Pix basic configuration

ettore.granato — Fri, 21 Feb 2020 07:36:53 GMT

I have a Cisco PIX 501 Firewall and I am trying to change its IP internal address.

From the dafault 192.168.1.1 I'm trying to change it to 192.169.x.x with the subnet 255.255.255.0.

The error message that appears is "Interface address is not on same subnet as DHCP pool" and the address changes itself back to 192.168.1.1.

I'm not using DHCP on firewall because it's active on server.

Re: Pix basic configuration

piseli — Fri, 03 Sep 2004 15:04:59 GMT

Are you sure you do not have a "ip local pool" or a DHCP Server configured on your PIX ?

Check if you find this lines in your config:

1.)

ip local pool YOURPOOLNAME 192.168.1.x-192.168.1.x

if yes just remove it with:

no ip local pool YOURPOOLNAME 192.168.1.1-192.168.1.10

or you have a DHCP configured like that:

dhcpd address 192.168.1.x-192.168.1.x inside

dhcpd dns dnsIP1 dnsip2

dhcpd lease 3600

dhcpd ping_timeout 750

dhcpd yourdomain

dhcpd enable inside

Remove it:

[no] dhcpd address ip1[-ip2] if_name

[no] dhcpd auto_config [outside]

[no] dhcpd dns dns1 [dns2]

[no] dhcpd wins wins1 [wins2]

[no] dhcpd lease lease_length

[no] dhcpd domain domain_name

[no] dhcpd enable if_name

[no] dhcpd option 66 ascii {server_name | server_ip_str}

[no] dhcpd option 150 ip server_ip1 [ server_ip2]

no dhcpd option code

[no] dhcpd ping_timeout timeout

[no] debug dhcpd event

[no] debug dhcpd packet

show dhcpd [binding|statistics]

and then change your inside IP address:

sincerly

Patrick