I am trying to connect an energy monitor to a raspberry pi equipped with
a small RS485 card from AB electronics. Effectively the card is just an
interface chip between the pi's GPIO pins and the RS485 bus which is
just 3 wires.
I have installed libmodbus and followed the instructions to disabl
Hi rob
You could always test it from the machine you are allowing...
Use telnet and try to connect to another port that you know is running a
service on the destination machine..
Thanks
G
On 3 Nov 2017 3:41 p.m., "Rob Malpass via Hampshire" <
hampshire@mailman.lug.org.uk> wrote:
> Thanks both –
My understanding would agree with yours, but "machine" is the key point.
If you had mulltiple IP addresses on your server, "any" would allow
192.168.0.99 to ssh into any of them. If you only have one, it doesn't
matter, but might be worth bearing in mind in case you set up another
which you don't
Thanks both – so if I do
sudo ufw allow from 192.168.0.99 to any port 22
then am I doing anything other than saying 192.168.0.99 can ssh in to this
machine? This is what I’m trying to achieve but the “any” is confusing me
somewhat – though the rule itself does seem to be doing what I w
man ufw doesn't seem to have much to say on the matter, but
https://help.ubuntu.com/community/UFW
suggests "any" in this context means any destination IP address (given
that there may be many associated with a host):
> *Allow by specific port, IP address and protocol*
>
> sudo ufw allow from to
I am not an expert but acordinng to the man page the long format appears to be
ufw to
So this will allow a connection from Y to any destination on port X.
On 3 November 2017 14:57:02 GMT+00:00, "Peter B. via Hampshire"
wrote:
>From any port on y Maybe?
>
>On 3 Nov 2017 14:53, "Rob Malpass
>From any port on y Maybe?
On 3 Nov 2017 14:53, "Rob Malpass via Hampshire" <
hampshire@mailman.lug.org.uk> wrote:
> Hi all
>
>
>
> Simple question (I hope). If I’m opening port x from ip address y on my
> network with the following command
>
>
>
> sudo ufw allow from y to any port x
>
>
>
> …t
Hi all
Simple question (I hope). If I'm opening port x from ip address y on my
network with the following command
sudo ufw allow from y to any port x
.then where does the "any" come from? Anyone know? Seems strange to say
"any port" then list the port number - unless I've misunder
