Re: Firewall blocking my new Debian 11 server ports 80 and 443
On Sat, May 28, 2022 at 05:51:38PM -0500, Tom Browder wrote:
> $ sudo su
> # telnet 80
> Trying 0.0.0.80...
... wow. Just wow. How can such a short excerpt contain so many failures?
1) "sudo su" is stupid. You don't need TWO setuid programs to get a root
shell. Either use "sudo -s" or "su". Hell, even "sudo bash" would
make more sense and would be less wasteful.
2) As you can PLAINLY SEE in the output of telnet, you messed up the
arguments. You supplied "80" as a hostname/address, instead of a
port number. If you wanted to probe port 80 of your web server, you
need to supply the web server's hostname/address as the first argument,
and 80 (the port number) as the second argument.
3) You don't need to be root to telnet to another host (or the same host,
if you're giving "localhost" as the hostname) in the first place.
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