PIX soho setup

[mjoyner]

I am trying to install my PIX 515E at home. I have Charter Cable that provides DHCP. I am not sure if its is bridged or NAT'd.
When I try to setup my PIX outside interface on the cable modem, my network LED keeps flashing. It smells like a broadcast storm to me. I cannot get a lease on my outside interface.

What can I do to read the packets. I guess if I can't get a lease ...... "I can't get a lease". But I am curious to see what the storm is about and would like to complain to Charter just to escalate a ticket. I have switched out cable modems with my neighbor just to see if it was the modem.

What would be some good suggestions to debug/capture these packets?

[root@netwatch ~]# yum remove windows
Loaded plugins: fastestmirror
Setting up Remove Process
No Match for argument: windows
No Packages marked for removal

OH YEAH!

 

[North323]

lets see a scrubbed config

 

[mjoyner]

North, I will post tonight. Thanks for your repsonse.

My setup is this now:

IP<>CABLEMODEM<>WIRELESS MODEM<>PIX<>192.168.1.0/24

I am double natting, possibly triple, on PIX and wireless modem.


78.x.x.x ....... cable modem
|
78.x.x.x<>172.16.1.1 ...... wireless modem
|
172.16.1.2<>192.168.1.1 ....... pix
|
192.168.1.0/24 ........INTERNAL

It works, I can NAT and PAT, but its on the slow side. I cant get the PIX outside to work.

Will post config tonight.


[root@netwatch ~]# yum remove windows
Loaded plugins: fastestmirror
Setting up Remove Process
No Match for argument: windows
No Packages marked for removal

OH YEAH!

 

[VinceWhirlwind]

Why don't you leave the NATing up to the existing device and let the PIX just take care of filtering?

Do you have a 0.0.0.0 0.0.0.0 route on the PIX pointing at 172.16.1.1?

 

[greenemk]

I agree, just have the PIX plugged into the cable modem and then plug the wireless modem up for WiFi (I assume that all its really used for). I have the setup at my house, so once you post some scrubbed configs, should be able to get you up and running. One question though, can your entire internal network network go behind 192.168.1.X/24, or do you need a seperate DMZ network also?

MG

CCNA, CCNP, Sec+

 

[mjoyner]

GREENMK: Actually, the WIFI is messed up. I am using it as router, to get the lease from the cable modem and provide a as the outside interface for the PIX. When I try to use the PIX and get DHCP lease from the cable modem, I just get a broadcast storm and no lease....... it times out.

I use this command to get a lease:
ip address outside dhcp setroute

(the dhcp for oustide is not in config below)

PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password 2rm.stRg.oi7EtyA encrypted
passwd 2rm.stRg.oi7EtyA encrypted
hostname pix
domain-name pix.localdomain
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list inbound permit tcp any host 172.16.1.2 eq www
pager lines 100
mtu outside 1500
mtu inside 1500
ip address outside 172.16.1.2 255.255.0.0
ip address inside 192.168.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 192.168.1.0 255.255.255.0 0 0
static (inside,outside) tcp interface

http://www 192.168.1.100

http://www netmask

255.255.255.255 0 0
access-group inbound in interface outside
route outside 0.0.0.0 0.0.0.0 172.16.1.1 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
telnet timeout 5
ssh 192.168.1.0 255.255.255.0 inside
ssh timeout 10
console timeout 0
dhcpd address 192.168.1.100-192.168.1.200 inside
dhcpd dns 66.215.64.14 4.2.2.2
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd enable inside
terminal width 100

[root@netwatch ~]# yum remove windows
Loaded plugins: fastestmirror
Setting up Remove Process
No Match for argument: windows
No Packages marked for removal

OH YEAH!