gateway-test.sh

• This script must be run as root on a mashine that is in Freifunk

• Before the first start, it will tell you to activate the rp_filter with:

    sysctl -w net.ipv4.conf.$INTERFACE.rp_filter=0
  

Usage

# dependency
apt-get install -y dhcping

# clone this repository
git clone https://github.com/freifunk-kiel/gateway-test.sh
cd gateway-test.sh

# start the bash script as root
sudo ./gateway-test.sh

Options

--help  show this README.md
-g      gatewaylist, for example sudo gateway-test.sh -g "13.gw/10.187.53.1/fd42:eb49:c0b5:4242::fd13"
-v      verbose mode

Configuration

If you want to add your own community:

• define a list of gateways to test in the array DEFAULT_GATEWAYS
• define your interface which should be used for pinging a remote host for example br-freifunk or wlan0
• define a dns record you like to receive at TARGET_DNS_RECORD and which should resolve in TARGET_DNS_FFKI_RECORD

Tests

• test Gateway reachability
• Gateway functionality ping
• Gateway functionality ping6
• DHCP test
• Nameserver test with nslookup $TARGET_DNS_RECORD
• Nameserver test for an own domain of the Community
• Check for duplicate Nameserver SOA Record
• test ping in different sizes and show the maximum package size which can be transmitted

manual test:

gw=10.116.152.1
FWMARK=100
ROUTING_TABLE=100
ip rule add fwmark ${FWMARK} table ${ROUTING_TABLE}
ip route add 0.0.0.0/1 via $gw table ${ROUTING_TABLE}
ip route add 128.0.0.0/1 via $gw table ${ROUTING_TABLE}
ip route replace unreachable default table ${ROUTING_TABLE}

ping -m 100 -I wlp1s0 -c 2  -i .2 -W 2 -q 217.70.197.62

#cleanup:
ip route flush table ${ROUTING_TABLE}
ip rule del fwmark ${FWMARK} table ${ROUTING_TABLE}