Cisco Firewall :: To Run ZBFW On 2811 With IOS Version 15.3

Jul 31, 2012

I'm trying to run ZBFW on a 2811 with IOS version 15.3(T4) and I'm running into a strange issue I'm not quite sure how to troubleshoot.
 
I have 3 zones, internet, local, and ssl-vpn.The rules I'm trying to enforce are: all traffic from SSL-VPN can go to anywhere, anywhere can go to SSL-VPN. Anything originating from local can go out. Certain ports can come in for DMZ services (http, https, imap/s, pop3/s, submission).
 
After rebooting the router and applying f0/0 and tun0 to internet, f0/1 to local, and virtual-template 1 to ssl-vpn things work fine. But after a while I stop being able to connect to servers at the high end of the subnet. (I have .20 to .26 configured with the services, .20, .21 work fine always, .22 and up stop responding). Remove interfaces from the ZBFW, no problem at all. Apply ZBFW, traffic stops.
 
I'm seeing dropped sessions in the log on zone-pair local-to-internet , invalid flags with ip ident 0 which I think is outbound traffic attempted for no inbound inspect entry, but everything should be allowed out, and the traffic is to port 80 which is allowed by 'match protocol http' on the inbound policy.

Edited config attached (remove passwords and stuff) Last few log lines are at the bottom.

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Cisco Firewall :: 871 / 2811 / 1841 - ZBFW Default Inspection Specification

May 6, 2011

I can't find any specific information on the implementation of packet inspection in a zone based policy firewall.  In other words, is there a specification or even just a set of values that define the default inspection parameters for all protocols?  With DPI I can manage 'some' of the inspection capabilities but I have some fairly rigorous and specific requirements to meet and I need to validate that the IOS ZBFW will meet those requirements.  Specifically, I'm interested in HTTP, DNS, and ICMP but all other protocols would be useful as well.I'm working with basic routers; 871's, 2811's, 1841's, etc.  The IOS in use in most cases is adventerprisek9-mz.151-3.T.

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Cisco Firewall :: 7204 VXR - ZBFW Passing SCTP

Feb 16, 2012

I have a 7204VXR NPE-400 running c7200-adventerprisek9-mz.124-24.T3.bin at the moment. This device is being used as a firewall between zones in a service provider network.

My issue is we have a lab device on the corporate side that needs to talk SCTP to the core device. Since there is no option to match SCTP in ACLs or protocol matching, I can't really get this to pass properly. What is the new IOS versions support SCTP? Any options to pass this traffic through the firewall?

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Cisco Firewall :: 2921 - ZBFW Not Blocking Traffic From DMZ

Apr 22, 2013

OK, I have a 2921 on 15.3-2T. ZBFW is working from the inside to the outside, but the DMZ is not being blocked at all to the inside. I am currently running with subinterfaces. All interfaces have zones attached. I have policies from inside to outside and DMZ to outside, those work fine. Without any policy from DMZ to inside, it can pass traffic freely from DMZ to inside. I have tried making an explicit policy to drop all to inside, still passes. I ended up just having to put an ACL on the interface
 
I already tried upgrading the IOS, that is how I ended up on the newest version. This is connected to a 2960S with a trunk port. Everything else works perfectly except for the DMZ security. I haven't had time to try to lab it up yet, but wanted to see if any reasons this shouldn't work, as all documentation says it should drop all traffic unless you make a policy to pass traffic.

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Cisco Firewall :: Port Forwarding (ZBFW) On 881W?

Dec 27, 2011

I need to update my Cisco 881W config to allow port forwarding FROM the Internet TO the following inside device as follows:
 
IP Address:  192.168.1.254
Protocol:  TCP/UDP
Port: 5001

This device is a Slingbox Pro-HD and I want to be able to view it from the Internet.
 
Attached is a copy of my 881W config.  I am horrible at properly configuring my zone based firewall (ZBFW) config

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Cisco WAN :: HWIC-1FE And Ios Version Compatibility On 2811?

