Loopback on a PIX515?

[doogiemcfly]

I am guessing it is called a loopback connection, but I want to access an external translated address, say with FTP, internally. My old non Cisco firewall allowed this connection, my PIX will not. My workaround is to use the internal (private) address which isnt good for testing. Any thoughts?

 

[themut]

Well if you are running 6.2 or later you need to add the dns keyword to your static translation:

static (inside,GBnet) <public-ip> <private-ip> netmask 255.255.255.255 dns

If you are running earlier versions you need the alias command:

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a0080094aee.shtml

 

[doogiemcfly]

I am running version 6.3 and tried the command above with no success. The "alias" command seems more logical but there is no DNS server other than my ISP and there is no DMZ. I don't think I need to change the access list since there is already access from the outside world. I will post my running config... the outside ip address in question is x.x.x.13, again I just want to FTP using the outside address internally. Thanks for your response!

PIX Version 6.3(1)
interface ethernet0 auto
interface ethernet1 auto
interface ethernet2 auto shutdown
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 intf2 security4
enable password encrypted
passwd encrypted
hostname
domain-name
clock timezone PST -8
clock summer-time PDT recurring
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol icmp error
fixup protocol ils 389
fixup protocol pptp 1723
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
names
access-list acl_inbound permit tcp any host x.x.x.13 eq ftp
access-list acl_inbound permit icmp any any echo-reply
access-list acl_inbound permit icmp any any time-exceeded
access-list acl_inbound permit icmp any any unreachable
access-list acl_outbound permit ip any any
access-list inside_outbound_nat0_acl permit ip any 192.168.0.0 255.255.255.0
pager lines 24
logging on
logging timestamp
logging trap errors
logging host inside 192.168.0.80
icmp deny any outside
mtu outside 1500
mtu inside 1500
mtu intf2 1500
ip address outside x.x.x.30 255.255.255.225
ip address inside 192.168.0.2 255.255.255.0
no ip address intf2
ip audit info action alarm
ip audit attack action alarm
pdm location 192.168.0.19 255.255.255.255 inside
pdm location 192.168.0.0 255.255.255.0 inside
pdm location 192.168.0.80 255.255.255.255 inside
pdm location 192.168.0.0 255.255.255.0 outside
pdm history enable
arp timeout 14400
global (outside) 10 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 10 0.0.0.0 0.0.0.0 0 0
static (inside,outside) x.x.x.13 192.168.0.19 netmask 255.255.255.255 0 0
access-group acl_inbound in interface outside
access-group acl_outbound in interface inside
route outside 0.0.0.0 0.0.0.0 x.x.x.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 RADIUS (inside) host 192.168.0.60 timeout 10
aaa-server LOCAL protocol local
ntp server 192.168.0.13 source inside prefer
http server enable
http 192.168.0.80 255.255.255.255 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
sysopt connection permit-pptp
sysopt connection permit-l2tp
crypto ipsec transform-set
isakmp enable outside
isakmp nat-traversal 20
telnet 192.168.0.0 255.255.255.0 inside
telnet timeout 5
ssh timeout 5
console timeout 0
terminal width 80
Cryptochecksum:
: end

 

[themut]

Try implementing dns doctoring with the alias command. It should work... after you issue the alias command try clearing the xlate table "clear xlate".