Re: Iptables port 5353 -

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Bob Goodwin wrote on Sunday 04 November 2007:

> >>>>    It appears that I [192.168.1.6] am the source of them?  Should
> >>>> I have 5353 open?  What is their significance?

> > As Luciano pointed out, it is the mDNS service. Therefor you probably
> > have an active mDNS server instance (e.g. avahi) which announces your
> > machine throughout the local network.

> Should I open this port?  would it benefit the Windows and Mac users on
> my LAN?  If so will it do that without increasing traffic to and from
> my ISP?

You benefit depends on your network infrastructure. If you already have a 
DNS server then there is no benefit. If you don't have a DNS then using 
avahi along with nss-mdns give you dynamic IP resolving. For Windows 
Apple's implementation of Zeroconf (namely: Bonjour) is available. For 
Mac, well... batteries included. ;)

For example you can tell avahi to use a domain like .lan (or .local 
or .bunny or ...) for mDNS announces. Then a host name like
"computer.lan" can be resolved to its IP address.

You also get a service discovery feature. With avahi installed an 
application can talk to it on the DBUS and for example annouce "I'm a 
webserver listening on port 8080". Another application on another host 
can ask its own avahi for available services and make use of them. Avahi 
can be configured to announce services for application which cannot (yet) 
talk to it on DBUS, or even for apps running on another host.

Example: If you install Bonjour on a Windows machine, a plugin for 
Internet Explorer will be installed presenting available WWW servers.

Still: if you have a small home network of at most 5 computers there is 
very little advantage. And DNS-SD (DNS Service Discovery) only works on 
the local net, it does not pass network boundaries or dial-up-connections 
(Multicast feature must be available).

> Googling mdns has not been very helpful in answering my questions ...

http://en.wikipedia.org/wiki/MDNS

-- 
bye,
Adalbert

Duckies are fun!

-- 
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [Fedora Magazine]     [Fedora News]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Maintainers]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Legacy]     [Fedora Desktop]     [Fedora Fonts]     [ATA RAID]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [SSH]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Centos]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Tux]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Asterisk PBX]     [Fedora Sparc]     [Fedora Universal Network Connector]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux