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Internal network Pix configuration

We have a lab area that is used by customers for internet.   We have a Pix 515 firewall that we have placed between that lab and the rest of the lan.  The idea is that the Pix will help us to control the traffic originating from this lab.

I need help with creating a very simple configuration in which traffic is brought in from the lab on E0 and then passed to E1 where it enters the rest of the network traffic.   We are not ready to examine or log packets so I don't want to complicate this.   Just looking for the most basic configuration template to pass traffic through.  Both lab and lan are on the same subnet - basic class c.



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egalois
Asked:
egalois
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3 Solutions
 
Ernie BeekCommented:
Below is a factory default config of a pix. The only thing you should need to change are the ip ranges to the ones you need.

Building configuration...
: Saved
:
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname pixfirewall
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
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside dhcp setroute
ip address inside 192.168.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
timeout xlate 0:05:00
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 sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
http server enable
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd address 192.168.1.2-192.168.1.33 inside
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80
Cryptochecksum:d41d8cd98f00b204e9800998ecf8427e
: end
[OK]
pixfirewall#


Let me know if you need any further help with this.

Oh, one thing (just saw that). Lab and lan need to be different subnets.
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egaloisAuthor Commented:
Is there no way to do this with them on the same subnet?
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Ernie BeekCommented:
I'm afraid not. That's the nature of a firewall: it has to be in between networks.
Is there any reason why that might be a problem?
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egaloisAuthor Commented:
If I give the devices in this lab a new subnet, will the pix515 suffice to route traffic to and from the lab?
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Ernie BeekCommented:
No problem. It will Nat the traffic to the outside address of the pix, which is on the LAN. You can also let the pix act as a dhcp server for the lab network.
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egaloisAuthor Commented:
Thanks
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Ernie BeekCommented:
You're welcome, thx for the points :)
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