mDNS Primer

#1

Post by billiob » Sat, Aug 12, 2023, 6:02 AM UTC

mDNS Primer
fabiensanglard.net

Re: mDNS Primer

#2

Post by waynesonfire » Sat, Aug 12, 2023, 3:20 PM UTC

is the Unix Network Programming series still in print? A new copy of the book is extremely expensive on Amazon.

Re: mDNS Primer

#3

Post by jt2190 » Sat, Aug 12, 2023, 4:56 PM UTC

waynesonfire wrote: post #2

is the Unix Network Programming series still in print? A new copy of the book is extremely expensive on Amazon.

Here's a link to the book on the publisher's web site:

"Zero Configuration Networking: The Definitive Guide" by Daniel H Steinberg, Stuart Cheshire (2005) https://www.oreilly.com/library/view/zero-configuration-netw...

There's a link on that page to Amazon and other sellers.

ISBN: 9780596101008

Re: mDNS Primer

#4

Post by egberts1 » Sat, Aug 12, 2023, 6:47 PM UTC

Nice writeup. Alway put my mDNS-capable server devices behind a fire-walled sub-subnet or disable server’s Avahi/Bonjour if not needed.

Clients can run Avahi/Bonjour just fine, provided those ports are firewall-limited to its non-public subnet.

Re: mDNS Primer

#5

Post by vetinari » Sat, Aug 12, 2023, 9:11 PM UTC

egberts1 wrote: post #4

Nice writeup. Alway put my mDNS-capable server devices behind a fire-walled sub-subnet or disable server’s Avahi/Bonjour if not needed. Clients can run Avahi/Bonjour just fine, provided those ports are firewall-limited to its non-public subnet.

Since mDNS works over multicast, it will not leave their respective subnet. Getting that traffic over subnet boundaries is a problem of it's own (see also mDNS reflector)

Re: mDNS Primer

#6

Post by vetinari » Sat, Aug 12, 2023, 9:15 PM UTC

jt2190 wrote: post #3

waynesonfire wrote: post #2

is the Unix Network Programming series still in print? A new copy of the book is extremely expensive on Amazon.

Here's a link to the book on the publisher's web site: "Zero Configuration Networking: The Definitive Guide" by Daniel H Steinberg, Stuart Cheshire (2005) https://www.oreilly.com/library/view/zero-configuration-netw... There's a link on that page to Amazon and other sellers. ISBN: 9780596101008

That's different book; the OP meant the book on the second photo, "Unix Network Programming", ISBN 9780131411555.

Re: mDNS Primer

#7

Post by egberts1 » Sat, Aug 12, 2023, 9:45 PM UTC

vetinari wrote: post #5

egberts1 wrote: post #4

Nice writeup. Alway put my mDNS-capable server devices behind a fire-walled sub-subnet or disable server’s Avahi/Bonjour if not needed. Clients can run Avahi/Bonjour just fine, provided those ports are firewall-limited to its non-public subnet.

Since mDNS works over multicast, it will not leave their respective subnet. Getting that traffic over subnet boundaries is a problem of it's own (see also mDNS reflector)

(devices that advertise mDNS as a server should also not communicate via unicast IP out to the Internet, block those kinds).

Looking at you, both HP and Epson printers. Buy a Brothers printer but without their “Refresh” option (Refresh is a dial-home leaky privacy thing).