Sep 7, 2009

I would like to ask if a cisco 2811 running on an ios c2800nm-adventerprisek9-mz.124-25a.bin should be able to make an HWIC-1FE card work? I am also not detecting the card on any show commands. Plus i am seeing that all the LEDs (FDX/COL,100 and LINK/ACT) are lit steadily even though there is no cable attached to it, is it safe to say that the card could be defective?

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Cisco Firewall :: 2901 / ZBFW - DMZ-Zone To In-Zone Access

Jun 9, 2012

I have a Cisco 2901 which terminates a Class C address pool. I have split the Class C address pool into 3 sub-nets and 2 zones and created a non-addressable pool (private pool):
 
dmz-zone : x.x.x.0 TO x.x.x.127 (x.x.x.0/25)
in-zone: x.x.x.128 TO x.x.x.159 (x.x.x.128/27) & x.x.x.160 TO x.x.x.191 (x.x.x.160/27)
private-zone: 192.168.x.0 TO 192.168.x.255 (192.168.x.0/24)
 
I have configured private-zone NAT to use address pool x.x.x.161 TO x.x.x.189 within the in-zone.
 
Within the:
 
dmz-zone - are servers for : DNS, Syslog, SIP & HTTP/HTTPS in-zone - is a SMTP mail server which is behind VPN Gateway/NAT, TomCat (Application Server) and PostgreSQL Server private-zone - is where all standard users are operating from and they can access the SIP & HTTP/HTTPS servers within dmz-zone My problem is that I cannot seem to configure the ZBFW to allow the dmz-zone HTTP/HTTP server to redirect to in-zone TomCat server.
 
I do not want to make the TomCat server generally visible and am instead using the Apache proxy/ajp13 to connect from dmz-zone server to in-zone server.However I cannot seem to get anything (including icmp) to work from dmz-zone to in-zone.
 
I have Policy:

POLICY-DMZ-IN (dmz-zone to in-zone) which has:
any any udp/tcp inspect
any any icmp inspect
unmatched traffic DROP/LOG
 
But I still cannot get anything from dmz-zone to in-zone...Could the POLICY-DMZ-IN be being overridden by other dmz-zone to out-zone policies?

NOTE: I have routing rules for each of various sub-nets and all out-zone to dmz-zone, out-zone to in-zone and private-zone to out-zone, in-zone and dmz-zone routing works ok, so it appears problem is with ZBFW not routing table.

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Cisco Switching/Routing :: Upgrading IOS On 2811 From Version 12.2.X To 15

Apr 25, 2012

I purchased several Cisco 2811 with Advanced IP Services - they are version 12.2.X
 
The product number looked like this
CISCO2811-HSEC/K9    2811 Bundle w/AIM-VPN/SSL-2,Adv IP Serv,10 SSL lic,128F/512D
 
I need to upgrade the IOS to version 15.1 - Do I require a license ? What happens if I install it without a License ? Am I entitled to a free license as I am not changing the software type (ADV IP Serv) ?

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Cisco Switching/Routing :: Router Upgrade 2811 To Latest Version

Aug 22, 2012

I upgraded a 2811 router to the latest version and apparently everything went smooth.   I reloaded and did a sh ver the IOS show the correct version, but the boot strap shows the old IOS.  How can I change the boot strap to show the new IOS.

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Apr 3, 2012

provide me with the important links which can show me how to do the software upgrade for my ASA 5520 ver 7.0(1) to ver 8.4 ? as well as the ASDM

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May 10, 2011

i am using Cisco ASA 5510  with ASA Version 8.0(4) and memory 256MB. me to Upgrade it to 8.3

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Cisco :: Getting Messages In ZBFW Logs On Test Router?

