[zeromq-dev] Can PUB/SUB sockets be connected by epgm over the internet?

Steven McCoy steven.mccoy at miru.hk
Tue Jan 8 15:31:37 CET 2013

On 8 January 2013 07:15, crocket <crockabiscuit at gmail.com> wrote:

> If there are more than 250 subscribers, a TCP socket would have to send a
> message to each of them iteratively, which is a great performance hit.
> Can I publish messages to hundreds of subscribers on an epgm socket over
> the internet?

You can try, whether it works or not is another issue as not everyone has
IPv4 multicast enabled.  It's more likely to work in IPv6 but you may need
to work on the hop limit socket option.  It's on my TODO list to configure
a public demo.

By design PGM isn't a secure protocol and can be easily subject to DoS.

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