94
votes
Accepted
netplan generate: `gateway4` has been deprecated, use default routes instead
The current syntax to replace gateway4 is routes with to and via.
For the netplan above based on the 192.168.10.0/24 network, it would be:
routes:
- to: default
...
- 2,153
37
votes
How to delete an IP route?
You haven't included which system you're on or which tool-set you're using, but the two most common commands for managing the routing tables are the route and ip commands.
Here is how you might ...
- 10k
28
votes
Accepted
What is the best way to add a permanent route?
You mentioned /etc/network/interfaces, so it's a Debian system...
Create a named routing table. As an example, I have used the name, "mgmt," below.
echo '200 mgmt' >> /etc/iproute2/...
- 16k
28
votes
Accepted
Command route not found
The "command not found" error means you don't have the command installed.
Using Debian's "search the contents of packages" page brings up:
...
/sbin/route net-tools [not powerpc]
....
So (...
- 7,966
18
votes
Accepted
What's the meaning of `linkdown` and `onlink' in Linux Route?
linkdown is the status that will show for a route that is in the table and configured to go out through an interface that is in the DOWN state. You can see this by running:
ip a
and looking for the ...
- 4,127
15
votes
14
votes
Accepted
How to add a static route in systemd-networkd?
This is a bug in systemd, still present on version 240.
Per the thread above, a workaround (or solution, I am not sure about the status since the bug is still open) is to add GatewayOnlink=yes in the [...
- 1,605
11
votes
Accepted
Is there no routing entry for loopback addresses?
The routing table isn’t the first thing taken into account when the kernel processes a packet; there’s a rule table which comes first, which you can see with ip rule list. ip route list (and the ...
- 450k
10
votes
Accepted
List *all* IP routes to a destination in the Linux routing table
There is an easy way to list all routes matchig prefix on linux :
ip -6 route list match 2607:f8b0:4005:804::200e table all
This will list all possible routes to specified target (including default, ...
- 116
10
votes
Accepted
How To Make All Traffic To Go Through One Interface In Linux
So in your configuration, all the packets you try to send to the network initially originating from 10.0.0.1 (because they are going through tun0 interface and its local address is 10.0.0.1). You ...
- 591
10
votes
How to set a static IPv6 default route with dhcpcd?
You cannot use DHCPv4 to give out default IPv6 routes. You cannot even use DHCPv6 to give out default IPv6 routes.
The reason is that IPv6 is different from IPv4 in many respects, and one of them is ...
- 32.7k
10
votes
Accepted
Adding static routes to debian 10 in /network/interfaces
The up ... lines are not stand-alone, but they are extensions of an iface ... line before them. Before Debian 9, the actual network interface used to pretty much always be the last entry in /etc/...
- 102k
9
votes
Accepted
Routing to the localhost, how does it work?
(Copied from https://serverfault.com/a/683542/68920)
The route command is deprecated, and should not be used anymore.
The new way is to use the iproute set of commands, which are all invoked with ip ...
- 72.5k
9
votes
How to understand the output of route
A quick example may help.
Presume this route table entry (from 'route -an' command output under Linux, and not all columns shown, only the ones we need - and this is the 'winning' entry, other entries ...
- 191
7
votes
Accepted
default route with linkdown
In new kernel we have new defaults. Solution is
echo 1 > /proc/sys/net/ipv4/conf/enp0s10/ignore_routes_with_linkdown
echo 1 > /proc/sys/net/ipv4/conf/enp0s18/ignore_routes_with_linkdown
And ...
- 905
7
votes
What is the portable way to get the default route source address?
For showing your default route source address:
ip route get 8.8.8.8 | awk ' /^[0-9]/ { print $7 }'
The { print $7 } is selecting the 7th field of the ip... output;
The ^[0-9] is selecting lines ...
- 57.1k
7
votes
What is the portable way to get the default route source address?
You could choose an arbitrary address which you believe will always be accessed via the default route, for example google DNS, and then print the source address for that route:
ip route get 8.8.8.8 | ...
- 9,065
7
votes
Command route not found
The /sbin isn't in your PATH, use:
$ /sbin/route
or :
$ export PATH=$PATH:/sbin
$ route
You can add the above command to your .bashrc:
echo "export PATH=$PATH:/sbin" >> .bashrc
source ....
- 67.7k
7
votes
What is the difference between '0.0.0.0/1' and 'default'?
0.0.0.0/1 via 10.z.0.1 dev tun0
128.0.0.0/1 via 10.z.0.1 dev tun0
Those two rules, together span the whole of 0.0.0.0/0 (the first one IP addresses from 0.0.0.0 to 127.255.255.255 and the second IP ...
- 558k
6
votes
Accepted
Restoring lost network routes after loss of network
A routing table will make your route permanent (to avoid adding it again/manually after a switch failover); First, create a named routing table. As an example, we could use "mgmt".
echo '200 mgmt' &...
- 14.7k
6
votes
Accepted
Problem when resetting the default-gw at flushed routing-table
On Linux, by default (when an address is not added with the flag noprefixroute), adding an address to an interface implicitly adds a route to the LAN with scope link. You have a route to your gateway ...
- 37.5k
6
votes
Accepted
`ip route add` does not allow duplicate entries, can I depend on that?
You can use ip route replace instead of add.
This takes the same parameters as add but does not fail, when the route currently exists.
As man ip-route tells us
ip route replace
change or ...
- 1,677
5
votes
Accepted
How to create/setup vpn using only SSH?
Source address of packets should be replaced by one of local machine's address so that answers could be received by local machine, otherwise there is no (good) reason for sending these packets to next ...
- 404
5
votes
Accepted
equivalent command `route -n` in BSD
You can use netstat -rn for this purpose.
See the FreeBSD man page on netstat for more details.
Incidentally, that also works in Linux, so in a way it's a more portable command than route -n to ...
- 22.1k
5
votes
Accepted
Why does a routing rule directing to a local network interface accept more than one destination IP addreses?
You’re forgetting that the interface provides access to a network, which (if it’s an IP network) is defined by a base IP address and a netmask (or prefix length in IPv6).
192.168.122.0 0.0.0.0 ...
- 450k
5
votes
Ifup interface failing with answers: file exists
This issue can have multiple sources:
First you can not have the same IP on multiple interfaces
/etc/network/interfaces.d/* config file can contain only one single gateway because this determine the ...
- 14.7k
4
votes
Accepted
Adding permanent routing
Add the route entry to your /etc/rc.local file (before exit 0):
/sbin/route add -net xxx.xxx.xxx.xxx netmask 255.255.240.0 gw xxx.xxx.xx.xxx
or add it to your crontab:
@reboot /sbin/route add -net ...
- 56.8k
4
votes
Accepted
Enabling an Internet route through ppp0
To achieve what I wanted to achieve I had to do the following things:
Step 1: Install the PPTP Client Program for Debian Project
Step 2: Setup the PPTP connection
Step 3: Testing the connection
...
- 191
Only top scored, non community-wiki answers of a minimum length are eligible