No Open PortsDefault installations of Ubuntu must have no listening network services after initial install. Exceptions to this rule on desktop systems include network infrastructure services such as a DHCP client and mDNS (Avahi/ZeroConf, see ZeroConfPolicySpec for implementation details and justification...
while any application within the server would be able to reach the outside world. Additional rules to allow specific services and ports are included as exceptions to this general policy.
are the IP options, if any. Next, for TCP and UDP packets, the source and destination IP addresses and TCP or UDP ports, with a dot between each IP address and its corresponding port, will be printed, with a > separating the source and destination. For other protocols, the addresses ...
# * ports.conf is always included from the main configuration file. It is # supposed to determine listening ports for incoming connections which can be # customized anytime. # # * Configuration files in the mods-enabled/, conf-enabled/ and sites-enabled/ # directories contain particular config...
What is the benefit of ssh.socket? The price is that ssh configuration is now split between the actual ssh daemon and systemd. I rarely read ssh documentation or even the comments in sshd_config anymore and was just baffled first that my settings are ignored, then that there was not /etc...
lines in the example ethtool output illustrate what a 100Mb/s, full duplex network should report. If you notice slow network speeds on a host, its speed and duplex settings are a good place to look. Run ethtool as in the example above, and if you notice Duplex set to Half, then ...
Check ports Additionally, you can also use the system commands like netstat or ss to check which processes are running, and if they are listening to any ports. This can help you spot any possible misconfigurations, even if the services are seemingly active. For instance, a different process ...
| `-- *.conf apache2.confis the main configuration file. It puts the pieces together by including all remaining configuration files when starting up the web server. ports.confis always included from the main configuration file. It is used to determine the listening ports for incoming connection...
No Open PortsDefault installations of Ubuntu must have no listening network services after initial install. Exceptions to this rule on desktop systems include network infrastructure services such as a DHCP client and mDNS (Avahi/ZeroConf, see ZeroConfPolicySpec for implementation details and justification...
| `-- *.conf apache2.confis the main configuration file. It puts the pieces together by including all remaining configuration files when starting up the web server. ports.confis always included from the main configuration file. It is used to determine the listening ports for incoming connection...