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Update NETWORKING.md

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@ -30,3 +30,90 @@ dhclient <DEVICE_NAME>
You can save either example in a script to activate the Wi-Fi whenever you want. You can save either example in a script to activate the Wi-Fi whenever you want.
* Note: As an educational tip, the name of a network is also called "_SSID_" in other places. * Note: As an educational tip, the name of a network is also called "_SSID_" in other places.
## Next
### using ufw
sudo ufw status
sudo ufw enable
sudo ufw disable
sudo ufw default deny
sudo ufw default allow
sudo ufw allow PORT_NUMBER
* delete a rule
sudo ufw delete allow PORT_NUMBER
* allow everything for a specific address
sudo ufw allow from IP_ADDRESS
* allow a specific port for a specific address
sudo ufw allow from IP_ADDRESS to any port PORT_NUMBER
### tcpdump
* dump all
sudo tcpdump
* dump 5 packets
sudo tcpdump -c 5
* dump in ASCii format
sudo tcpdump -A
* dump in hexadecimal format
sudo tcpdump -xx
* dump from an specific interface
sudo tcpdump -i INTERFACE_NAME
* dump from a specific port
sudo tcpdump port PORT_NUMBER
* dump 5 packets in hexadecimal from an specific interface and a specific port
sudo tcpdump -c 5 -xx -i INTERFACE port PORT_NUMBER
### netstat
* show routing table, including gateway
netstat -nr
* show all ports
netstat -tulpn
* show network usage of devices
netstat -i
* show active connections
netstat -ta
* show active connections, but show ip addresses instead
netstat -tan
### traceroute
* show which route your connection takes between your computer to the destination
traceroute WEBNAME_OR_IP
### nmap
* scan a specific ip address (including devices)
nmap IP_NUMBER
* scan a specific website
nmap WEBSITE_NAME
* scan a specific ip address (including devices) with more information
nmap -v IP_NUMBER
* scan two ip address (including devices), 192.168.0.1 and 192.168.0.54
nmap 192.168.0.1,54
* scan a range of ip address (including devices), from 192.168.0.1 to 192.168.0.100
nmap 192.168.0.1-100
* scan all ip address (including devices) from network 192.168.0.0
nmap 192.168.0.*
* scan address from a file
nmap -il FILE
* scan address and identify OS and running services
nmap -A IP_NUMBER
* check if target is up
nmap -sP IP_NUMBER
* check reason for services states
nmap --reason IP_NUMBER
* show host interfaces
nmap --iflist IP_NUMBER
### SSH
* login to remote host
ssh ADDRESS
* login to remote host as user USER
ssh USER@ADDRESS
* set ssh server configuration in /etc/ssh/sshd_config
Port 22 # default port
PermitRootLogin without-password # change "without-password" to "no"
AllowUsers USER_NAME # by allowing a specific user it restricts the others
* restart "ssh" service to activate changes
# use last 8 octets for hosts
255.255.255.0