11-02-2013 02:51 PM - edited 03-11-2019 07:59 PM
Hi all, I'm trying to find the best approach on getting my ASA to replace our Juniper, we have public ip's from our isp and it's set to nat the gateway and mip the inside ip's to outside public ip's.
I tried hooking up the asa into the leased router, added my inside rules to be accessed outside but not able to get to the web or ping, I read that nat is not needed on the ASA in transparent mode though it's possible, but in my setup with our isp I may need to use nat or could I go away with it, what would be my best option to get this setup, any samples or links would be great.
Thanks,
Carlo
Solved! Go to Solution.
11-04-2013 04:33 PM
Sorry I did not get the concept, maybe if you could explain this a bit better.
11-04-2013 04:51 PM
Jumora, here's a sample setup -
old firewall (untrust = 12.1.1.1) ip of leased router (this was the outside ip gateway I think I can't see in the router since it's not managed by us, but it's nat'd to our internal gateway ip) >(trust = 101.2.2.2) this is our internal gateway ip
that's the current setting in the juniper
so on the asa, the new config for nat would be
nat (inside,outside) static mygateway - then we can still use 101.2.2.2 as gateway, I think this is what I'm missing to get an open connection to the outside.
11-04-2013 05:27 PM
I get you, yeah NAT, go for it so that the upstream router can add it to the ARP table. Also add the routes that Julio mentioned for routing.
11-06-2013 09:36 AM
11-06-2013 10:37 AM
Give me logs I need to see logs to see what is the ASA indicating.
11-06-2013 11:23 AM
here's my sh logging output, can't get the whole log to show in putty, but these are focused on the bvi int, it seems to show a bunch of errors or teardowns that I also see when looking at asdm latest syslog message. I added a simple network topology diagram. Any help would be great
11-07-2013 09:04 AM
We're you able to look into my logs, is there any other way to see what's happening in the traffic inside the asa besides logs.
11-07-2013 11:20 AM
What address where you trying to reach??
11-07-2013 01:11 PM
I'm trying to get traffic to go through the asa, inside to outside, here's what my juniper's route config looks like compared to the asa, I know it's something with route cause as soon as I plugged the asa to the isp's router which is a outside public ip it stopped letting traffic through, I added a route from some config samples I've read around the forum that I thought would work just by changing the ip's but no avail, hopefully these configs will tell you something missing on the asa.
ASA
interface Ethernet0/0
nameif outside
bridge-group 1
security-level 0
!
interface Ethernet0/1
nameif inside
bridge-group 1
security-level 100
!
interface Ethernet0/2
shutdown
no nameif
no security-level
!
interface Ethernet0/3
shutdown
no nameif
no security-level
!
interface Management0/0
management-only
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
!
interface BVI1
ip address 208.x.x.11 255.255.255.0
!
boot system disk0:/asa912-8-k8.bin
ftp mode passive
clock timezone PST -8
clock summer-time PDT recurring
dns domain-lookup inside
dns server-group DefaultDNS
name-server 208.x.x.12
domain-name domain.com
object network cirexxintl
host 208.x.x.85
object network cirexxintldc
host 208.x.x.12
object network crxmail
host 208.x.x.3
object network att
host 12.x.x.33
object network int-gateway
host 208.x.x.1
object-group protocol TCP_UDP
description Grouping of TCP and UDP protocols
protocol-object tcp
protocol-object udp
object-group service All-service
service-object gre
service-object icmp echo
service-object tcp destination eq www
service-object udp destination eq domain
service-object tcp destination eq https
service-object tcp destination eq pop3
service-object tcp destination eq smtp
service-object tcp destination eq domain
object-group network internal-servers
network-object object cirexxintl
network-object object cirexxintldc
network-object object crxmail
access-list inside_access_out extended permit object-group All-service object-group internal-servers any
access-list inside_access_out extended permit object-group TCP_UDP object-group internal-servers any
pager lines 24
arp timeout 14400
no arp permit-nonconnected
access-group inside_access_out out interface inside
object network int-gateway
nat (inside,outside) static att
route outside 0.0.0.0 0.0.0.0 12.x.x.33 1
Juniper
ns25-> get route
IPv4 Dest-Routes for (0 entries)
--------------------------------------------------------------------------------
H: Host C: Connected S: Static A: Auto-Exported
I: Imported R: RIP P: Permanent D: Auto-Discovered
iB: IBGP eB: EBGP O: OSPF E1: OSPF external type 1
E2: OSPF external type 2
IPv4 Dest-Routes for (4 entries)
--------------------------------------------------------------------------------
ID IP-Prefix Interface Gateway P Pref Mtr Vsys
--------------------------------------------------------------------------------
* 1 208.x.x.0/24 eth1 0.0.0.0 C 0 0 Root
* 4 12.x.x.34/32 eth3 0.0.0.0 H 0 0 Root
* 3 12.x.x.32/27 eth3 0.0.0.0 C 0 0 Root
* 2 208.x.x.1/32 eth1 0.0.0.0 H 0 0 Root
ns25-> get route source
S: Static P: Permanent
Src-Routes for (1 entries)
--------------------------------------------------------------------------------
ID IP-Prefix Interface Gateway P Pref Mtr Vsys
--------------------------------------------------------------------------------
* 1 208.x.x.0/24 eth3 12.x.x.33 S 20 1 Root
11-07-2013 01:36 PM
arp permit-nonconnected
11-07-2013 01:39 PM
Why this route?
