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Full Discussion: Using avahi to publish IPV6 DNSservers - Security?
Special Forums UNIX and Linux Applications Using avahi to publish IPV6 DNSservers - Security? Post 302969187 by darktux on Saturday 19th of March 2016 10:02:47 AM
Old 03-19-2016
[Solved] Using avahi to publish IPV6 DNSservers - Security?
Hello,

we use here internal avahi to publish IPV6 DNSservers. It was the easiest way for us to use the service with radvd. Here is the part from the avahiconf:
publish-dns-servers=IPV6adress-dns-server
This works really fine. But my problem is the security. When you have this config for example in an public locaten. Some go here and broadcast his own dnsserver.

There is some file "/etc/mdns.allow". Here can you set domainnames. But this is only "from this client". For example: "tux.at"
When this is set, only client in the avahi-domain "tux.at" are dissolvable.

But what I would like to know is, is there a place on the client where i can set the IPadress of the server that is allowed to publish his dnsservers?

Thanks for help
Best Regards
Last edited by darktux; 04-22-2016 at 05:32 PM..
 

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LEARN ABOUT CENTOS

avahi-publish-address

avahi-publish-service(1)				      General Commands Manual					  avahi-publish-service(1)

NAME

       avahi-publish-service - Register an mDNS/DNS-SD service or host name or address mapping using the Avahi daemon

SYNOPSIS

       avahi-publish -s [options] name service-type port [TXT data ...]

       avahi-publish-service [options] name service-type port [TXT data ...]

       avahi-publish -a [options] host name address

       avahi-publish-address [options] host name address

DESCRIPTION

       Register an mDNS/DNS-SD service or host name/address mapping using the Avahi daemon.

OPTIONS

       When  calling in service registration mode, specify a DNS-SD service name (e.g. "Lennart's Files"), a service type (e.g. _http._tcp) and an
       IP port number for the service, optionally followed by any number of TXT record strings on the command line. When calling  in  address/host
       name registration mode specify a fully qualified host name and an address (IPv4 or IPv6).

       -s | --service
	      Register a service. avahi-publish-service is equivalent to avahi-publish -s.

       -a | --address
	      Register an address/host name mapping. avahi-publish-address is equivalent to avahi-publish -a.

       -v | --verbose
	      Enable verbose mode.

       -H | --host= HOSTNAME
	      Specify  a  host	name for this service, in case it doesn't reside on the local host. This host name needs to be fully qualified and
	      resolvable using mDNS or unicast DNS.

       -d | --domain= DOMAIN
	      Publish the service in the specified domain. If omitted the Avahi daemon will publish it in its default domain (usually .local).

       --subtype= SUBTYPE
	      Register the service with an additional subtype in addition to the main type. DNS-SD subtypes have  the  form  _anon._sub._ftp._tcp,
	      where _anon is the identifier of the subtype and _ftp._tcp is the main type. You may pass this option multiple times to register the
	      service with multiple subtypes.

       -f | --no-fail
	      Don't fail if the daemon is not found running. Instead, wait until it appears. If it disconnects, try to reconnect.

       -h | --help
	      Show help

       -V | --version
	      Show version information.

AUTHORS

       The Avahi Developers <avahi (at) lists (dot) freedesktop (dot) org>; Avahi is available from http://avahi.org/

SEE ALSO

       avahi-resolve(1), avahi-browse(1), avahi-daemon(8)

COMMENTS

       This man page was written using xml2man(1) by Oliver Kurth.

Manuals 							       User						  avahi-publish-service(1)
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