Cisco Firewall :: Secondary IP Address In ASA5510
Feb 7, 2013
Just want to know if there is a way to configure secondary IP address on the outside/public interface of ASA/PIX.One of our clients have used most of their IP on the subnet given by their ISP. They use those IP's for staticallymapping to Servers inside their local LAN. Thus, they requested another block/subnet from their ISP. They will also use this for static mapping/port forwarding to other servers in their network. The current UTM they are using is allowing this but they would like to use ASA/PIX as their main Firewall. Is this even possible or is there a workaround for this kind of scenario?
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Jun 29, 2011
I have two ASA5510's set up in failover, and the secondary keeps crashing after doing the interface checks when bringing failover up. This only happens if I try to upgrade the image on the secondary to anything newer than 8.4.1 (I've tried with 8.4.1-11 and 8.4.2). The primary one run just fine with new images.
I don't have the exact error right now, as I need to do a screen capture from console. It's just a huge crash dump.Are there anything I might have missed during the upgrade? Should I cold-boot both the firewalls in the correct order?
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May 4, 2012
I have a cisco asa 5510 with security plus license in Live enviroment . I need to add a secondary firewall . I was planning to do in active /standby mode for failover .But i have a doubt , when i do "show version " on live asa output says Active /active failover , does this means that i can only configure failover in active/active mode not in active/standby (which i want to do )?
Maximum Physical Interfaces : 8
VLANs : 20, DMZ Unrestricted
Inside Hosts : Unlimited
Failover : Active/Active
VPN-DES : Enabled
VPN-3DES-AES : Enabled
VPN Peers : 25
WebVPN Peers : 2
Dual ISPs : Enabled
VLAN Trunk Ports : 8
AnyConnect for Mobile : Disabled
AnyConnect for Linksys phone : Disabled
Advanced Endpoint Assessment : Disabled
UC Proxy Sessions : 2
This platform has an ASA 5505 Security Plus license...
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Oct 14, 2012
I just purchased an ASA 5555 and started to configure. I was successful in natting all the IPs that are on the same subnet as the ASA eth0. I could not get the nat working for the 2nd address block.
Ex:
interface GigabitEthernet0/0
nameif outside
security-level 0
ip address 192.168.1.33 255.255.255.224
[Code]....
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Sep 27, 2011
My customer has a 5510 with the inside interface connected to a routed port on a Cat3560G.When I look at the arp cache on the 5510 all inside IPs have the MAC of the 3560's routed port. [code]
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Mar 25, 2011
I am configuring ASA 5510.
My ISP given /28 pool of public IP's. So i had total 14 available IP addresses.
I configured one IP to the my firewall outside interface. I want assign remaining IP's to the my Servers, which are located inside to the firewall.
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Jun 23, 2011
Recently, I've been having significant problems with denial of service on our ASA-5510. Two IP addresses in particular attack my ASA regularly. What kind of rule do I need to create to deny these IP's access to my firewall?
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Mar 10, 2011
we have two Cisco ASA 5510 in failover configuration.We tried to change the public IP address on the Outside interface of the primary device but it didn't works. The new IP is not reachable from Internet nor pingable from device on the same LAN.The new IP address is in the same subnet of the old IP.
From the switch on which the ASA is connected and from another Cisco PIX we can see the ARP entry. In the analysis, on the old public IP address there was a VPN site-to-site and Webvpn defined.We tried also to shut/no shut the interface and reboot the device.
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Aug 23, 2012
The old syntax that I am much more familiar with has been deprecated. On older IOS it would have been something like static (inside,outside) tcp 209.114.146.122 14033 192.168.30.69 1433 netmask 255.255.255.255 Plus an extended ACL to allow the traffic.I am trying to create a Static PAT to allow a host address to access our Network through an ASA. I have external address 209.114.146.122 that I want to hit the external interface on an obscure port (say 14033) and translate that traffic to an internal host address on port 1433.
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Mar 16, 2012
On a cisco 2821 running 15.1(3)T1 From this cisco DOC, common use of secondary IP addresses on an interface are
•There might not be enough host addresses for a particular network segment. For example, suppose your subnetting allows up to 254 hosts per logical subnet, but on one physical subnet you must have 300 host addresses. Using secondary IP addresses on the routers or access servers allows you to have two logical subnets using one physical subnet.
•Many older networks were built using Level 2 bridges, and were not subnetted. The judicious use of secondary addresses can aid in the transition to a subnetted, router-based network. Routers on an older, bridged segment can easily be made aware that many subnets are on that segment.
