Here we are pretending that 192.168.254.100 to 200 are our public address allocation. Might be used where you have, say 10 Ips and 15 hosts, who are not using the system all the time, so the average use is 10. Now you’re all set to get DNS and DHCP up and running.Dynamic NAT: You have a number of public IP addresses, and you allocate them to hosts. It is well worth reading through the entire configuration file though as there is a lot to be learnt from the excellent comments!ĭnsmasq is now configured to act as your network’s DHCP server and clients are told to use your server for DNS queries. # dhcp clients aware of the kerberos realm. # not be automatically added to the DNS records for forward/reverse # not be obtaining it's IP address via DHCP and therefore would this is required as the server itself will The important things for this guide are:ĭomain= #sets the domain name you're going to useĭhcp-range=192.168.0.50,192.168.0.150,12h #sets the range from which to allocate IP addresses to clients and the lease timeĭhcp-option=option:router,192.168.0.1 #sets the IP address of the router (gateway address) to be given to clientsĭhcp-option=option:ntp-server,192.168.0.2 #sets the NTP server to 192.168.0.2ĭhcp-authoritative #makes this the authoritative (in this case ONLY) DHCP server on the network However it is VERY well commented making it very easy to play around. The configuration file for Dnsmasq (/etc/nf) is HUGE. This way both forward and reverse lookups will work on any machine, as required by Kerberos □ We will configure it so that as it allocates IP addresses to clients on the network, it also adds them into its DNS server. You can of course substitute Google’s servers for your own ISP’s, or any other DNS server.ĭnsmasq will take care of both DNS and DHCP for your network. In this case we’re going to use our own DNS server as the primary DNS, followed by Google’s public DNS servers. Dnsmasq will then cache the IP for subsequent requests from any client speeding up DNS across your network □ #Windows 2011 sbs all ips dns server software#This way, when a client looks up an address outside of (.uk for example) dnsmasq (the software we’ll be using for DHCP and DNS) will query the name servers in nf. It’s time to configure nf so that your server (and soon clients) can query name servers other than your own. # This file describes the network interfaces available on your system This is done by editing /etc/network/interfaces like so: Make sure you have disabled DHCP on your router and set a static IP address for the server. This is ESSENTIAL if you plan to use Kerberos later on. This means all network clients will know that and 192.168.0.2 are one and the same. This will allow you to map hostnames to IP addresses (and vice versa!) automatically. The first thing to get your server to do is act as a DHCP and DNS server. The server will provide DHCP, DNS, NTP, LDAP, Kerberos and NFS services such that users can login to any machine on the network and all their files and settings will be the same across the entire network. This guide will help you configure Ubuntu Server Edition 11.10 for a small/medium business. #Windows 2011 sbs all ips dns server windows#
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