I happened to upgrade my firewall+webserver and now the firewall part is
bust...
in Feisty I used to bring up my external ip-addresses using commands
like
dhcpcd -I someid eth0:1
dhcpcd -I someotherid eth0:2
but after upgrading to Gutsy today an to Hardy shortly after I found out
dhcp stopped working in the previous upgrade, dhcpcd, ifup with dhcp or
dhclient can't any more do anything to eth0:*. I get
SIOCSIFFLAGS: Cannot assign requested address
and similar error messages. Removing wireless-tools has no effect.
BUT!!
If I do the following:
sudo ifconfig eth0:1 1.2.3.4
dhcpcd -I someid eth0:1
I get
dhcpcd -I someid eth0:1
as I normally should, but still ifconfig shows no eth0:1. Manually
assigned aliases (ifconfig eth0:2 $ip) do show up in ifconfig listings
just as they should.
So, something is broken in the two newest releases. No apparent reason
why dhcp:ing aliases shouldn't work any more.
--
'SIOCSIFFLAGS: Cannot assign requested address' when setting up ip alias
https://bugs.launchpad.net/bugs/123773
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