On Tue, Jul 01, 2008 at 06:27:16 +0000,
g <geleem(a)bellsouth.net> wrote:
my understanding was that 'ifdown' _stopped_ traffic thru port interface.
I tried downing interfaces and the route tables looked to be properly
updated. Maybe there is an issue when you have downed all of the external
interfaces? (I didn't want to down my ppp link at this moment, so I didn't
test that case.)
with 'ifdown eth0'
[geo@argosyiayia ~]$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:07:95:2b:26:23 brd ff:ff:ff:ff:ff:ff
[geo@argosyiayia ~]$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:07:95:2b:26:23 brd ff:ff:ff:ff:ff:ff
Well that didn't really down the device, but it did remove the net block
associated with it, so I wouldn't expect any IP traffic to be sent from it.
It might still respond to external layer 2 packets sent to it. But that
wouldn't explain outbound packets matched up with when you try to run
firefox.
with 'ifup eth0'
[geo@argosyiayia ~]$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:07:95:2b:26:23 brd ff:ff:ff:ff:ff:ff
[geo@argosyiayia ~]$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:07:95:2b:26:23 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.97/24 brd 192.168.1.255 scope global eth0
inet6 fe80::207:95ff:fe2b:2623/64 scope link
valid_lft forever preferred_lft forever