# Configure DHCP on Pix Firewall

###### tags: `cisco` `pix` `dhcp`

Pix image:pix802.bin

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Configure DHCP server on Pix
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Step 1: configure ip address range the Pix DHCP server assignes
Step 2: enable DHCP daemon on pix to listen to DHCP requests from clients
Step 3: specify lease length to grant to the client (default is 3600 second)
Step 4: specify DNS server (option)
Step 5: specify WINS server (option)
Step 6: configure domain name to the client will use (option)


Example:
pixfirewall(config)# dhcpd address 192.168.0.1-192.168.0.253 inside
pixfirewall(config)# dhcpd enable inside
pixfirewall(config)# dhcpd lease 3600
pixfirewall(config)# dhcpd dns 192.168.10.68 192.168.10.73
pixfirewall(config)# dhcpd wins 192.168.10.66
pixfirewall(config)# dhcpd domain cisco.com


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Configure DHCP client on pix
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pixfirewall(config)#interface ethernet0
pixfirewall(config-if)#ip address dhcp [setroute]



Comment#1. setroute option tells the pix to set its default route using the default gateway parameter hat the DHCP server returns. Do not configure a default route when using thesetroute option.

Comment#2. use "show ip address outside dhcp server" and "show ip address outside dhcp lease" command to view current information the DHCP lease.

Comment#3. when configure DHCP client in a VPN connection, use "dhcp-server" command in a tunnel-group. It will assign an IP address from an outside DHCP server. The "ip address dhcp" command can not be used in this way.