ahsan9211110200
asked on
howto use PIX as transparent firewall, no NAT, just traffic monitoring
Hello all
i have PIX 525, and i want to place it infront of my ISP network. Currently the 7500 router is facing the external network. I want to configure PIX transparently , ie not configure NAT for my internal IP's and use PIX just to monitor all of the traffic coming to my corporate network and allow specific traffic for web, ftp and mail machines. Anybody guide me in this regards, i also tried to search some scenarios to get help for this but not scenarios found, please send me some link or guide me in this regards.also guide me that is it recommended to place it infront of the network ????
thanx
mwa
i have PIX 525, and i want to place it infront of my ISP network. Currently the 7500 router is facing the external network. I want to configure PIX transparently , ie not configure NAT for my internal IP's and use PIX just to monitor all of the traffic coming to my corporate network and allow specific traffic for web, ftp and mail machines. Anybody guide me in this regards, i also tried to search some scenarios to get help for this but not scenarios found, please send me some link or guide me in this regards.also guide me that is it recommended to place it infront of the network ????
thanx
mwa
ASKER
hello
but we can assign IP addres to the outside interface of the firewall then what's the problem in using it as transparent ????????
waiting
but we can assign IP addres to the outside interface of the firewall then what's the problem in using it as transparent ????????
waiting
ASKER
hello all
i can't find the satisfied answer of my question, so i have now changed my firewall behaviour. Now i have placed my firewall behind transit router. now i m getting a problem. traffice from my external interface to internal interface is Ok according to the access list, and inside to outside is also fine, but when i tried to pass the traffic throug hmain router , it is not working fine, plz tel me know , wat to do now ??????
thanx
i can't find the satisfied answer of my question, so i have now changed my firewall behaviour. Now i have placed my firewall behind transit router. now i m getting a problem. traffice from my external interface to internal interface is Ok according to the access list, and inside to outside is also fine, but when i tried to pass the traffic throug hmain router , it is not working fine, plz tel me know , wat to do now ??????
thanx
PIX is a firewall, not a router ?
What do you mean by transparent - do you mean like a layer 2 switch is ?
What do you mean by transparent - do you mean like a layer 2 switch is ?
ASKER
yes
now i want just monitoring. i m placing it inside my network. i have applied accesslist to allow http, ftp , SMTP and pop request from outside to my inside interface, but when i request from outside for http or request for http from inside, it's not working, i m pasting the running config, here
PIX#
: Saved
:
PIX Version 6.3(3)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
hostname pixfirewall
domain-name asia.pix
clock timezone PKT 5
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 101 permit tcp any host x.y.z.a eq telnet
access-list 101 permit tcp any host x.y.z.a eq domain
access-list 101 permit tcp any host x.y.z.a eq ssh
access-list 101 permit tcp any host x.y.z.a eq www
access-list 101 permit udp any any eq domain
access-list 101 permit icmp any host x.y.z.a
access-list 101 permit tcp any any
access-list 101 permit icmp any any
access-list acl_in permit tcp any host x.y.z.a eq ssh
pager lines 20
logging on
logging trap notifications
logging device-id ipaddress inside
logging host inside x.y.z.a
icmp permit any outside
icmp permit any inside
icmp deny any intf2
mtu outside 1500
mtu inside 1500
mtu intf2 1500
mtu intf3 1500
ip address outside x.y.z.a x.y.z.a
ip address inside x.y.z.a x.y.z.a
no ip address intf2
no ip address intf3
ip audit info action alarm
ip audit attack action alarm
no failover
failover timeout 0:00:00
failover poll 15
no failover ip address outside
no failover ip address inside
no failover ip address intf2
no failover ip address intf3
pdm location x.y.z.a x.y.z.a inside
pdm history enable
arp timeout 14400
static (inside,outside) 200.1.2.3 200.1.2.3 netmask 255.255.255.255 0 0
access-group 101 in interface outside
access-group 101 in interface inside
route outside 0.0.0.0 0.0.0.0 200.45.144.129 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
http server enable
http x.y.z.a 255.255.255.255 inside
snmp-server host inside x.y.z.a
no snmp-server location
snmp-server contact waseem
snmp-server community Pix@Asia
no snmp-server enable traps
tftp-server inside x.y.z.a /source
floodguard enable
sysopt connection permit-pptp
telnet a.b.c.d 255.255.255.255 inside
telnet timeout 30
ssh a.b.c.d 255.255.255.255 inside
ssh timeout 50
management-access inside
console timeout 60
terminal width 80
banner motd Speed
Cryptochecksum:edc79bf355d
: end
i have removed unrelated lines
thanx
waiting for the answerr
ahsan9211
To go from outside in, you need static NAT, plus the access lists.
I can see static NAT for 200.1.2.3 - if this is x.y.z.a then you're on the right track.
BUT, as you've only two interfaces, you can't do identity NAT (200.1.2.3 to 200.1.2.3)
I can see static NAT for 200.1.2.3 - if this is x.y.z.a then you're on the right track.
BUT, as you've only two interfaces, you can't do identity NAT (200.1.2.3 to 200.1.2.3)
ASKER
hello
but both of the ourside and inside network have different net ID's. and i m using NAT x x just for that i don't wannt to do natting, ie on the inside i have the machines with live IP's and i don't want NAT on the PIX so i just do NAT X X ,
i can't understand where my trafic is lagging , i m also using syslog, but no success
thanx
but both of the ourside and inside network have different net ID's. and i m using NAT x x just for that i don't wannt to do natting, ie on the inside i have the machines with live IP's and i don't want NAT on the PIX so i just do NAT X X ,
i can't understand where my trafic is lagging , i m also using syslog, but no success
thanx
Config guide here:
http://cisco.com/en/US/products/sw/secursw/ps2120/products_configuration_guide_book09186a0080172852.html
I understand what you need now - and yes, it is possible if there are different net IDs on either side.
http://cisco.com/en/US/products/sw/secursw/ps2120/products_configuration_guide_book09186a0080172852.html
I understand what you need now - and yes, it is possible if there are different net IDs on either side.
ASKER
hello
thanx but i have alreay gone through these articles but my problem is still not solved.
my configuration is given above and i think that everything is fine but still its creating problem. plz read the above config and advise me that what may be the problem .
me
thanx but i have alreay gone through these articles but my problem is still not solved.
my configuration is given above and i think that everything is fine but still its creating problem. plz read the above config and advise me that what may be the problem .
me
You need static NAT in order to get from the outside to the inside.
If you want more details, then you will need to post up more points.. ;)
If you want more details, then you will need to post up more points.. ;)
ASKER
i think this is very basic question and not needed any more points.
just a global statement and a static statement needed, but ok if u want this ,
i m adding 50 more points, now waiting for the answer
than in advance
just a global statement and a static statement needed, but ok if u want this ,
i m adding 50 more points, now waiting for the answer
than in advance
ASKER
still no response,
i'll wait for last1week then i'll close the question
bye
i'll wait for last1week then i'll close the question
bye
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I believe transparency will be addressed in a later release of software.