![]() Unbound in comparison is an incredibly fast and secure DNS name server which, due to its small size, can easily be code audited for security. When an attack or exploit comes out it is advantageous as the attacker to go after the most used software. The other problem is BIND is used for around 70% of the worlds DNS servers leading to a monoculture environment. Complication leads to security exploits and over twenty(20) of the last seventy(70) critical bugs in FreeBSD have been due to BIND itself. BIND, also known as named, is getting extremely code bloated, slow and over complicated. FreeBSD 10 has already made the change as BIND is no longer included in the default install. In the future it is expected that many, if not all, other open source distributions will move to Unbound. Note that Unbound is not a full fledged authoritative server, but you can put in A records for forward and reverse resolution of a small private LAN. Unbound's design is a set of modular components which incorporate features including enhanced security (DNSSEC) validation, Internet Protocol Version 6 (IPv6), and a client resolver library API as an integral part of the architecture.Īs for the configuration, a simple resolving caching DNS server which can be used for a single machine or multi-machine LAN is only a few lines long. The binaries are written with a high security focus, tight C code and a mind set that it is always under attack or remote servers are always trying to pass it bad information. The software is distributed free of charge under the BSD license. Unbound is a very secure validating, recursive, and caching DNS server primarily developed by NLnet Labs, VeriSign Inc, Nominet, and Kirei. 4 Simple recursive caching DNS, UDP port 53 unencrypted.Rebooting clients after all the server configuration has been done should clear all caches and reload DHCP specified configuration. Many systems have internal DNS caches, so the changes may not be visible immediately. Triggering a DHCP renewal should update the data. ![]() For other servers with static nameserver entries make this address the first specified address.ĭHCP clients will need to have their DNS data updated. For linux hosts and others with a /etc/nf file use this address for the first nameserver entry. (This should be a private network address like 192.168.0.10.) Configure your DHCP server to list this address as the first DNS nameserver. If you configure dnsmasq with a domain, you can also lookup DHCP clients by name.ĭetermine the address of the dnsmasq host. Add the addresses of the servers to the /etc/hosts file on the host running dnsmasq, and restart dnsmasq. Using fixed addresses is a good idea for servers anyway. Alternatively, use fixed addresses outside the DHCP address range for the servers your want to route to. If you don't run it on your router, disable DCHP on the routers. If you have the memory you can install in on DD-WRT as a replacement for the default DHCP server.ĮDIT: If you choose to use dnsmasq it is best to set it up as the active DHCP server. It also provides DHCP, do if you don't run it on your DD-WRT router, you will want to decide which DHCP server to enable. It acts as a caching server for addresses on the Internet. A tool like dnsmasq can provide the necessary internal DNS from a /etc/hosts file. Using split DNS is far easier and I would recommend that approach. I believe you should be able to run shorewall-lite on DD-WRT, in which case you will need to build all your firewall in Shorewall rather than the DD-WRT tool. Shorewall builds an iptables firewall from a set of specification file, so the steps are not the required iptables commands, but map fairly easily to iptables. The Shorewall FAQ 2 covers doing configuring the router so that it will work. The best option is to connect directly to the desired server from inside the network. Connecting to the Public IP from the LAN is usually a bad idea, and you will not be able to identify the connection source. DD-WRT is likely not configured for hairpin routing.
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