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a DNS server I wrote 10 years ago. Here for historical reasons
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******************* Note: Yaku-NS is a 10 years old project. It is here for personal "historical" reasons, as this is one of the first non trivial C projects I wrote. ******************* +==================================================+ | WARNING | | Yaku-NS is in the beta stage of development | | possibly unstable, insecure, sperimental code. | | USE IT AT YOUR RISK. | +==================================================+ ----------- ADVERTISING ----------- Yaku-ns is GPLed, but you can get a BSD-like license for your own company usage (for example to develop a closed-source fork and put yaku-ns in some router, appliance, ...) for 1000 EUR. The licence can't be sold to others, and applies to the current CVS source code, that is, you can't use code that I put in the CVS _after_ you already got the license. There aren't time limits. After you got the license you can modify the code and sell it in binary form, inside a ROM, where you want, forever. For more information please write to email@example.com -------- OVERVIEW -------- Yaku-NS is a DNS server that implements a subset of the DNS protocol. For a full featured DNS server check the BIND For a very secure DNS server (not complete, with a silly license) check DJBDNS For an alternative (almost complete) DNS server implementation check DENTS For a new upcoming GPL DNS implementation check MARADNS The goal is to provide an easy to configure GPLed alternative for: * A DNS server for myself. I'm unable to configure bind * A primary/secondary DNS server * Forward only DNS server * Dial-up systems * Embedded systems ---------------------------------- HOW TO SETUP YAKU IN YOUR UNIX BOX ---------------------------------- Yaku-NS runs without root privileges in a chroot jail. We provided this features for your security, please enable this features! COMMAND LINE OPTIONS ~~~~~~~~~~~~~~~~~~~~ usage: yaku-ns [-p <port>] [-f <port>] [-C <max>] [-F <max>] [-T <forward_timeout>] [-c <config_file>] [-l <logfile>] [-r <chroot jail>] [-u owner] [-b <addr>] [-xdDhV] -p <port> Use the UDP port <port> for the DNS service. -P <port> Use the TCP port <port> for the DNS under TCP service. The only two requests accepted under TCP are IN/AXFR and IN/SOA. -f <port> Query the external DNS servers to the port <port>. -C <size> Use a cache of size <size>, 0 is no-cache. -F <max> Use a forwarded request queue of size <size>, 0 turn off the forwarding. -T <timeout> Forwarded requets expire in <timeout> seconds. -c <file> Use the config file <file>: WARNING you must specify the absolute path here, since the server chdir() to "/". Also note that this path is relative to the chroot jail. Use "-" as filename to provide the configuration from the standard input. -l <file> Use the <file> for yaku-ns logs. Remember to use an absolute path, relative to the chroot (if used). -r <directory> Chroot to <directory>. -u <username> Run as <username> (default is nobody, not so secure). -b <address> Bind only the interface with IP address <address>. -x Enable the TCP services. -d Demonize. -h Show a little help. -V Verbosity level: -V: low level, -VV medium level, -VVV high level of verbosity. -VVV is raccomanded for new users. See how to create a configuration file using the self-commented config file at Documentation/yaku-ns.conf.example Follow this steps to install Yaku-NS in a unix-like system: COMPILING YAKU-NS ~~~~~~~~~~~~~~~~~ $ vi tunable.h (optional) $ make INSTALLING ENS ~~~~~~~~~~~~~~ Create a system user "yaku" in the "yaku" group. # mkdir /usr/local/yaku-ns # chown yaku:yaku /usr/local/yaku-ns # chmod 700 /usr/local/yaku-ns # cp yaku-ns /usr/local/yaku-ns # cp Documentation/yaku-ns.conf.example /usr/local/yaku-ns/yaku-ns.conf # chown root:root /usr/local/yaku-ns/* # chmod 755 /usr/local/yaku-ns/yaku-ns # chmod 644 /usr/local/yaku-ns/yaku-ns.conf # touch /usr/local/yaku-ns/yaku-ns.log # chown yaku:yaku /usr/local/yaku-ns/yaku-ns.log # chmod 644 /usr/local/yaku-ns/yaku-ns.log # cd /usr/local/yaku-ns # ls -l The output of the ls -l command should be like the following: total 168 -rwxr-xr-x 1 root root 153306 Dec 26 14:48 yaku-ns -rw-r--r-- 1 root root 10107 Dec 26 14:49 yaku-ns.conf -rw-r--r-- 1 yaku yaku 0 Dec 26 14:53 yaku-ns.log CONFIGURING YAKU-NS ~~~~~~~~~~~~~~~~~~~ Edit the example self-commented configuration file /usr/local/yaku-ns/yaku-ns.conf and create your configuration. RUNNING YAKU-NS ~~~~~~~~~~~~~~~ To run Yaku-NS inside a chroot jail (raccomanded!) with TCP services enabled just use: # /usr/local/yaku-ns/yaku-ns -xd -u yaku -r /usr/local/yaku-ns/ -c /yaku-ns.conf Note that the configuration file is specified using the absolute path, relative to the chroot. SIGNALS ~~~~~~~ Yaku-NS performs different action if some signal is received: SIGHUP: Reload the configuration (use it when your records was updated) SIGUSR1: Force yaku-ns to log some debugging information SIGUSR2: Switch the forwarding ON/OFF ------- GETZONE ------- Getzone is a trivial utility that performs an AXFR request over TCP to some primary DNS server and produces as output the zone in a format compatible with the Yaku-NS configuration file. You can use it to create a rudimental secondary DNS (slave) but a better solution will be on the road ASAP (It wasn't ASAP since I use only external secondary nameservers, so yaku-ns is my primary DNS server). Usage: getzone -z <zone> -s <server IP address> [ -p <port> ] -z The zone to download -s The IP address of the master server -p Specify a different destination port, the default is port 53 Example: $ getzone -z test.org -s 188.8.131.52 > salve-db.test.org Than you need to send a SIGHUP to Yaku-NS to force a local RRs reload. Obviously you need to add an include keyword in the yaku-ns.conf to include the zone. See the example configuration file for more information. Have fun, antirez