•Two subnets of a single network might otherwise be separated by another network. You can create a single network from subnets that are physically separated by another network by using a secondary address. In these instances, the first network is extended, or layered on top of the second network. Note that a subnet cannot appear on more than one active interface of the router at a time.
On the WAN interface I've added two Secondary Public IP's (from the same subnet) to use for NAT to internal hosts. Is this a common scenario or is there a more typical way to acheive this. This assumes, I do not want to put a Public IP on an interface on the internal server.
interface GigabitEthernet0/1
description WAN$ETH-WAN$
ip address x.x.x.1 255.255.255.240
ip address x.x.x.2 255.255.255.240 secondary
ip address x.x.x.3 255.255.255.240 secondary
[code]....
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Oct 3, 2011
Is it possible to setup a Backup GRE Tunnel using a Seconadary IP Address on the WAN interface. The router is a Cisco 871.
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Mar 23, 2012
I've got an 1811 router running 15.4 IOS and a cable modem with 5 static IP's attached to Fa0. I would like to dedicate one of those IP's to a dedicated internal subnet (10.0.30.0/24) but I am not sure how to accomplish this?
What would be the best method to accomplish this? Unsure of where to begin..
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Feb 21, 2013
I have a few old 2600 routers (2621, different IOS's) which I'm now replacing for new one's from the 2900 series (2901, Version 15.1(4)M4).In my configuration I have two IP addresses in my LAN interface and I have HSRP configured within the secondary IP subnet range. It would be something like this:
interface GigabitEthernet0/1
ip address 172.x.x.x x.x.x.x secondary
ip address 10.z.z.z z.z.z.z
[Code].....
Now, in the new 2900 routers, my interface configuration hasn't changed however I can see that the hello packets are now sent with the source within the respective HSRP IP subnet so I had to edit my acl for that:
permit udp 172.x.x.x x.x.x.x host 224.0.0.2 eq 1985
Is there a way I can force the HSRP to work as it previously did in the old IOS's?
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May 11, 2012
I have recently configured secondary ip address on LAN Interface of Cisco C6509.. We have some application which needs to use broadcast traffic communication to communicate with client... Broadcast is working within subnet & also working from broadcast server to primary subnet. But not working from secondary subnet.. I have checked broadcast within secondary IP range & it's working fine... Secondary not working broadcast with primary and also with broadcast server... broadcast address is different for these subnet but both should be communicate since configured on same interface... When I went through Cisco website found that command "ip directed broadcast" which will pass broadcast to different subnet... But I'm not sure whether any other impact if I enable that command on particular Ethernet interface...
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Jul 15, 2012
I have just updated a VLAN interface on my router. I have two 6500's with GLBP configured. The particular interface had a primary and secondary IP address. I shutdown the interface on one router and deleted the secondary address then assigned the orignal secondary address to be the be the only address associated with the interface and enabled the interface and it came right back up...all looks good. I proceeded to do the same thing to the other router and once again all looked good. Now, I am able to PING the devices in the subnet from router, but am unable to ping them from any place else. [code]
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Apr 17, 2011
I am having two ASA 5550 firewall running in active/standby mode. With in last two months our secondary firewall got down automatically 3 times. Firewall is running with IOS version 7.1.2. how to proceed further troubleshooting because there are not any logs on firewall.
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Jun 6, 2012
ASA 5510 have two model Bun-K9 and Sec-Bun-K9 from the datasheet find out difference Port related and Redundancy. My questions is : Have any major difference for Security service between two model ?
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Jun 13, 2012
I would like to know if is possible to configure a secondary IP address in a 5505 interface ??
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Aug 27, 2012
We are in the process of implementing secondary ISP to our ASA firewall and We would like to run both ISPs in parallel so we can test until we finally cutover?
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May 15, 2011
Can we assign Secondary ISP-2 Pool IP to DMZ Server, network design attached for reference.
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Mar 3, 2013
I have two ASA 5520s in Active/Standby. I try and test this quartely to ensure it is working correctly. Everything works fine, except I have an issue with one interface. When doing a show failover, it shows the interface as failed on the secondary unit, and I am not sure why. It shows it as normal on the primary.
This host: Primary - Active
Active time: 9277305 (sec)
slot 0: ASA5520 hw/sw rev (2.0/8.2(4)) status (Up Sys)
Interface WaterworksCanopy (192.x.x.x): Normal
[code]....
