Debian Network Testing Basics

Debian Network Testing basics-Linux Release Technology-Debian information. The following is a detailed description. $ Ping yahoo.com # Check the Internet connection
$ Traceroute yahoo.com # Tracking IP data packets
$ Ifconfig # Check host settings
$ Route-n # Check route settings
$ Dig [@ dns-server.com] host. dom [{a | mx | any}] | less

# Check the host. dom DNS record for the dns-server.com
# Search for {a | mx | any} records

$ Ipchains-L-n | less # Check packet filtering (2.2 kernel)
$ Iptables-L-n | less # Check packet filtering (2.4 or 2.6 kernel)
$ Netstat-a # search for all opened ports on the System
$ Netstat-l -- inet # search for the system listening port
$ Netstat-ln -- tcp # Find the TCP port listened by the system (port number)