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Re: Make a DHCP server using Fedora - Help



--- On Fri, 11/14/08, Antonio Olivares <olivares14031 yahoo com> wrote:

> From: Antonio Olivares <olivares14031 yahoo com>
> Subject: Re: Make a DHCP server using Fedora - Help
> To: fedora-list redhat com
> Date: Friday, November 14, 2008, 5:52 PM
> --- On Fri, 11/14/08, Antonio Olivares
> <olivares14031 yahoo com> wrote:
> 
> > From: Antonio Olivares <olivares14031 yahoo com>
> > Subject: Re: Make a DHCP server using Fedora - Help
> > To: "Community assistance, encouragement, and
> advice for using Fedora."
> <fedora-list redhat com>
> > Date: Friday, November 14, 2008, 5:42 PM
> > --- On Fri, 11/14/08, Sam Varshavchik
> > <mrsam courier-mta com> wrote:
> > 
> > > From: Sam Varshavchik
> <mrsam courier-mta com>
> > > Subject: Re: Make a DHCP server using Fedora -
> Help
> > > To: "Community assistance, encouragement,
> and
> > advice for using Fedora."
> > <fedora-list redhat com>
> > > Date: Friday, November 14, 2008, 5:23 PM
> > > Antonio Olivares writes:
> > > 
> > > > [root localhost network-scripts]# ifconfig
> -a
> > > > eth0      Link encap:Ethernet  HWaddr
> > > 00:0E:A6:42:59:AF            inet
> addr:10.154.19.210 
> > > Bcast:10.154.19.255  Mask:255.255.255.0
> > > 
> > > Your eth0 has ip 10.154.19.210
> > > 
> > > > [root localhost ~]# dhcpd -f
> > > > Internet Systems Consortium DHCP Server
> 4.0.0
> > > > Copyright 2004-2007 Internet Systems
> Consortium.
> > > > All rights reserved.                        
>   
> > For
> > > info, please visit http://www.isc.org/sw/dhcp/
> > > > Not searching LDAP since ldap-server,
> ldap-port
> > and
> > > ldap-base-dn were not specified in the config
> file    
> >      
> > >                                               
> Wrote 0
> > class
> > > decls to leases file.                            
>     
> >      
> > >      Wrote 0 deleted host decls to leases file.  
>     
> >      
> > >                         Wrote 0 new dynamic host
> decls
> > to
> > > leases file.                                 
> Wrote 0
> > leases
> > > to leases file.                                  
>     
> >      
> > >     
> > > > No subnet declaration for eth0
> (10.154.19.210).
> > > 
> > > dhcpd is telling you, right here, what's
> broken.
> > > 
> > > > # This is a very basic subnet declaration.
> > > > 
> > > > subnet 10.254.239.0 netmask 255.255.255.224
> {
> > > >   range 10.254.239.10 10.254.239.20;        
>  
> > option
> > > routers rtr-239-0-1.example.org,
> > rtr-239-0-2.example.org;
> > > > }                                           
>     
> >     
> > >            
> > > 
> > > What's this? Your eth0's IP address is
> > > 10.154.19.210. You need remove all subnet
> declarations
> > in
> > > dhcp.conf, and provide a subnet declaration for
> > > 10.154.19.0/24
> > > 
> > > 
> > > -- 
> > 
> > Ok, 
> > I changed the /etc/dhcpd.conf
> > 
> > and I get [root localhost ~]# dhcpd -f
> > Internet Systems Consortium DHCP Server 4.0.0
> > Copyright 2004-2007 Internet Systems Consortium.
> > All rights reserved.                            
> > For info, please visit http://www.isc.org/sw/dhcp/
> > Warning: subnet 10.154.19.0/27 overlaps subnet
> > 10.154.19.0/24
> > Not searching LDAP since ldap-server, ldap-port and
> > ldap-base-dn were not specified in the config file    
>      
> >                                                
> > Wrote 0 leases to leases file.                        
>     
> >                     
> > Listening on LPF/eth0/00:0e:a6:42:59:af/10.154.19.0/24
>     
> >                     
> > Sending on   LPF/eth0/00:0e:a6:42:59:af/10.154.19.0/24
>     
> >                     
> > Sending on   Socket/fallback/fallback-net
> > ^C
> > [root localhost ~]# service dhcpd start
> > Starting dhcpd:                                       
>    
> > [FAILED]
> > [root localhost ~]# service dhcpd stop
> > [root localhost ~]# service dhcpd start
> > Starting dhcpd:                                       
>    
> > [FAILED]
> > [root localhost ~]# dhcpd -f
> > Internet Systems Consortium DHCP Server 4.0.0
> > Copyright 2004-2007 Internet Systems Consortium.
> > All rights reserved.
> > For info, please visit http://www.isc.org/sw/dhcp/
> > Warning: subnet 10.154.19.0/27 overlaps subnet
> > 10.154.19.0/24
> > Not searching LDAP since ldap-server, ldap-port and
> > ldap-base-dn were not specified in the config file
> > Wrote 0 leases to leases file.
> > Listening on LPF/eth0/00:0e:a6:42:59:af/10.154.19.0/24
> > Sending on   LPF/eth0/00:0e:a6:42:59:af/10.154.19.0/24
> > Sending on   Socket/fallback/fallback-net
> > 
> > 
> > but service still fails :(
> > 
> > [root localhost ~]# service dhcpd start
> > Starting dhcpd:                                       
>    
> > [FAILED]
> > [root localhost ~]# service dhcpd stop
> > [root localhost ~]# service dhcpd start
> > Starting dhcpd:                                       
>    
> > [FAILED]
> > 
> > 
> > Here's file:
> > 
> > [root localhost ~]# cat /etc/dhcpd.conf 
> > # dhcpd.conf                            
> > #                                       
> > # Sample configuration file for ISC dhcpd
> > #                                        
> > 
> > # option definitions common to all supported
> networks...
> > option domain-name "example.org";           
>     
> >       
> > option domain-name-servers ns1.example.org,
> > ns2.example.org;
> > 
> > default-lease-time 600;
> > max-lease-time 7200;   
> > 
> > # Use this to enble / disable dynamic dns updates
> globally.
> > #ddns-update-style none;                              
>     
> > 
> > # If this DHCP server is the official DHCP server for
> the
> > local
> > # network, the authoritative directive should be
> > uncommented.  
> > authoritative;
> > 
> > # Use this to send dhcp log messages to a different
> log
> > file (you also
> > # have to hack syslog.conf to complete the
> redirection).
> > log-facility local7;
> > 
> > # No service will be given on this subnet, but
> declaring it
> > helps the
> > # DHCP server to understand the network topology.
> > 
> > subnet 10.154.19.0 netmask 255.255.255.0 {
> > }
> > 
> > # This is a very basic subnet declaration.
> > 
> > subnet 10.154.19.0 netmask 255.255.255.224 {
> >   range 10.154.19.10 10.154.19.20;
> >   option routers rtr-239-0-1.example.org,
> > rtr-239-0-2.example.org;
> > }
> > 
> > 
> > Thank you for helping out!
> > 
> > Antonio 
> > 
> > 
> >       
> > 
> > -- 
> 
> 
> Quick question:
> 
> Simple troubleshooting steps and tips For DHCP
> 
> If things didn’t go as you excepted–for example, the
> dhcp server didn’t start–you should do a bit of
> troubleshooting. DHCP can be very frustrating to fix. Here
> are a few things to check:
> 
> 1. Configure DHCP to only listen on a specific interface.
> Being explicit is always a safe bet, so you can edit
> /etc/sysconfig/dhcpd and define the interface to listen on.
> For eth0, this would look like:
> 
> # Command line options here
> DHCPDARGS=eth0
> 
> eth0 is the one that gets an IP from the network, The eth1
> is the one that should send the packets to the Networking
> switch which will give out the ips and dns and all. 
> 
> I have installed bind as well.  I am not sure if the
> iptables are masquerading to send the packets out? and also
> I am not sure if the DHCPARGS=eth0 or eth1.
> 
> Thanks,
> 
> Antonio 
> 
> 
> 
>       
> 
> -- 

