Cisco Firewall :: Configuring NAT Port Forwarding Failover On ASA 5550
Mar 26, 2011
I've two Cisco ASA 5550 firewall. I'm don't have much knowlege on configuring this kind of firewall. I need configuring these firewall for simple NAT. I have 3 public IP address. I would like to allow server's inside of the firewall to be able to connect to internet using private address. A basic NAT. Also need to configure some port forwarding. We've bought two firewall for the Active/Active failover support. How can i configure this through ASDM? My ASDM version is 5.2.
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Nov 27, 2012
I am setting up an ASA 5550 8.4 and asdm 6.4. Last thing I am missing is to get the static nat rule done for https. Done it with asdm and cli and always end up with "error: nat unable to reserve the port". Looked around the Net so far and changed the http enable port to 4433. ASDM access is only configured for inside and mgmt port. Disabled under RA VPN all checkboxes in clientless ssl and any connection profiles since IKEv1 is used for vpn access.
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Nov 11, 2012
I discover an issue with my CISCO ASA 5550 because I'm looking at the vlans that I have configured and some vlans on the Stand by device had not an IP address configured, checking the configuration of the failover
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Dec 19, 2010
I am having a curious problem with two Cisco ASA 5550. They are configured in Active/Standby failover and in routed mode.The problem is: I cannot connect via SSH to the ACTIVE unit, only to the STANDBY. If a switchover is forced the problem is still the same. because it happens both with the primary and the secondary unit.It is not a L2 or a transport problem, because I can ping or access both units via ASDM.
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May 22, 2011
According to Cisco, one of the ASAs must have an Unrestricted License [URL]:
"On the PIX/ASA Security appliance platform, at least one of the units must have an unrestricted (UR) license. The other unit can have a Failover Only Active-Active (FO_AA) license, or another UR license. Units with a Restricted license cannot be used for failover, and two units with FO_AA licenses cannot be used together as a failover pair."I am unfamiliar with the different ASA licenses, so with my current license, I am unable to enable failover on my two ASAs. Here is a snippet of the "show version" output on one of my ASAs (they are the same as far as licenses go):
Licensed features for this platform:Maximum Physical Interfaces : UnlimitedMaximum VLANs : 250Inside Hosts : UnlimitedFailover : Active/ActiveVPN-DES : EnabledVPN-3DES-AES : EnabledSecurity Contexts : 5GTP/GPRS : DisabledSSL VPN Peers : 10Total VPN Peers : 5000Shared License : DisabledAnyConnect for Mobile : DisabledAnyConnect for Cisco VPN Phone : DisabledAnyConnect Essentials : DisabledAdvanced Endpoint Assessment : DisabledUC Phone Proxy Sessions : 2Total UC Proxy Sessions : 2Botnet Traffic Filter : Disabled
This platform has an ASA 5550 VPN Premium license.
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Jun 8, 2011
I am trying think of a better way to provide redundancy on some internally protected networks. We maintain our own WAN/backbone between our primary site and backup site. Is it possible to have two Cisco ASA 5550s in setup for failover at completely different sites as long the networks connected are available?
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Jun 28, 2011
Since the "zero-downtime upgrade" is not supported, I would like to validate the process I put together for upgrading a failover pair of asa5550 with the characteristics below. Specifically I am concerned with the role of the standby during the upgrade. This is my setup:
.- single context mode
.- active/standby
.- current firmware asa821-k8.bin / asdm-621.bin
.- role: firewall and VPN concentrator for segmented server farm network. Dynamic/static/exemption NAT heavily used.
My target is asa842-k8.bin / asdm-645.bin and I am doing a two step upgrade (8.2(1) -> 8.3(1) -> 8.4(2)) to avoid the "unidirectional" attribute and CSCtf89372 bug issues. This is a short version of what I have in mind:
.- Verify stability of failover pair and make adequate backups before beginning.
.- plug into the console of active, ssh into active and standby.
.- vpn/act(config)# no failover ( disable failover from active )
[Code]....
After reboot, point to 8.4(2) and reload again. Same concern regarding the standby unit.
I understand there might be configuration tweaks needed to the NAT configuration. After second reboot test connectivity and if successful, on active "failover", "write standby" and "failover reload-standby". Otherwise "downgrade" and back to the drawing board.
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Nov 29, 2011
I am currently doing some research (for my employer) into creating multi-context sub-interfaces on a Transparent ASA 5550.
I have not been able to find any details on this subject which state it is or it is not possible. This will be used for Syslog logging.
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Dec 6, 2012
I have a DVR machine that I've been trying to carry out port forwarding to view cameras from outside the network. It lies on 192.168.1.31. The confusing thing is the ports. The configuration on the DVR lists a device port: 8000 and a http port: 80. I am torn between which port to forward.
