Cisco Firewall :: ASA 8.2 Multiple Nat Statements
Jun 12, 2013
I would like to config "when host X on v lan X goes to a network that is across an ip sec tunnel, for which v lan X network is not in the encryption domains, translate host X address to that of the asa in a network that is part of the crypto domain".
Interface vlan544 (172.16.80.0/24) is the local encryption domain, and 10.1.0.0/29 holds some monitoring servers that should not be part of the encryption domain, but rather get it's source address translated to that of the firewall in 172.16.80.0/24. Here's how I did:
# Vlan522 for 10.1.0.0/29, need to somehow have a specific nat here I guess that falls between the no nat and the generic "nat the rest to the global)
[code]...
This obviously didn't work, the second (number 2) rule is never hit. What am I doing wrong?
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Oct 10, 2011
I am trying to set a logging discriminator that will drom any message contans the mnemonics etc. "ABC" and "XYZ". As fists step I configure this:logging discriminator nolog mnemonics drops ABC
but when I am trying to add a second statement.logging discriminator nolog mnemonics drops XYZ
in the same discriminator (nolog) it replaces the first statement with the last. So in the show run I have always one statement for discriminator "nolog". Finally, how can I configure a logging discriminator with more than one statement? I am using IOS Version 12.2(33)SRD4 on a Cisco 7609.
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Aug 21, 2012
The configuration for the natting is something like this [code] If I understand the config statements 10.232.50.98 is natted to 32.x.x.66 and 10.232.50.99 is natted to 32.x.x.69 , but do we need reverse natting stements as well to work this ?
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Feb 19, 2012
have 2 inside networks:
object network INSIDE_10.6
subnet 10.6.0.0 255.255.0.0
object network INSIDE_192.168
subnet 192.168.0.0 255.255.255.0
I grouped these 2 into 1 object-group:
object-group network INSIDE
network-object object INSIDE_10.6
network-object object INSIDE_192.168
Public IP address used for PAT:
object network PAT
host 152.x.x.x
I used the following statement to create Dynamic PAT to public IP address:
object network INSIDE_10.6
nat (any,any) dynamic PAT
object network INSIDE_192.168
nat (any,any) dynamic PAT
Is that correct? Also I'm using one public address to PAT both inside networks. Is there any dvantage of using 2 different ones, so each inside network would be PAT to its own address?
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Oct 3, 2012
I have a Cisco ASA running 8.2 in routed mode.The ASA has three interfaces, inside, outside and DMZ. They connect to the following three networks:
Inside: 10.1.1.0/24
Outside: 10.1.2.0/24
DMZ: 100.1.1.0/24
I have the following dynamic PAT configuration:
nat (inside) 1 10.1.1.0 255.255.255.0
global (outside) 100.1.1.1
nat control is turned off.
By my understanding any traffic from the inside to outside interface will be PATted to 100.1.1.1. However, communications between inside and the DMZ will not be PATted, and should work with no problems.This seems to be corroborated by this document: [URL]Which states:"The adaptive security appliance translates an address when a NAT rule matches the traffic. If no NAT rule matches, processing for the packet continues."EDIT: I may have misunderstood the above statement.I found this guide to configuring NAT/PAT: [URL]It states:"When you specify a group of IP address(es) in a nat command, then you must perform NAT on that group of addresses when they access any lower or same security level interface; you must apply a global command with the same NAT ID on each interface, or use a static command. NAT is not required for that group when it accesses a higher security interface because to perform NAT from outside to inside you must create a separate nat command using the outside keyword. If you do apply outside NAT, then the NAT requirements preceding come into effect for that group of addresses when they access all higher security interfaces. Traffic identified by a static command is not affected."My problem is that packet tracer does not seem to bear me out. It tells me the packet is dropped due to "no matching global" when I source traffic from the inside interface and send it to the DMZ.
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Sep 10, 2012
Is there a cisco best practice on the maximum number of NAT statements on a Cisco ASA? We have a 5520 and a coworker is adding static NAT policies so a vendor can monitor around 1,029 nodes. The problem is each node inside is a 10.X.X.X and to keep the IPs from overlapping with other customers the vendor monitors they would like us to NAT to a 172.16.X.X scheme.
