How secure are apps that using RPC portmapping?

[aleunix]

How secure are apps that using RPC portmapping?
In general the golden rule for the security consists in activating fewer services possible and only when necessary.
Perhaps I will try an application (this is a file manager) that seems to apply to use this service, such dangers arise in safety?

[jggimi]

Restrict usage of open ports by enabling OpenBSD's packet filter, PF.

Read the PF User's Guide (http://www.openbsd.org/faq/pf/index.html) and related man pages.

[aleunix]

I like play on firewall, indeed I have already enabling OpenBSD's packet filter. :D

In essence, to reduce the problems a good solution might be to identify the ports used by the service and then set them for exclusive use at a local?

[jggimi]

Correct. "$ netstat -an | grep LIST" will show you which TCP/UDP ports are open.

[BSDfan666]

For more detailed information, excluding any outgoing/incoming UDP/TCP connections.
fstat | grep internet | grep -v -e '>' -e '<'
It could probably be done in a cleaner fashion, but at least with this, you can determine some additional information about the process that opened the port.