route outside 0.0.0.0 0.0.0.0 12.x.x.33 1
If you BVI has an IP of
interface BVI1
ip address 208.x.x.11 255.255.255.0
11-07-2013 02:24 PM
it worked when I had it set in the lab inside my internal network when all the ip's were the same, but as soon as I plugged it on the actual isp router it stopped working, that's why I was looking at either routing or nat, I read your supposed to set route if you have an external ip like for example a modem or router and point to your outside int facing the router, One thing I noticed when I connect to the router, under monitoring and then routing, it shows the connected outside route for the isp, still can't ping or browse though.
11-07-2013 04:32 PM
Hello,
Can you provide us the updated config ,
I will take a look at it as soon as you do it
Rate all of the helpful posts!!!
Regards,
Jcarvaja
Follow me on http://laguiadelnetworking.com
11-07-2013 04:38 PM
Here you go,
crxasa# sh run
: Saved
:
ASA Version 9.1(2)8
!
firewall transparent
hostname crxasa
domain-name domain.com
enable password jtiwndTuzIDdTcxA encrypted
names
!
interface Ethernet0/0
nameif outside
bridge-group 1
security-level 0
!
interface Ethernet0/1
nameif inside
bridge-group 1
security-level 100
!
interface Ethernet0/2
shutdown
no nameif
no security-level
!
interface Ethernet0/3
shutdown
no nameif
no security-level
!
interface Management0/0
management-only
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
!
interface BVI1
ip address 208.x.x.11 255.255.255.0
!
boot system disk0:/asa912-8-k8.bin
ftp mode passive
clock timezone PST -8
clock summer-time PDT recurring
dns domain-lookup inside
dns server-group DefaultDNS
name-server 208.x.x.12
domain-name domain.com
object network cirexxintl
host 208.x.x.85
object network cirexxintldc
host 208.x.x.12
object network crxmail
host 208.x.x.3
object network gateway
host 12.x.x.34
object-group protocol TCP_UDP
description Grouping of TCP and UDP protocols
protocol-object tcp
protocol-object udp
object-group service All-service
service-object gre
service-object icmp echo
service-object tcp destination eq www
service-object udp destination eq domain
service-object tcp destination eq https
service-object tcp destination eq pop3
service-object tcp destination eq smtp
service-object tcp destination eq domain
object-group network internal-servers
network-object object cirexxintl
network-object object cirexxintldc
network-object object crxmail
access-list inside_access_out extended permit object-group All-service object-group internal-servers any
access-list inside_access_out extended permit object-group TCP_UDP object-group internal-servers any
pager lines 24
logging enable
logging buffer-size 1048576
logging buffered debugging
logging asdm informational
mtu outside 1500
mtu inside 1500
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-714.bin
no asdm history enable
arp timeout 14400
arp permit-nonconnected
nat (inside,outside) source dynamic any internal-servers
access-group inside_access_out out interface inside
route outside 0.0.0.0 0.0.0.0 12.x.x.33 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
aaa authentication ssh console LOCAL
http server enable
http 0.0.0.0 0.0.0.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
crypto ipsec security-association pmtu-aging infinite
crypto ca trustpool policy
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 management
ssh timeout 15
ssh key-exchange group dh-group1-sha1
console timeout 0
threat-detection basic-threat
threat-detection statistics port
threat-detection statistics protocol
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
username admin password 571.UcWz1aqKyGh3 encrypted
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
inspect icmp
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:38c3e7a94d8863770e325b9dcc564360
: end
crxasa#
11-07-2013 06:15 PM
Hi carlo,
How's everything going buddy????
Man are all of the inside hosts on the network 208.x.x.0/24 ?
Rate all of the helpful posts!!!
Regards,
Jcarvaja
Follow me on http://laguiadelnetworking.com
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