Apr 2, 2013

I'm getting below msgs in my ZBFW logs on my test router. .Apr 2 23:09:43: %FW-6-DROP_PKT: Dropping icmp session 115.186.192.153:0 10.40.2.100:0 on zone-pair ZP-OUTSIDE-INSIDE class class-default due to DROP action found in policy-map with ip ident 0

The bit I'm curious about is that I am NOT NAT-ting any ICMP. Hence why is the ZBFW even triggering against the LAN IP? It should only activate after NAT according to order of operations (and hence why unlike CBAC you put the inside local IP not the outside global IP).....

If the ICMP was directed at the WAN interface (not the 10.40.2.100 internal IP) then it is allowed, but morever even if blocked it should be logged against my WAN IP (which is publicly routable not a 10.x internal).

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Sep 14, 2009

McAffee scan of acs 1113 appliance running the 4.2 build 124 patch 12 version reports that a medium vulnerability exists because the system has SSH version 1.  Any way to specify only version 2 or turn off SSH?

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Mar 5, 2013

I am currently migrating a netscreen firewall to a asa 5515 version 8.6 The issue is setting up the management connectivity.
 
basically the management IP of the cisco asa is not advertised. But, we want to route a management IP through the management interface to interface Gi0/2.
 
so IP of management interface is say - 216.10.100.10. and the IP of the inside interface is say - 198.1.1.10/24 on our router we have a static route sending 198.1.1.0/24 to next hop of 216.10.100.10 (management interface of cisco asa).
 
On the Cisco ASA can I send the traffic to the inside interface and manage the firewall via ssh that way?

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Cisco Firewall :: 5510 - Transparent Firewall Installation Using ASA Version 8.4(3)9

May 14, 2012

I'm trying to install an ASA 5510 transparent firewall using ASA version 8.4(3)9 but I don't understand how traffic will ever pass through my firewall if both interfaces are on the same sub net(V lan) as the host and it's default gateway? The reason I'm doing this is were installing UAG (or Direct Access) and the UAG appliance need to have public IP's but still be behind a firewall (see attached diagram).
 
Looking at the documentation (which all seems to be for 5505's running 8.2) it almost seems like i need to have the transparent firewall 'in-line' to the ISP router?, but this router services another IP address range on another v lan for other (routed) firewalls (not shown on diagram) so putting it 'in-line' is not possible. Surely this can't be the case can it? If not how is it supposed to be cabled up and configured so packets go through the firewall?

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Cisco Firewall :: ASA 5540 - Version Change In Firewall?

Mar 15, 2012

How are asa5540 in high availability mode upgraded for their versions.

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Cisco Firewall :: ASA Version 9.0(1) / Configuring NAT On Intranet Firewall?

Dec 26, 2012

configuring NAT on intranet firewall. here is the my topology:
 
  DMZ Network  - - - - - - - - - External Firewall   - - - - - - - - - Internet
                                                          |
                                                          |    
                                                          |
  Internal Network  - - - - - - - - - Internal Firewall  
 
1) I can Ping the intneral host from external firewall, internet firewall and DMZ network

2) Both ASA's are running OS Version 9.0(1)

3) ACL used permit IP any any, on both (i.e inside and outside)
 
NAT configuration on Internal Firewall  (Identity NAT)
 
object network MGMT-SRV-INSIDE           subnet 10.10.10.0 255.255.255.192
object network MGMT-SRV-identity
subnet10.10.10.0 255.255.255.192
 object network MGMT-SRV-INSIDE           nat (Inside,Outside) static MGMT-SRV-identity

[code]....

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Cisco Firewall :: Block Ip Address From CLI At PIX Firewall Version 6.3(4)?

Oct 11, 2011

I would like to know  how can I block a ip address from the  CLI at the Cisco PIX Firewall Version 6.3(4)

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Cisco Firewall :: 2811 ZBF URL Filtering

Apr 18, 2012

I try to implement the url filtering feature on a cisco 2811 router and whenever i enable the parameter map patterns the router retuns (after some time)

%Unable to compile obj regex.[code] The result is that the router blocks ALL webpages without giving a block page message.