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Apr 19, 2013
I have a Cisco home rack lab which is behind my ASA 5505. I use my ASA to connect to the internet. My situation is I travel a lot for work, and I am unable to do my labbing practice. I am pretty new to ASA and would like to do a port forwarding to access my access server which is connected to my Cisco routers and switches.My network topology is this: (internet)-------(ASA 5505)----------(3550)-------(CM32 Access Server)----------(Cisco Rack) This is how I setup my remote access:
Code:
ssh 0.0.0.0 0.0.0.0 outside
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Mar 2, 2013
I have a problem configuring port forwarding to 443 and having client VPN to work.When 443 is NOT forwarded, VPN just runs fine (QuickVPN).As soon as I enable 443, the VPN stops working. No client can connect.I have the latest 1.2.0.9 firmware.Is there a way to enable 443 and having VPN to work at the same time ? I need 443 for Exchange.
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Jul 11, 2012
Is it posible to config port forwarding on cisco 2950 or other switchs.if such a option is there ple let me know ho to config port forwarding on cisco 2950 switch..
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Oct 16, 2012
I have two ASA 5510's that I want to setup in a Active/Standby configuration. My only question is on how to connect the inside ports to my LAN. I have 5 Catalyst 3750's stacked together that connect to the ASA's. Should I run the inside interface on ASA1 to a port on switch 1. Then run the inside interface on ASA2 to a port on switch2? And make sure both those ports are in the same VLAN? But, then when failover occured, how to I automatically make it clear the arp cache so the traffic starts flowing out of the right port?
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Sep 15, 2011
We configuring ASA 8.4.2 in Active/Standby failover mode with two cables. What would be the best design configuring etherchannel on ASAs or have one active and one standby redundant cable ?
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Mar 18, 2013
I've got a ASA 5550 firewall interface failover issue. (File attached).
when I shut down the inside interface Gi 1/1 of the left firewall(Active firewall), It failed to failover. but when I shut down the Gi 1/12 of the Core 1 switch, The firewall failover very well.
I followed this guide but I was not able to failover. [URL]
how can I configure so that when the Gi 1/1 or Gi 1/0 interface goes down, it can failover ? Code...
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Sep 28, 2011
with the 5550 we get 4 gig ports on slot 0 and 8 gig ports on slot 1, also a fast Ethernet management interface port. The documentation states that only 8 ports can be active at any one time but does that exclude this management port so that I can use this as well ?
Also is the port assignments for slot 1 like g1/0 - 1/7 ? As the other the 8 ports in slot 1 are 4 x gig E and 4 x gig sfp.
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Dec 2, 2011
So here is my network.
ASA5505--->Cisco1841--->Cat2960
Code
ASA asa831-k8.bin
Cisco 1841 c1841-adventerprisek9-mz.151-4.M2.bin
Cat 2960 c2960-lanbasek9-mz.122-55.SE1.bin
and here is my dilemma.
I can SSH from the internet to my ASA on default port 22, directly to my public IP. I can SSH from the internet to my Cisco 1841 on port 2001. I can not however, SSH to my Cat 2960. From what i can tell, on the Cat2960 i can't change the default port 22 for SSH to different port, just like i did on the Cisco 1841. I looked to see if I can change the default port for SSH on he ASA, it does not look like this is an option.
The bottom line is that i want to be able to SSH to all three devices from the internet. I only have one public IP. As of now, what i can do is only SSH to the ASA on default port 22 directly to the public IP and Cisco 1841 on port 2001. It appears that changing the default SSH port on Cat 2960 is not an option. It also appears that I can't change the default SSH port on the ASA, if i could, i would and then i should be able to SSH to the Cat 2960 on port 22. No matter what i did on the ASA, it always listens on port 22 for SSH connections.
show asp table socket
TCP 001f549f <<pub IP>>:22 0.0.0.0:* LISTEN
how do i make it listen on different port?
Here is relevent config for SSH for cisco 1841 (port forwarding)
ON ASA
object network ROUTER
host 10.10.1.1
[Code].....
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Apr 7, 2013
I am trying to open up port 32400 on my 881w Cisco router but I have not had any success I need to configure manual port-forward to enable my Plex Media server.
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Jul 30, 2012
I have an ASA5510 and I would like to implement something like this: have two ports patched in and ready but only one active, the other one in standby (when the first one goes down the other port comes up and all the traffic goes down this way), all these on one physical box. So, it's basically like port failover on the same box.
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Aug 9, 2012
I have a cisco 5520 with 8.4.4(1) and I already have a NAT for an email server on it.Here is the IP and ports on current configuration:
Email Server Private IP: 1.1.1.1
Email Server Public IP: 2.2.2.2
Email Server Local Ports : 25, 587
Right now I have ports 25 and 587 opened for 2.2.2.2 so, now I need to add a port redirection for another port:
New Port : 8925
I need to redirect 2.2.2.2:8925 to 1.1.1.1:587
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Apr 11, 2013
i'm having a problem portforwarding/redirection for the pix 501?I'm trying to open the ports 49003 and 40085 in order to view our dvr remotely and i'm not exactly sure how to it.
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Nov 5, 2012
I have an issue with portforwarding in my teleeye cctv behind asa 8.4. I can browse the DVR outside via http however when i attempt to login, "server busy" will prompt afterwards. Note: Theres no issue when acesssing the DVR locally.