Breakthrough, changed the ARGS to 
[olivares localhost ~]$ cat /etc/sysconfig/dhcpd
# Command line options here
DHCPDARGS=eth0

and it is working :) 

[root localhost ~]# dhcpd -f
Internet Systems Consortium DHCP Server 4.0.0
Copyright 2004-2007 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
Warning: subnet 10.154.19.0/27 overlaps subnet 10.154.19.0/24
Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file
Wrote 0 leases to leases file.
Listening on LPF/eth0/00:0e:a6:42:59:af/10.154.19.0/24
Sending on   LPF/eth0/00:0e:a6:42:59:af/10.154.19.0/24
Sending on   Socket/fallback/fallback-net
^C
[root localhost ~]# service dhcpd stop
[root localhost ~]# service dhcpd start
Starting dhcpd:                                            [  OK  ]


 but now selinux gets in the way :(

Nov 14 20:03:40 localhost kernel: type=1400 audit(1226714620.135:183): avc:  denied  { read } for  pid=5267 comm="dhcpd" name="dhcpd.pid" dev=dm-0 ino=3244731 scontext=unconfined_u:system_r:dhcpd_t:s0 tcontext=unconfined_u:object_r:var_run_t:s0 tclass=file
Nov 14 20:03:40 localhost kernel: type=1400 audit(1226714620.135:184): avc:  denied  { write } for  pid=5267 comm="dhcpd" name="dhcpd.pid" dev=dm-0 ino=3244731scontext=unconfined_u:system_r:dhcpd_t:s0 tcontext=unconfined_u:object_r:var_run_t:s0 tclass=file
Nov 14 20:03:40 localhost dhcpd: Can't create PID file /var/run/dhcpd.pid: Permission denied.

How can I allow it to work?  


Thanks,

Antonio 


      


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