Networking - Revision history

Hdridder at 20:17, 4 January 2026

2026-01-04T20:17:29Z

← Older revision		Revision as of 20:17, 4 January 2026
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	=Basics=		=Basics=
			For IP networks there are 2 address schemes, [[IPv4]] and [[IPv6]]
	;ping <address>		;ping <address>
	:Get response from <address> interface		:Get response from <address> interface

Hdridder: /* Interfaces */

2026-01-04T20:12:10Z

Interfaces

← Older revision		Revision as of 20:12, 4 January 2026
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	;ip address		;ip address
	:Show all IP ~~adresses~~		:Show all IP addresses
	;ip -6 address		;ip -6 address
	:Show all IPv6 addresses		:Show all IPv6 addresses
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	wpa-psk <password>		wpa-psk <password>

			# For static ipv4
			interface <interface> inet static
			address xxx.xxx.xxx.xxx/<masklen>
			gateway xxx.xxx.xxx.xxx
	# To have ipv6 auto-configured (by SLAAC)		# To have ipv6 auto-configured (by SLAAC)
	iface <interface> inet6 auto		iface <interface> inet6 auto

Hdridder at 14:29, 11 December 2025

2025-12-11T14:29:28Z

← Older revision		Revision as of 14:29, 11 December 2025
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	[[Category:networking]]		[[Category:networking]]
	[[Category:Linux/Unix]]		[[Category:Linux/Unix]]

			=Basics=
			;ping <address>
			:Get response from <address> interface
			;<code>for i in $(seq 1 254); do ping -c1 -t 1 10.117.192.$i; done</code>
			:Scan a subnet

	=Check network connectivity=		=Check network connectivity=
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	</syntaxhighlight>		</syntaxhighlight>

	~~=[[OpenSSL]]=~~
	~~See the [[OpenSSL]] page~~

	=Interfaces=		=Interfaces=

Hdridder: /* Tracing */

2025-05-29T12:55:09Z

Tracing

← Older revision		Revision as of 12:55, 29 May 2025
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	=Tracing=		=Tracing=
	For tracing traffic see [[Tcpdump]]		For tracing traffic see [[Tcpdump]]

			;traceroute <destination>
			:Show which route a package takes to reach destination

			;ip route get <IPaddress>
			:Show the interface used to go to <IPaddress>
			To get just the interface name you can use this[https://unix.stackexchange.com/questions/14961/how-to-find-out-which-interface-am-i-using-for-connecting-to-the-internet]:
			<syntaxhighlight lang=bash>
			host=<fqdn>
			host_ip=$(getent ahosts "$host" \| awk '{print $1; exit}')
			ip route get "$host_ip" \| grep -Po '(?<=(dev ))(\S+)'
			</syntaxhighlight>

	=Other=		=Other=
	;<code>wget <URL></code>		;<code>wget <URL></code>
	:Get the data from <URL>		:Get the data from <URL>

Hdridder: /* Routing */

2024-08-30T09:19:14Z

Routing

← Older revision		Revision as of 09:19, 30 August 2024
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	=Routing=		=Routing=
	;route add -net default gw <IPaddress>		;route add -net default gw <IPaddress> # Deprecated
			;ip route add -net default gw <IPaddress>
	:Add a default route using <IPaddress> as gateway		:Add a default route using <IPaddress> as gateway

Hdridder: /* Interfaces */

2024-08-30T09:17:57Z

Interfaces

← Older revision		Revision as of 09:17, 30 August 2024
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	=Interfaces=		=Interfaces=
	;ifconfig -a		;ifconfig -a # Deprecated, replaced by ip
	:Show all network interfaces		:Show all network interfaces

Hdridder: /* Check network connectivity */

2024-08-30T09:15:27Z

Check network connectivity

← Older revision		Revision as of 09:15, 30 August 2024
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	=Check network connectivity=		=Check network connectivity=

	;netstat -~~nap~~		;netstat -na # deprecated
	:Show port status (LISTEN, ESTABLISHED, .....) ~~and~~ the ~~program~~ that owns ~~it. You need to be root to see~~ the ~~process information~~		;ss -na
			:Show port status (LISTEN, ESTABLISHED, .....)
			:If you are root -p adds the process that owns the socket

	;<code>nc -v -z <host> <port></code>		;<code>nc -v -z <host> <port></code>

Hdridder: /* Interfaces */

2024-06-16T15:08:50Z

Interfaces

← Older revision		Revision as of 15:08, 16 June 2024
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	:Show interface link status (speed)		:Show interface link status (speed)

	When not using confusing things like NetworkManager network configuration is controlled by the interfaces file.		When not using confusing things like [[NetworkManager]] network configuration is controlled by the interfaces file.
	;/etc/network/interfaces		;/etc/network/interfaces
	<syntaxhighlight lang=text>		<syntaxhighlight lang=text>

Hdridder: /* Interfaces */

2024-06-15T19:27:34Z

Interfaces

← Older revision		Revision as of 19:27, 15 June 2024
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	:Assign <ipaddress> to <interface>		:Assign <ipaddress> to <interface>

	;ip ~~-a address~~		;ip address
	~~;ip -a -6~~ address
	:Show all IP adresses		:Show all IP adresses
			;ip -6 address
	:Show all ~~IPv4~~ addresses		:Show all IPv6 addresses

	;ip -6 addr add <ipv6address>/<prefixlength> dev <interface>		;ip -6 addr add <ipv6address>/<prefixlength> dev <interface>
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	:Show interface link status (speed)		:Show interface link status (speed)

	~~;The~~ interfaces file		When not using confusing things like NetworkManager network configuration is controlled by the interfaces file.
	~~<syntaxhighlight lang=bash>~~		;/etc/network/interfaces
	~~apt-get purge network-manager~~		<syntaxhighlight lang=text>
	vi /etc/network/interfaces
	auto <interface> # Boot process waits until the interface is up or a time-out (5 minutes)		auto <interface> # Boot process waits until the interface is up or a time-out (5 minutes)
	allow-hotplug <interface> # Boot process does not wait for the interface.		allow-hotplug <interface> # Boot process does not wait for the interface.
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	wpa-psk <password>		wpa-psk <password>

	# To have ipv6 ~~autoconfigured~~ (by ~~radvd~~) and add own address		# To have ipv6 auto-configured (by SLAAC)
			iface <interface> inet6 auto

			# To have ipv6 auto-configured (by SLAAC) and add own address
	iface <interface> inet6 static		iface <interface> inet6 static
	address unique:local:address:prefix:your:own:host:address		address unique:local:address:prefix:your:own:host:address
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	netmask 64		netmask 64

	# To have ipv6 ~~autoconfigured~~ (by ~~radvd~~) and query a dhcp-server		# To have ipv6 auto-configured (by SLAAC) and query a dhcp-server
	iface <interface> inet6 dhcp		iface <interface> inet6 dhcp
	autoconf 1		autoconf 1

Hdridder: /* Routing */

2024-02-11T14:26:26Z

Routing

← Older revision		Revision as of 14:26, 11 February 2024
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	:vi /etc/modprobe.d/blackllst.conf		:vi /etc/modprobe.d/blackllst.conf
	:Put in the driver for your interface like: <code>blacklist ath9k</code>		:Put in the driver for your interface like: <code>blacklist ath9k</code>

			=Wireless=
			;iwscan <interface> scanning
			:Show available accesspoints
			;iwconfig <interface>
			:Show details of the wireless connection

	=Routing=		=Routing=