I have installed isc-dhcp-server on one machine and configured to send wpad address:
option local-proxy-config code 252 = text;
subnet 192.168.1.0 netmask 255.255.255.0 { ## dhcp start and end IP range ## range 192.168.1.140 192.168.1.144; option local-proxy-config ""; option subnet-mask 255.255.255.0; ## subnet option broadcast-address 192.168.1.255; ## broadcast option routers 192.168.1.1; ## router IP}
then did dhcpd -t and restarted server, and then I wanted to test the option from another machine, so I used dhcping:
sudo dhcping -iV -s 192.168.1.98 -h 01:02:03:04which gave me:
op: 2
htype: 1
hlen: 4
hops: 0
xid: b8990b59
secs: 0
flags: 0
ciaddr: 0.0.0.0
yiaddr: 0.0.0.0
siaddr: 192.168.1.98
giaddr: 0.0.0.0
chaddr: 01:02:03:04:00:00:00:00:00:00:00:00:00:00:00:00
sname : .
fname : .
option 53 DHCP message type DHCP message type: 5 (DHCPACK)
option 54 Server identifier Server identifier: 192.168.1.98
option 1 Subnet mask Subnet mask: 255.255.255.0
closeserver didn't log any warning or something:
May 5 01:12:43 node2 dhcpd: DHCPACK to 192.168.1.251 (01:02:03:04) via eth0
May 5 01:14:31 node2 dhcpd: DHCPINFORM from 192.168.1.251 via eth0can anyone please tell me why am I not getting 252 option?
1 Answer
By default, client has to request the option for the server to send it.
You can use these lines in the dhcpd.conf file to force some options:
if exists dhcp-parameter-request-list { option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,fc);
}Note: code 252 = 0xfc
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