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Update networking.md

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Simplified the TAP setup script and made it more configurable for additional TAPs
This commit is contained in:
Mike Kostersitz (Oilcan Productions) 2023-02-28 17:56:48 -08:00 committed by Lars Brinkhoff
parent d65e766017
commit 422162a483
1 changed files with 12 additions and 9 deletions
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21
doc/networking.md
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@ -58,6 +58,8 @@ The above are examples from an Ubuntu 20.x system.
> Edit the script below to match your system!
> Especially the adapter name for the ethernet adapter in my case it is `eth0`
If you are running multiple ITS systems on the same host you can create more TAP adapters and attach them to the same bridge.
```
#!/bin/sh
HOSTIP='<Your ETH0 Host IP Address>' # i.e. 192.168.1.10
@ -65,22 +67,23 @@ HOSTNETMASK='<Your ETH0 Host IP Subnnet mask>' # i.e. 255.255.255.0
HOSTBCASTADDR='<Your ETH0 Broadcast address>' # i.e. 192.168.1.255
HOSTDEFAULTGATEWAY='<Your ETH0 default gateway>' # i.e. 192.168.1.1
ENETADAPTERNAME='eth0'
BRIDGENAME='br0'
TAPNAME='tap0'
#
/usr/sbin/tunctl -t tap0
/sbin/ifconfig tap0 up
/usr/bin/tunctl -t $TAPNAME
/sbin/ifconfig $TAPNAME up
#
# Now convert eth0 to a bridge and bridge it with the TAP interface
/usr/sbin/brctl addbr br0
/usr/sbin/brctl addif br0 $ENETADAPTERNAME
/usr/sbin/brctl setfd br0 0
/usr/sbin/brctl addbr $BRIDGENAME
/usr/sbin/brctl addif $BRIDGENAME $ENETADAPTERNAME
/usr/sbin/brctl setfd $BRIDGENAME 0
/sbin/ifconfig $ENETADAPTERNAME 0.0.0.0
/sbin/ifconfig br0 $HOSTIP netmask $HOSTNETMASK broadcast $HOSTBCASTADDR up
/sbin/ifconfig $BRIDGENAME $HOSTIP netmask $HOSTNETMASK broadcast $HOSTBCASTADDR up
# set the default route to the br0 interface
/sbin/route add -net 0.0.0.0/0 gw $HOSTDEFAULTGATEWAY
# bridge in the tap device
/usr/sbin/brctl addif br0 tap0
/sbin/ifconfig tap0 0.0.0.0
/usr/sbin/brctl addif $BRIDGENAME $TAPNAME
/sbin/ifconfig $TAPNAME 0.0.0.0
```
Verify you have the TAP0 and BR0 interfaces and check you have internet access.