dhcpd related issue - not giving up

krad kraduk at googlemail.com
Sun Nov 1 11:09:32 UTC 2009


2009/11/1 Dánielisz László <laszlo_danielisz at yahoo.com>

> I don't give it up, doing some tcpdump on my BSD I can see the dhcp request
> reaches the machine, the dhcpd is running, but why doesn't gives any IP?
>
> # tcpdump -i rl1 -n port 67 or port 68
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on rl1, link-type EN10MB (Ethernet), capture size 96 bytes
> 11:51:43.086597 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:24:03:f1:bd:36, length 300
> 11:51:45.102260 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:24:03:f1:bd:36, length 300
> 11:51:49.114960 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:24:03:f1:bd:36, length 300
> 11:51:57.150734 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:24:03:f1:bd:36, length 300
> 11:51:59.157311 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:24:03:f1:bd:36, length 300
> 11:52:03.160029 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:24:03:f1:bd:36, length 300
> 11:57:09.770520 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:23:6c:86:41:d9, length 300
> 11:57:11.941379 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:23:6c:86:41:d9, length 300
> 11:57:14.928398 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:23:6c:86:41:d9, length 300
> 11:57:16.378911 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:23:6c:86:41:d9, length 300
> 11:57:17.703219 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:23:6c:86:41:d9, length 300
> 11:57:18.839763 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request
> from 00:23:6c:86:41:d9, length 300
>
>
>
>
>
>
> ________________________________
> From: Dánielisz László <laszlo_danielisz at yahoo.com>
> To: freebsd-questions at freebsd.org
> Sent: Sun, November 1, 2009 11:06:36 AM
> Subject: Re: dhcpd related issue
>
> I had one more idea: try nmap on my dhcp server, and port 67 does not seems
> to be opened, after I tried telneting in and my connection was refused:
>
> $ telnet 192.168.1.1 67
> Trying 192.168.1.1...
> telnet: connect to address 192.168.1.1: Connection refused
> telnet: Unable to connect to remote host
>
> Than I disabled pf
> # pfctl -d
> No ALTQ support in kernel
> ALTQ related functions disabled
> pf disabled
>
> Than I checked telnet/nmap again but still don't found any 67 port ever
> there. I checked again that the dhcpd is running, and its up:
> # ps ax|grep dhcp
>  958  ??  Is     0:00.00 /usr/local/sbin/dhcpd -cf
> /usr/local/etc/dhcpd.conf -lf /var/db/dhcpd/dhcpd.lease
>
> Any idea?
>
>
>
>
> ________________________________
> From: Dánielisz László <laszlo_danielisz at yahoo.com>
> To: patrick <gibblertron at gmail.com>
> Cc: freebsd-questions at freebsd.org
> Sent: Sun, November 1, 2009 8:34:03 AM
> Subject: Re: dhcpd related issue
>
> It's the same, I still don't got any IP address.
>
>
>
>
> ________________________________
> From: patrick <gibblertron at gmail.com>
> To: Dánielisz László <laszlo_danielisz at yahoo.com>
> Cc: freebsd-questions at freebsd.org
> Sent: Sun, November 1, 2009 6:38:31 AM
> Subject: Re: dhcpd related issue
>
> What happens if you disable pf temporarily?
>
> 2009/10/31 Dánielisz László <laszlo_danielisz at yahoo.com>:
> > Hello,
> >
> > I just configured my dhcpd but it gives no IP-s.
> > What had I done until now:
> >
> >  1. Installed isc-dhcp via ports
> >
> > 2. edited the /usr/local/etc/dhcpd.conf
> >
> > option domain-name "bsd";
> > option domain-name-servers <my dns server ip>;
> > option subnet-mask 255.255.255.0;
> > authoritative;
> >
> > default-lease-time 3600;
> > max-lease-time 86400;
> > ddns-update-style none;
> >
> > subnet 192.168.1.0 netmask 255.255.255.0 {
> > range 192.168.1.129 192.168.1.250;
> > option routers 192.168.1.1;
> > }
> >
> > 3. Added the following ones to /etc/rc.conf
> > ifconfig_rl1="inet 192.168.1.1  netmask 255.255.255.0"
> > dhcpd_enable="YES"
> > dhcpd_conf="/usr/local/etc/dhcpd.conf"
> > dhcpd_ifaces="rl1"
> >
> >
> > 4. Opened the adequate port in pf
> > pass in log on rl1 inet proto tcp from 192.168.1.0/24 to 192.168.1.1
> port = bootps flags S/SA keep state
> > pass in log on rl1 inet proto udp from 192.168.1.0/24 to 192.168.1.1
> port = bootps keep state
> >
> > 5.. When I start de daemon:
> > # /usr/local/etc/rc.d/isc-dhcpd start
> > Starting dhcpd.
> > Internet Systems Consortium DHCP Server V3.0.7
> > Copyright 2004-2008 Internet Systems Consortium.
> > All rights reserved.
> > For info, please visit http://www.isc.org/sw/dhcp/
> > Wrote 0 leases to leases file.
> > Listening on Socket/rl1/192.168.1/24
> > Sending on   Socket/rl1/192.168.1/24
> >
> > Everythings looks to be ok there but on the client (I tried OS-X and
> Nokia symbian) I can not obtain the IP address, do you have any idea what
> should I check?
> >
> >
> > Thanks!
> > Laci
> >
> >
> >
> > _______________________________________________
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> > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
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> >
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start with the silly stuff what does ifconfig say for that interface


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