Multiple IP addresses on Debian
Wed, 05/12/2007 - 10:29pm — tumbleweed
Quick post. If you have multiple IP addresses (i.e. a range) assigned to you server, and you want to listen on all of them (i.e. multiple SSL sites), then rather than using the ancient eth0:1 syntax, you can hack /etc/network/interfaces to use iproute2 properly.
Assuming the IP 10.2.3.4, with the extra range of 10.5.4.110-10.5.4.118 (yes these extra ranges often ignore class-boundries):
auto eth0
iface eth0 inet static
address 10.2.3.4
netmask 255.255.255.0
network 10.2.3.0
broadcast 10.2.3.255
gateway 10.2.3.1
# Extra IPs:
post-up for last in `seq 110 118`; do ip addr add 10.5.4.$last/32 dev $IFACE; done || true
pre-down for ip in `ip addr show dev $IFACE | sed -n ‘s@.* inet \([0-9.]*/32\) .*@\1@ p’`; do ip addr del $ip dev $IFACE; done || true
iface eth0 inet static
address 10.2.3.4
netmask 255.255.255.0
network 10.2.3.0
broadcast 10.2.3.255
gateway 10.2.3.1
# Extra IPs:
post-up for last in `seq 110 118`; do ip addr add 10.5.4.$last/32 dev $IFACE; done || true
pre-down for ip in `ip addr show dev $IFACE | sed -n ‘s@.* inet \([0-9.]*/32\) .*@\1@ p’`; do ip addr del $ip dev $IFACE; done || true
Yes, it’s ugly as shit, but I can’t think of a neater way to do it.
Update: Better solution
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[...] Multiple IP addresses on Debian [...]
Ubuntu (probably Debian too) r
Ubuntu (probably Debian too) runs scripts in the sub-directories
Oops... sorry... "if-pre-up.d"
Oops... sorry...
"if-pre-up.d", if-up.d", "if-down.d" and "if-post-down.d" of /etc/network. I create a script called /etc/network/if-up.d/routes for additional IP addresses and special routes, based on this template:
if [ "$IFACE" = "eth0" ]; then
# Do "ip addr add" and "ip route add" here
fi
I have what I think is a prett
I have what I think is a prettier solution at http://andyk.za.net/Blog/2007/12/07_-_Multiple_IP_Addresses_in_Ubuntu
addresses script
This might be a better solution: http://wertarbyte.de/debian/addresses
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