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Cisco Firewall :: ASA5510 With 2811 ISR?

May 26, 2012

I have a 2811 ISR configured to provide the following services to my network:
 
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While i know I can move most of the config unto the ASA, i know that the CME cannot be moved, hence I would like to do the setup such that users on the network still have access to CME.

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Cisco Firewall :: DMZ Setup Using 2811 Router

Aug 11, 2011

I am pretty new to the configuration of a DMZ and I have the task of setting one up.I have a Cisco 2811 Router running Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M), Version 12.4(24)T1, RELEASE SOFTWARE (fc3), 2 FE interfaces.One FE is connected to the WAN, with a loop back interface configured with the public IP for Internet access in the office.The other FE has 2 sub interfaces configured, one for data and the other for voice traffic.Users within the office are configured to use the data VLAN to access the internet through the WAN.
 
Now we are setting up some new services and we require to have DMZs setup.I want to setup 3 zones now that the different servers would reside in. How can i achieve this using the existing infrastructure I have?I have an idea to create more subinterfaces and assign them to the zones, but I am still not sure how this would play out. I have been on this for the whole day and unable to make significant progress.

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Cisco Firewall :: 6509 / 2811 - NAT At FWSM

May 17, 2011

I have attached a drawing of our network.  We have two 6509's connected to two Cisco 2811 (onsite) that the ISP owns. I am trying to get one side up and running before I worry about redundancy and so forth.  For this reason I have set all the HSRP priorities to 110 on the left 6509.  I have HSRP running between the ISP routers and V LAN 101 of the 6509's.  This works as I can ping yahoo and Google just fine from the 6509 switch.  I can't get from my laptop connected to V LAN 23 to the internet. 

It doesn't even attempt to NAT as there are no translations.  I have public address assigned by my ISP configured between the ISP routers and my 6509 on V LAN 101.  I then have the public address assigned to V LAN 100.  I configured V LAN 100 on the switch and V LAN 100 on the FWSM with the IP address in the drawing.  I have my NAT statements and route in my FWSM according to the drawing as well.  On the switch, I have a default route to X.X.12.19 which is the VIP between the ISP routers.  I can reach anything on the inside of my network, including the old network addresses from V LAN 23.  
 
1. Is it best to do NAT at the FWSM or should I do it on the MSFC connected to the ISP routers?  
2. If I have to configure NAT at the FWSM, does this requires me to extend the public network down to the FWSM? 
3. I'll take any examples you may have as I am stuck.

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Cisco VPN :: 2811 VPN Client Connection To IOS Firewall Using Certificates

Nov 2, 2011

I'm generally pretty good with VPN issues and with SSL certs, but this is my first rodeo with VPN and certificates together.  I've got a Cisco 2811 router running IOS Firewall (12.4(25)) and for a while now, I've had VPN clients connecting using PSK's and XAUTH.  In order to tighten security, we'd like to move away from PSK's with Aggressive Mode and use certificates with Main Mode.I've been trying to use the Cisco 2811 as the CA, rather than use a Microsoft server or third-party provider.  I think I'm pretty close to getting this to work, but something isn't quite right.  My VPN client software does connect to the 2811, and I get prompted for the XAUTH creds.  If I supply the right creds, I do see in my VPN log window that I've gotten assigned an IP address from the inside VPN pool, my split tunneling rules come through, but the VPN disconnects almost immediately and I never get a chance to try any pings or to send any other types of traffic. [code]

I have attached a sterilized copy of the 2811's current config (2811_sterile.txt), a copy of the 2811's debug output when the VPN client tries to connect (vpn_client_connect_sterile.txt), and a copy of the VPN client's log with IKE on High and Certificates on High (vpn_log_sterile.txt).FWIW, the 2811 is NOT behind NAT, but my VPN client IS behind NAT.  However, I have tried using a direct connection with the VPN client and it didn't seem to change much so I'm not convinced this is a NAT issue.Again, I've never used a Cisco router as a CA and I've been battling this problem for several hours now so the 2811's config may have a lot of unneccessary lines in it at this point.

