{"id":636,"date":"2012-10-19T10:46:44","date_gmt":"2012-10-19T10:46:44","guid":{"rendered":"https:\/\/raspberry-projects.com\/pi\/?p=636"},"modified":"2023-12-11T13:33:36","modified_gmt":"2023-12-11T13:33:36","slug":"configuring-network-adaptors","status":"publish","type":"post","link":"https:\/\/raspberry-projects.com\/pi\/programming-in-c\/tcpip\/configuring-network-adaptors","title":{"rendered":"Configuring Network Adaptors"},"content":{"rendered":"

Editing Network Adaptor Settings<\/h4>\n

Restarting After Changes<\/h4>\n

After changes to the network interface configuration, you have to restart the network interface using this (assuming the interface is called “eth0”).<\/p>\n

sudo ip link set eth0 down && sudo ip link set eth0 up<\/code><\/pre>\n
Assigning A Manual IP Address<\/h4>\n
For recent\u00a0versions of\u00a0Raspbian \/etc\/network\/interfaces should no longer be edited – it must be left as default (all adaptors set to ‘manual’). \u00a0Network interface addresses are now being controlled by the DHCP client dhcpcd5 instead of using the interfaces file<\/p>\n
\nsudo nano \/etc\/dhcpcd.conf\n<\/code><\/pre>\n
Add this for\u00a0eth0 or wlan0 with your own settings as required<\/p>\n
\n#ASSIGN A MANUAL IP ADDRESS INSTEAD OF USING DHCP\ninterface eth0\n   static ip_address=192.168.1.20\/24\n   static routers=192.168.1.1\n   static domain_name_servers=192.168.1.1\n<\/code><\/pre>\n
(The \/24 indicates the first 24 bits are also\u00a0the subnet mask).<\/em><\/p>\n
By setting\u00a0ip_address,\u00a0dhcpcd\u00a0will then not attempt to obtain a lease and just use the value for the\u00a0address with an infinite lease time.<\/em><\/p>\n
Press CTRL+X to save and exit.<\/p>\n
You can find more info on the configuration possibilities\u00a0here<\/a>.<\/p>\n
Manually Configuring WiFi<\/h4>\n
See here<\/a>.<\/p>\n
DHCP vs Manual IP Settings – Pre Raspbian Jessie (old versions)<\/span><\/h4>\n
\niface eth0 inet dhcp\n<\/code><\/span><\/pre>\n
or<\/span><\/p>\n
\niface eth0 inet static\n     address ###.###.###.###\n     netmask ###.###.###.###\n     gateway ###.###.###.###\n\n<\/code><\/span><\/pre>\n
WiFi Adaptor Setup – Pre Raspbian Jessie (old versions)<\/span><\/h4>\n
First make sure the system is up to date:<\/span><\/p>\n
\nsudo apt-get update\n<\/code><\/span><\/pre>\n
Open the interfaces file<\/span><\/p>\n
\nsudo nano \/etc\/network\/interfaces\n<\/code><\/span><\/pre>\n
Setup as follows:<\/span><\/p>\n
\nauto lo\n\niface lo inet loopback\niface eth0 inet dhcp\n\nallow-hotplug wlan0\nauto wlan0\n\niface wlan0 inet dhcp\n     wpa-ssid \"YOUR_SSID\"\n     wpa-psk \"YOUR_KEY\"\n\niface default inet dhcp\n<\/code><\/span><\/pre>\n
Alternative Setup – Using A Fixed IP<\/span><\/h5>\n
\n\nauto lo\n\niface lo inet loopback\niface eth0 inet dhcp\n\nallow-hotplug wlan0\nauto wlan0\n\niface wlan0 inet static\n     address 172.27.20.11\n     netmask 255.255.0.0\n     gateway 172.27.20.1\n     wpa-ssid \"YOUR_SSID\"\n     wpa-psk \"YOUR_KEY\"\n\niface default inet dhcp\n<\/code><\/span><\/pre>\n
Alternative Setup – Using a hidden SSID and need to specify all of the WiFi settings<\/span><\/h5>\n
\nauto lo\n \niface lo inet loopback\niface eth0 inet dhcp\n \nauto wlan0\nallow-hotplug wlan0\n\niface wlan0 inet dhcp\n   wpa-scan-ssid 1\n   wpa-ap-scan 1\n   wpa-key-mgmt WPA-PSK\n   wpa-proto RSN WPA\n   wpa-pairwise CCMP TKIP\n   wpa-group CCMP TKIP\n   wpa-ssid \"YOUR_SSID\"\n   wpa-psk \"YOUR_KEY\"\n\niface default inet dhcp\n<\/code><\/span><\/pre>\n","protected":false},"excerpt":{"rendered":"
Editing Network Adaptor Settings Restarting After Changes After changes to the network interface configuration, you have to restart the network interface using this (assuming the interface is called “eth0”). sudo ip link set eth0 down && sudo ip link set eth0 up Assigning A Manual IP Address For recent\u00a0versions of\u00a0Raspbian \/etc\/network\/interfaces should no longer be […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,31],"tags":[],"class_list":["post-636","post","type-post","status-publish","format-standard","hentry","category-network-settings","category-tcpip"],"_links":{"self":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts\/636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/comments?post=636"}],"version-history":[{"count":25,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts\/636\/revisions"}],"predecessor-version":[{"id":3703,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts\/636\/revisions\/3703"}],"wp:attachment":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/media?parent=636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/categories?post=636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/tags?post=636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}