{"id":355,"date":"2020-06-26T16:53:33","date_gmt":"2020-06-26T15:23:33","guid":{"rendered":"http:\/\/huf.org\/wp\/?p=355"},"modified":"2021-01-02T09:00:53","modified_gmt":"2021-01-02T08:00:53","slug":"raspberry-pi-make-routes-persistent-with-dhcpcd","status":"publish","type":"post","link":"https:\/\/huf.org\/wp\/?p=355","title":{"rendered":"raspberry pi: make routes persistent with dhcpcd"},"content":{"rendered":"\n
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routing decisions…<\/figcaption><\/figure><\/div>\n\n\n\n

<\/p>\n\n\n\n

so, the other day I needed to add a static route to my raspberry’s route table. the critter is running raspbian 9 („jessie“). this version of debianesque linux uses dhcpcd for the network configuration.<\/p>\n\n\n\n

you can find a whole lot of info on how to configure the box with a static ip address. however, there are few examples for configuring a static routing table entry <\/em>that will persist after a reboot.<\/p>\n\n\n\n

as we all know by now, you can enter a manual route using the command:<\/p>\n\n\n\n

# \/sbin\/route add -net 10.1.2.0\/24 gw 10.1.1.100<\/code><\/pre>\n\n\n\n
where 10.1.1.100 is the router on your local network behind which the target network 10.1.2.0 with the netmask 255.255.255.0 (the „\/24“) is to be found!<\/p>\n\n\n\n
this entry will be lost after a reboot. in order to make it persistent, you have to edit\/create a so-called „exit hook“. that’s a file that gets executed by dhcpd at various occasions, e.g. after the network interface has been configured with a valid address.<\/p>\n\n\n\n
here’s how to do it:<\/p>\n\n\n\n
edit the exit hook file. the command will create it, if it’s not there already:<\/p>\n\n\n\n
# sudo vi \/etc\/dhcpcd.exit-hook<\/code><\/pre>\n\n\n\n
add the routing command, just as you’d type it on the command line (first line is for documentation):<\/p>\n\n\n\n
## adding the persistent route from the example above:\n\/sbin\/route add -net 10.1.2.0\/24 gw 10.1.1.100<\/code><\/pre>\n\n\n\n
now, in order to activate the hook file, you can try: <\/p>\n\n\n\n
# sudo service dhcpcd restart<\/code><\/pre>\n\n\n\n
for a definitive test issue the reboot<\/strong> command.<\/p>\n\n\n\n
if something goes wrong, you can debug<\/strong> the dhcpcd hooks by editing the file \/lib\/dhcpcd\/dhcpcd-run-hooks<\/strong> and change the line<\/p>\n\n\n\n
: ${syslog_debug:=false}\nto\n: ${syslog_debug:=true}<\/code><\/pre>\n\n\n\n
you can then „tail \/var\/syslog“<\/strong> in order to see the debug output.<\/p>\n\n\n\n
happy routing!<\/p>\n","protected":false},"excerpt":{"rendered":"
so, the other day I needed to add a static route to my raspberry’s route table. the critter is running raspbian 9 („jessie“). this version of debianesque linux uses dhcpcd for the network configuration. you can find a whole lot … Weiterlesen →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-355","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/huf.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huf.org\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huf.org\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huf.org\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huf.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=355"}],"version-history":[{"count":9,"href":"https:\/\/huf.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/355\/revisions"}],"predecessor-version":[{"id":370,"href":"https:\/\/huf.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/355\/revisions\/370"}],"wp:attachment":[{"href":"https:\/\/huf.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huf.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huf.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}