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Cisco Firewall :: 2811 Router For 100Mb WAN Link?

Nov 29, 2011

I'm looking into upgrading my WAN link to 100Mb via Fast Ethernet link. I'm waiting to hear from ISP about what exact technology they use, but according to my manager they will be coming in over fiber and then terminate to copper. I currently have 2811 in production with two T1 cards bundled together. 2811 has basic configuration with only 2 ACLs. I have ASA 5510 for NAT, Ipsec and other services. What router or networking device (layer 3 switch, such as 3560G perhaps??) should I use to accomodate 100Mb link? It seems that 2811 will not handle that kind of bandwith..In short the max recommended bandwidth limits for the 28xx series are as follows:
 
2801--2 Mbps
2811-4 Mbps
2821-8 Mbps
2851-12 Mbps
 
I don't want to create a bottleneck and am looking for appropiate solution to accomodate 100Mb link. Also, could ASA 5510 become a bottleneck in my scenario?According to Cisco docs ASA5510 can handle 300Mbps of firewall througput, but I'm not sure how it'd work in production...

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Cisco Firewall :: 2811 Not Allowing ICMP To PBX Through Same Interface

May 31, 2013

Attached is our network diagram showing the details of our remote office and the corporate side which are connected via private fiber. The workstation (10.10.102.84) can ping the 10.20.0.31 IP address of the PBX but not the .30 address and I know if we can’t ping it we can’t remotely manage it. The 2811 router, ASA 5510 and the 6509-E can ping both IP addresses on the PBX. The ASA logs the error "Denied ICMP type=0, from laddr 10.20.0.30 on interface inside to 10.10.102.84: no matching session" when the workstation pings the .30 address.
 
We changed the default gateway of the PBX from 10.20.0.2 to 10.20.0.1 (2811 router) and we were able to ping both IP addresses from the workstation but the SIP trunks from the Internet stopped working (they NAT to the .30 address). Because calls may be forwarded from the PBX to the corporate network (via IP phones) we will eventually need to change the default gateway to10.20.0.1 and still need the Internet SIP trunks.
 
My two questions are, how do we resolve the issue of pinging the .30 address from the workstation and then when the time comes how do we resolve the issue with the SIP traffic reaching the .30 address when we change the default GW of the PBX to the 10.20.0.1 address of the 2811 router.

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Cisco Firewall :: 2811 - Limitations To ACL List Length

Sep 20, 2011

I came across this site. I wanted to produce a better incoming ACL at  home and work to prevent known bad sites
 
Here is their list of the Top 10 Global Spammers is out. The biggest  surprise on the list is Korea, as it takes over the number one global  spammer spot from China. With the improved high speed internet  infrastructure in Korea and ease of network access, who knew Korea would  be on the rise.
 
Here is the complete Global Spanner Top Ten List for the first quarter
 
[URL]
 
Korea
China
India
Russia
Turkey
Viet Nam
Ukraine
Brazil
Venezuela
Pakistan
 
When I sort the list, it is over 16k lines of ACL!
 
My question relates to what performance limits I would find.
Can I actually put that many lines in an ACL?
Will the router choke and do any other work
 
I have attached the sorted ACL list for you to review
 
Any of the following router lines will accept a  list that large and still run acceptably?
 
2811
2911  
3925
2945

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Jan 7, 2012

I have a Cisco 2811 running Advance Enterprise v 15.1-2.  I've just configured it using ccp for internet access (on 2 lines) and a firewall.  The configuration is pretty much all default and I used the ccp wizard to create a 'medium-secure' firewall. I have 2 blocks of public IP addresses for my internal network and for the DMZ.  The 2800 is configured as follows:
 
- 2 x default routes. one to each dialer.