Heres my config.
OUTSIDE INTERFACE:
interface Ethernet0/3
speed 100
duplex full
[Code]...
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Dec 28, 2011
I have a pair of ASA 5510s configured in active/standby mode. I have already configured the fail over settings on the firewalls. Both firewalls are connected to a 2960G. I made a change to the interfaces on the 2960 to allow 2 mac addresses on each port. [code]
Upon testing failover via the failover active command, I get port-security errors on the outside interface for each device:%PORT_SECURITY-2- PSECURE_ VIOLATION: Security violation occurred, caused by MAC address aaaa.bbbb.cccc on port GigabitEthernet0/8. After a few minutes, the error goes away and I can then connect to each firewall. It seems that it still waits for the aging time to expire before allowing the other MAC address. Shouldn't the "maximum 2" setting allow for both mac addresses?
I'd rather not have to hardcode the firewall's MAC addresses on each switchport because I could see this causing problems for us down the road. Is there anything else that can be done?
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May 2, 2011
i have a asa with a outside IP address of 140.32.121.5. behind this firewall i have a cisco MWR 2941 that i would like to connect to via telnet. its inside ip address is 10.10.10.2. my reasoning for this is because i cannot SSH or telnet from a ASA so i need to have the ASA push my telnet request to the router on its inside interface.i have tried some NAT examples but i am very green with NAT. i have also built access lists that look like the follow " access-list 101 permit tcp any 10.10.50.2 eq 23. and then tied the access-group 101 with the outside interface. this also with no success.
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Oct 30, 2012
I need to open port range 554 - 558 to a DVR on the internal network. Also, I need to NAT one of my public IP's to the DVR. How is this accomplished in 8.4? I was able to do it in an older version ASA software.
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Sep 4, 2012
I've tried setting up some simple port forwarding on my ASA, where I want to forward one port on the external interface for both UDP and TCP to the same port on an internal server.
It works fine for UDP, but all TCP packets are dropped on the outside interface, even though the configuration for UDP and TCP is basically the same! This is my config:
object network MY_SERVER
host 10.10.1.4
object service TCP_MY_SERVICE
[Code].....
Port count goes up on line 2 (UDP) but never for line 1. I just see the packet denied instead. Same thing happens in the packet tracer, a packet destined for my external interface on that port for UDP is allowed and NAT'd just fine. TCP it gets dropped by the ACL on the outside interface.
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Oct 23, 2012
I have a Cisco ASA 5510 appliance running ASDM 6.3 We have a number of public IP addresses associated with our company. In order to utilise the IP addresses effectively I want to use one puplic IP address for two servers running on different ports.e.g.
Public IP address 78.109.174.100
for both
Server 1 HTTPS and HTTP
Server 2 FTP
Both Servers live in the same subnet (DMZ) I believe this maybe port forwarding but could be completely wrong. I've tried creating a NAT rule that goes from Server 2 Network object to Server 1 external but this didn't work.
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Feb 25, 2013
have a couple of ASA 5505's which work fine for what they are doing VPN and all that - we have 1 DLINK DFR-700 Firewall left and I need to get a new ASA to replace this since it is old.All this box really does is port forward external clients to 1 address on the internal lan for client software updates.So lets say we have client a with IP 1.1.1.1 and client b has 2.2.2.2 - at the moment this is what happens client a and b come in through http and get mapped to the internal http server 10.10.1.2So I need to setup about 100 clients which can come in through http only - get mapped to the internal IP and also keeping the internal server to be able to access anything outside.
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Dec 6, 2012
I have ASA5505 and am having issue with port forwarding NAT . [code]
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Jun 6, 2013
I'm trying to forward an internal service on a internal server to the external interface on the same port on the outside interface of our ASA.I been searching for a solution for days and found nothing.Here are the relevant parts of my config:
: Saved
:
ASA Version 8.4(2)
!
object service TCP-WebServer-8080
service tcp source eq 8080
object network WebServer_Object_10.1.10.7
host 10.1.10.7
[code]....
So it looks like it's being dropped by an ACL, but it looks right to me.
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Dec 3, 2012
I have a ASA 5510. I want to access the internal server IP through the ASA via http://60.54.x.x:8080/sms/DnNotify ( via port 8080).How do i configure it? NAT? ACL? configure port?
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Sep 1, 2012
I have the following configuration in my ASA 5505 and I'm having problems connecting with other players on my XBox (moderate NAT).
I think my problem is that I need to forward ports tcp:3074, udp:3074, and udp:88 to my xbox which is at 192.168.2.50 (vlan 3 below).
[code]
# sh run
: Saved
:
[Code].....
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Oct 1, 2012
I am trying to forward specific ports from the outside interface on my ASA5505 to my servers inside and can not get it to work! I have a VPN that currently works and the firewall rule in place I am just overlooking something simple I'm sure. Here is the config:
ASA Version 8.2(5)
!
hostname ASA
enable password <removed>
passwd <removed>
[Code]...
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