Hi Guys,
Just wondering for some reason when I switched providers(DSL) IP aliasing
stopped working. And, I am not sure what kind of modem this is, the previous
one had some Ethernet ports at the back(it has a bult-in 4 port switch) the
new doesn't have one, only a single Ethernet port and It is directly
connected to my Linux box.
My provider gave me a /24 subnet and 9 useable IP's.
# ip a s eth2
6: eth2: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:08:a1:72:c1:f5 brd ff:ff:ff:ff:ff:ff
inet xxx.xxx.xxx.50/24 brd xxx.xxx.xxx.255 scope global eth2
inet xxx.xxx.xxx.51/24 brd xxx.xxx.xxx.255 scope global secondary eth2
inet xxx.xxx.xxx.52/24 brd xxx.xxx.xxx.255 scope global secondary eth2
inet xxx.xxx.xxx.53/24 brd xxx.xxx.xxx.255 scope global secondary eth2
inet xxx.xxx.xxx.54/24 brd xxx.xxx.xxx.255 scope global secondary eth2
inet xxx.xxx.xxx.55/24 brd xxx.xxx.xxx.255 scope global secondary eth2
inet xxx.xxx.xxx.56/24 brd xxx.xxx.xxx.255 scope global secondary eth2
inet xxx.xxx.xxx.57/24 brd xxx.xxx.xxx.255 scope global secondary eth2
inet xxx.xxx.xxx.58/24 brd xxx.xxx.xxx.255 scope global secondary eth2
-- settings --
ip link set eth2 up
ip addr flush dev eth2
ip addr add xxx.xxx.xxx.50/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.51/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.52/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.53/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.54/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.55/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.56/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.57/24 brd xxx.xxx.xxx.255 dev eth2
ip addr add xxx.xxx.xxx.58/24 brd xxx.xxx.xxx.255 dev eth2
ip route add default via xxx.xxx.xxx.1
--- end settings ---
/proc/sys/net/ipv4/ip_forward is 1
/proc/sys/net/ipv4/ip_dynaddr is 1
works: ping google.com -I eth2
works: ping google.com -I xxx.xxx.xxx.50
not working: ping google.com -I xxx.xxx.xxx.58
>From the outside I can ping xxx.xxx.xxx.50 but cannot ping any secondary
IP's.
I tried tcpdump but didn't receive any replies from the secondary ip's I got
replies from the primary IP though.
If I remove the secondary IP's and use it on another computer the secondary
IP works. It looks like I can
only use 1 IP per computer(per mac). What seems to be the problem? Is it the
modem? I am not sure about adsl's and their type of settings (bridge/router)
and I would like to contact my provider. But I am having troubles on asking
them regarding the problem. If there's a technical explanation regarding
this or some trick it would help me clarify them or me.
There are no filters involved(iptables). On my previous provider aliasing
works both are dsl's.
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