.8.8 # DNS domain domain=$(hostname -d) if [ -z $ ]; then echo "Cannot obtain domain name, is DNS set up correctly? Exiting." logger "Cannot obtain domain name, is DNS set up correctly? Exiting." exit 1 fi # Samba 4 realm REALM=$(echo $) # Additional nsupdate flags (-g already applied), e.g.
Ace Fekay, MCT, MVP, MCITP EA, Exchange 2010 Enterprise Administrator, MCTS Windows 2008, Exchange 2010 & Exchange 2007, MCSE 2003/2000, MCSA Messaging 2003 Microsoft Certified Trainer Microsoft MVP: Directory Services Active Directory, Exchange and Windows Infrastructure Engineer Compiled 4/2006, recompiled 7/2009, & 1/4/201011/30/2011 – added DHCP credentials and DHCP/DNS tab properties screenshots.3/10/2012 – Added enabling DNS scavenging screenshots.8/22/2012 – Verified with a Microsoft enginner, we need to use the Dns Update Proxy group and configure credentials to work, not one or the other. Also fixed missing screenshots8/3/2012 – Additional info about DHCP Name Protection and that it requires Credentials, Dns Update Proxy, but more so to secure the Dns Update Proxy group .
When a client shuts down, and later returns past the lease time, it may get a different IP address.
Despite it being a DHCP Option, it’s not found in a DHCP server, scope or class option. You must delete them manually to allow DHCP to take care of all new records moving forward. Quoted from the following link: “Name squatting occurs when a non-Windows-based computer registers in Domain Name System (DNS) with a name that is already registered to a computer running a Windows® operating system.
If you are using a firewall, you will need to open TCP ports 6 Once you are sure everything is working as expected, restart both servers to ensure everything is running correctly.Using Netflow, I could see the ip address of the offender but couldnt see the hostname of the computer/workstation that was the offender.Here is my config for DHCP on the switch -ip dhcp pool PC network 10.1.70.0 255.255.255.0 domain-name dns-server 10.1.1.1 10.1.1.2 default-router 10.1.70.1 lease 8This is an office across the street from the main building."-d" for debug #NSUPDFLAGS="-d" # krbcc ticket cache export KRB5CCNAME="/tmp/dhcp-dyndns.cc" # Kerberos principal SETPRINCIPAL="[email protected]$" # Kerberos keytab # /etc/dhcpduser.keytab # krbcc ticket cache # /tmp/TESTUSER=$(wbinfo -u | grep dhcpduser) if [ -z "$" ]; then echo "No AD dhcp user exists, need to create it first..exiting." echo "you can do this by typing the following commands" echo "kinit [email protected]$" echo "samba-tool user create dhcpduser --random-password --description=\"Unprivileged user for DNS updates via ISC DHCP server\"" echo "samba-tool user setexpiry dhcpduser --noexpiry" echo "samba-tool group addmembers Dns Admins dhcpduser" exit 1 fi # Check for Kerberos keytab if [ !