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Dec 5, 2011
We have 2 ASA 5505s in a data center at a remote site.
Whilst troubleshooting another issue I noticed the below. I don't know much about fail over but this would suggest that the secondary ASA is active and the primary ASA is on standby.
if the primary is "active" then how come the secondary is the active ASA? I would have thought that once the primary ASA became active this would assume the "main" role".
[Code] .....
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Nov 24, 2012
We already have a subnet defined to inside interface and is in produciton. the default gateway is this interface ip. In that setup now I have to add one more subnet and as the first subnet is been defined in ASA indside interface, I have to assign secondary Ip to the inside interface so that new subnet users can easily reach here and go outside.
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Jan 15, 2012
Cisco ASA 5505 Cannot Ping Secondary Internal Network.
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Aug 17, 2011
As this is an ASA 5505, unlimited users, I must use arp alias to allow a secondary network.
Inside network: 10.200.31.0/24.Additional inside network: 10.200.12.0/24
Clients in both networks can reach internet, but they can't communicate with eachother. Hosts on the additional network can ping the ASA inside network IP, but nothing else. I get incomming hitcount for inside interface when 10.200.12.x tries to ping 10.200.31.x. In the error log, I see: [code]
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Nov 20, 2011
I have a single production 5510 with 2 contexts. Now I want to integrate the secondary failover unit. My question is: How much configuration needs to be done on the secondary firewall? How much of the configuration will be sync'd from the primary to the secondary when the secondary is connected?
For example, do I need to add the following on the secondary or will it be sync'd from the primary?
admin-context NAME
context NAME
allocate-interface Ethernet0/0.14
[Code].....
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May 17, 2012
Recently I've installed this particular cisco ASA5510 at a client site (Head office), along with remote access VPN setup. All most 32 branches(one user from each branch) connect to the head office via remote access vpn.
Further I've used the "vpn-framed-ip-address" command along with a dedicated ip address, under each "user attributes", so every time when a user connect, he used to get the same ip address from the VPN pool.
My problem is sometimes this setup works fine, but once in a while the same ip address will be assigned to two different users at the same time, despite of the "vpn-framed-ip-address".
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May 23, 2013
i never see this before, but on newly purchased just configured firewall.when i do wrtie standby.All interfaces on standby unit flaps.is it some IOS bug? my firewalls are [code] what could be the reason? FYI i am using LAN base failover and not doing any statful fail-over.
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Nov 8, 2012
I have a working DMVPN solution. I am trying to stand up a secondary DMVPN hub at our disaster recovery site. We are trying to deply to a Dual HUB SIngle DMVPN solution. The HUB2 DMVPN router has an INSIDE trusted interface and has an OUTSIDE UNTRUSTED interface.
The inside is 10.248.11.X...the Untrust/public is 192.168.93.11 which is connected to our DMZ 3 on the ASA 5520.....then I am trying to NAT the 192.168.93.11 to an outside public IP 199.248.30.X....just not working...have had 2 tickets open with Cisco this week and they still are unable to resolve. I am sure it is the ASA5520 is not configured correctly.
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Apr 10, 2012
i just received a RMA for failed ASA 5520 that was acting as secondary unit in multicontext configuration. What would be correct procedure to install it back in production? Do i need to restore backed up config of the fallen unit or is it just enough to enable multimode and connect to existing (primary) unit? Any good link for documentation that deal with this issues.
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Dec 5, 2011
We have two ASA5510's, running IOS ver. 8.2(4). We setup Load Balancing on two ASA's. Will there be any problems if we change the IP address of the outside interface on one of the ASA's?
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Feb 12, 2013
I have 4 public IPs on Router 3845 interface FastEthernet 0/0/1. IP as below.
50.200.2.2
50.200.2.3 secondary
50.200.2.4 secondary
50.200.2.5 secondary
I wan to allow ports 80 to 90 on 50.200.2.3 for my webserver (192.168.10.50)
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Aug 25, 2011
Cisco ASA 5505 Security Plus 1 link with PPOE dialup for internet access
desirable situation: Primary link with a PPOE dialup Secondary Link with DHCP address Asignment
Problem: i want to configure Dual ISP Failover modus, but the problem exist when i configure the ip sla syntax it looks good in the running config. but after a reload the secondary line becomes primary
It looks like the ppoe client authentication is busy when the ip sla tracking mechanism becomes active. can i tweak the settings that the ip sla tracking mechanism starts later?
What i the correct config for Dual ISP setup with primary PPOE and secondary DHCP
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