Package: bridge-utils
Version: 1.5-9
I'm currently using the following setup: dedicated Server ->
bridge-utils (eth0 -> br0)
Once i installed bridge utils and setup my /etc/network/interfaces as
follows:
#source-directory /etc/network/interfaces.d
auto lo
iface lo inet loopback
iface eth0 inet manual
auto br0
iface br0 inet static
address 37.187.163.XYZ
netmask 255.255.255.0
network 37.187.163.0
broadcast 37.187.163.255
gateway 37.187.163.254
bridge_ports eth0
bridge_stp off
bridge_fd 1
bridge_hello 2
bridge_maxage 12
After restarting the system, it becomes inaccessible. This is because of
the following reasons:
1.) net.ipv4.ip_forward is per default set to "0", you have to manually
change it, is this correct? I've thought this setting got adjusted to
"1" automatically in wheezy.
2.) The routing-table gets messed up. Although the system brings up br0
it still tries to default route via eth0 and also a route via eth0 is
existant which should not be the case:
root@server:~# ip route show
default via 37.187.163.254 dev eth0
37.187.163.0/24 dev eth0 proto kernel scope link src 37.187.163.XYZ
37.187.163.0/24 dev br0 proto kernel scope link src 37.187.163.XYZ
To get this fixed you have to manually change the default route to br0
and remove the route via eth0:
ip route delete 37.187.163.0/24 dev eth0
ip route delete default via 37.187.163.254 dev eth0
ip route add default via 37.187.163.254 dev br0
3.) Also, in wheezy the eth0-interface didnt get an ip address assigned
to it when set to manual mode while having a br0 interface, in jessie
this is somehow different:
br0 Link encap:Ethernet HWaddr 00:25:90:a4:6c:ba
inet addr:37.187.163.XYZ Bcast:37.187.163.255
Mask:255.255.255.0
inet6 addr: fe80::225:90ff:fea4:6cba/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:81357 errors:0 dropped:0 overruns:0 frame:0
TX packets:1121 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3808194 (3.6 MiB) TX bytes:111797 (109.1 KiB)
eth0 Link encap:Ethernet HWaddr 00:25:90:a4:6c:ba
inet addr:37.187.163.XYZ Bcast:37.187.163.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:108814 errors:0 dropped:59 overruns:0 frame:0
TX packets:1430 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:18440817 (17.5 MiB) TX bytes:142265 (138.9 KiB)
Memory:fba20000-fba3ffff
eth0 seems to be virtual (Memory:fba20000-fba3ffff) but why does it show
the address of br0 while wheezy did not?
Thanks.
I am using Debian GNU/Linux Jessie, 3.16.0-4-amd64 #1 SMP Debian
3.16.7-ckt9-3~deb8u1 (2015-04-24).
--
Florian Strankowski
Core Solutions
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22083 Hamburg, Germany
web https://coresec.de
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