Adjustable routing

[balanga]

How do I go about changing my routing if I connect up to the Internet using an LTE/4G modem whilst connected to my home
LAN which has its own Internet Gateway?

The use of the modem only occurs from time to time.

Is there any way I can get the routing changed when I insert or eject the modem?

 

[aragats]

Assuming you have a USB modem. Create a file e.g. /etc/devd/modem.conf:

attach 100 {
        match "vendor"          "0xXXXX";
        match "product"         "0xYYYY";
        action "/home/balanga/bin/modem_attach.sh";
};
detach 100 {
        match "vendor"          "0xXXXX";
        match "product"         "0xYYYY";
        action "/home/balanga/bin/modem_detach.sh";
};

Then you can write those scripts modem_attach.sh and modem_detach.sh to do the job.
Something like:

route del X.X.X.X/A Y.Y.Y.Y
route add Z.Z.Z.Z/B W.W.W.W

 

[ondra_knezour]

You can also use a ppp command/script/config, if ppp is involved, see ppp(8), search for add! default HISADDR

 

[balanga]

You can also use a ppp command/script/config, if ppp is involved, see ppp(8), search for add! default HISADDR

I could never get my head around ppp scripts/configs and have fortunately managed to connect to the Internet using RNDIS which is far simply (once it's set up).

 

[balanga]

Assuming you have a USB modem. Create a file e.g. /etc/devd/modem.conf:

attach 100 {
        match "vendor"          "0xXXXX";
        match "product"         "0xYYYY";
        action "/home/balanga/bin/modem_attach.sh";
};
detach 100 {
        match "vendor"          "0xXXXX";
        match "product"         "0xYYYY";
        action "/home/balanga/bin/modem_detach.sh";
};

Then you can write those scripts modem_attach.sh and modem_detach.sh to do the job.
Something like:

route del X.X.X.X/A Y.Y.Y.Y
route add Z.Z.Z.Z/B W.W.W.W

Thanks for the help with routing... I'm issuing the followings commands:-

net del default
net add default 192.168.3.1

This gives me access to the Internet via my LTE modem. Just need figure out how to get the scripts to work.

 

[SirDice]

It's route add ..., not net add ..., see route(8).

 

[balanga]

Typo....