A friend of mine help me work this out. 
FreeIPA install script is checking to see if the IP is the same as the 
broadcast address. 
I've never hosted a VPS server so I'm not sure of the IP mask could have been 
better configured? 
----------------------------------------------------------------------------------------
venet0:0  Link encap:UNSPEC  HWaddr 
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:100.111.111.1  P-t-P:100.111.111.1  Bcast:100.111.111.1  
Mask:255.255.255.255
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
----------------------------------------------------------------------------------------


The workaround:
/usr/lib/python2.6/site-packages/ipapython/ipautil.py line 145  as below.. 
remark all 4 lines and it'll continue

    """
    if addr == net.network:
    raise ValueError("cannot use IP network address")
    if addr.version == 4 and addr == net.broadcast:
    raise ValueError("cannot use broadcast IP address")
    """
                    
cya

Craig

On Wed, Feb 08, 2012 at 03:39:34PM +1100, Craig T wrote:
> Hi,
> 
> Is IPA somehow restricted from running on machines with a public IP address?
> 
> I'm attempting to install IPA for practise on my Linux VPS (Centos 6.2 
> x86_64);
> ipa-admintools-2.1.3-9.el6.x86_64
> ipa-client-2.1.3-9.el6.x86_64
> ipa-pki-ca-theme-9.0.3-7.el6.noarch
> ipa-pki-common-theme-9.0.3-7.el6.noarch
> ipa-python-2.1.3-9.el6.x86_64
> ipa-server-2.1.3-9.el6.x86_64
> ipa-server-selinux-2.1.3-9.el6.x86_64
> 
> Error:
> ----------------------------------------------------------------------------
> Server host name [mx1.example.com]: 
> 
> root        : DEBUG    will use host_name: mx1.example.com
> 
> The domain name has been calculated based on the host name.
> 
> Please confirm the domain name [example.com]: 
> 
> root        : DEBUG    read domain_name: example.com
> 
> root        : DEBUG    args=/sbin/ip -family inet -oneline address show
> root        : DEBUG    stdout=1: lo    inet 127.0.0.1/8 scope host lo
> 3: venet0    inet 127.0.0.1/32 scope host venet0
> 3: venet0    inet 100.111.111.1/32 brd 100.111.111.1 scope global venet0:0
> 3: venet0    inet 100.111.111.2/32 brd 100.111.111.2 scope global venet0:1
> 
> root        : DEBUG    stderr=
> Unexpected error - see ipaserver-install.log for details:
> cannot use IP network address
> root        : DEBUG    cannot use IP network address
> File "/usr/sbin/ipa-server-install", line 1151, in <module>
> sys.exit(main())
> 
> File "/usr/sbin/ipa-server-install", line 770, in main
> ip = CheckedIPAddress(hostaddr, match_local=True)
> 
> File "/usr/lib/python2.6/site-packages/ipapython/ipautil.py", line 145, in 
> __init__
> raise ValueError("cannot use IP network address")
> ----------------------------------------------------------------------------
> 
> cya
> 
> Craig
> 
> _______________________________________________
> Freeipa-users mailing list
> Freeipa-users@redhat.com
> https://www.redhat.com/mailman/listinfo/freeipa-users

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