- 6 zone pairs as follows:
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  - ccp-zp-in-out (works fine, both interfaces seem to be in use)
  - ccp-zp-in-dmz
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    - which inspects ccp-dmz-traffic
    - which matches group dmz_traffic and has a class map dmz-traffic

- cnc-zp-dmz-out which is set to ccp-inspect. (my own zone pair to allow systems in the DMZ zone to see the internet.  This works fine.)

- ccp-zp-out-dmz (works fine.  I can see my web server from any system outside my own network)

 - ccp-zp-out-self (which, I guess allows anything permitted to get to the 2811)
 
Internet works from within the DMZ and in-zone.  The outside can access my dmz servers.  The inside can access most things on the outside using the firewall rules.
 
1) Although I have the zones set up to allow the same access from in->dmz as I do from out->dmz and out->dmz seems to work, I cannot seem to access anything in the dmz from the inside.
 
2) When setting up the firewall I ticked the box for 'allow PPTP clients to make connections from the inside' (or something like that).  I cannot seem to make a PPTP connection from my workstation.
 
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Jan 12, 2013

I would like to know whether CSM 4.3 is compatible with ASA version 9.1(1). Any appropriate url that contains information about these two version's compatibility?

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Jun 17, 2012

I try to convert a CISCO ASA 8.2 version to 8.4 BUT, I have a small or "little" problem :On Cisco ASA 8.2.x, i have a possibility to create multi-line global with different subnet.Example :
 
global (outside) 2 217.1.x.65-217.x.x.66 netmask 255.255.255.240
global (outside) 1 interface     <--  Ip interface is other subnet : 217.3.x.3
global (outside) 2 217.1.x.67 netmask 255.255.255.240
nat (inside) 1 0.0.0.0 0.0.0.0
nat (dmz2) 2 192.168.4.0 255.255.255.0
 
What is the method or solution to translate multi-global in 8.4 ? with static translation in 8.4 : i try to use different server in inside's zone, but not in same network on outside. In 8.2 Firmware, it's very easy to use that, but in 8.3-8.4 version, i don't have some idea to manipulate ...
 
interface Vlan1
description Lien vers reseau Interne Client
nameif inside
security-level 100
ip address 192.168.0.1 255.255.255.0

[code]....

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Cisco Firewall :: 5520 Can Get An 8.6 Version

Apr 8, 2012

We want to make an upgrade of one of our customers' ASA 5520 (with failover). They have version 8.2 now and we want to get the more stable newest one. Can we get an 8.6 version? or we need an ASA 5500X for that one?

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Cisco Firewall :: ASA Error In Version 7.0(7)

Sep 12, 2012

%ASA-3-305005: No translation group found for tcp src inside:211.155.169.186/1433 dst outside:42.121.87.89/6000,  I found this error ,but the IP 211.155.169.186 is public address. I check the configuration but didn't find any information about this address.I don't understand why src is inside? How can I solve this error?

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Cisco Firewall :: LAN To LAN Between ASA5520 Version 8.3 And PIX?

Apr 19, 2011

We have 2 firewalls on PIX facing the Internet and connected to interface e1 (behind it) an ASA version 8.3 Both the PIX (Firewall facing) and the ASA are on the same subnet.
 
By using Routing statements and statics I have been able to reroute specific traffic to the ASA5520 version 8.3 Now I need to inverse the 2 devices. The ASA5520 will be facing the Internet and the PIX will be behind it.Unfortunately the ASA5520 is refusing to route the traffic to the PIX. The access-lists are open accordingly and a NAT on the ASA has been created.

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Cisco Firewall :: What New Command Is For NAT In Version 8.3

May 29, 2013

what the new command is for NAT in version 8.3?The config i have is from Version 7.2 and doesnt work on 8.3. [code]

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