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Oct 16, 2011
I have a asa 5520 with an outside and backup interface. I am trying to configure two static nat statements from the inside to the outside and backup interface. Here is what I have configured so far.
object network obj-10.1.1.254
host 10.1.1.254
object network obj-10.1.1.254
nat (inside,outside) static 172.25.10.3
I want to also use nat (inside,backup) static 172.25.10.3
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May 27, 2012
The config is from our MPLS router located in HeadOffice, ^controlled-ospf ^ whats its function^ routes_in ^ whats its functionhow to change standard acl to extended acl.
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Jan 25, 2012
As long as I have been doing this stuff, I have never had a clear understanding of all of the 6500 boot images and statements. The more I read online, the more I get confused.
1. What is the boot image "boot-mz" for? Where should it be placed (i.e. bootflash)? what command do I need to issue in order to use the boot image I want?
2. What is the IOS rommon image for? I thought the rommon image was the boot image but apparently these are two different images. Where should it be placed (i.e. bootflash, sup-bootflash, etc). What command do I use to ensure that I am using this IOS rommon image?
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Jan 29, 2012
I have a 6509 running s72033_rp-ADVIPSERVICESK9_WAN-M version 12.2(33)SXH5. Four incorrect bgp aggregate-address statements were entered in which overlap. Attempted to remove the statements but they won't come out.
aggregate address 16.37.31.0 255.255.224.0 summary-only
aggregate address 16.37.30.0 255.255.224.0 summary-only
aggregate address 16.37.29.0 255.255.224.0 summary-only
aggregate address 16.37.26.0 255.255.224.0 summary only
I have entered in the correct statements and have no problem getting those in, removing them, and reentering them.
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Feb 5, 2012
I need to create a firewalled segment that not only separates hosts from general population, but also from each other. The solitary confinement of firewalled segments.I know that I could create a bunch of sub-interfaces, one for each host or group that needs to be isolated, but I'd really rather not have to do that if possible. 1) It could become a management nightmare between ACLs and sub-interfaces and 2) it's a waste of IP addresses.s there any way that I can create a bunch of separate VLANs behind the firewall and have them all terminate at the firewall, using a single firewall IP address for the gateway?
VLAN 1 - hosts 1.1.1.5 and 1.1.1.6VLAN 2 - hosts 1.1.1.7
Firewall DMZ Interface - 1.1.1.1VLAN 3 - hosts 1.1.1.8 and 1.1.1.9
This way, the hosts are isolated and can't talk to each other unless they're on the same VLAN.I'm working with an ASA 5510 running 8.2.4(4).
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Jul 24, 2012
We are trying to utilize a 5 ip block of addresses provided by our ISP. What we have assigned from them is like this: 10.10.10.46 - 10.10.10.50 is our ip range. 10.10.10.45 is the gateway. Subnet is 255.255.255.248. If we assign 10.10.10.46 to the outside interface how do we accept inbound traffic from the other addresses?
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Jan 15, 2013
Having upgraded to 8.3 from 8.2 I and read much about the differences , it seems that 8.3 deals with NAT in a much more managed method.However I am confused on how one would NAT a network object to multiple interfaces? i.e I know you can specficy a NAT adddress within the network object howeveer this only allows you to specific a single IP address.What if I want to talk accross multiple interfaces how would I specify this?
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Oct 16, 2012
We are in the process of adding second isp for webhosting purposes .Is there any issue if we are making outside 2 interface on the pix .i need to host some websites through this new link ie isp2 .
PIX Version 7.0(7)
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Jun 16, 2011
We have an ASA 5510 firewall. There are 4 ports on it configured as 2 outside, one inside, and one DMZ. We have two cable modems attached to the outside ports. Our plan is to have the "inside" port directed to one outside port/cable modem, and the DMZ port directed to the other outside port/cable modem.
We have been able to get the "inside-to-outside" setup to work but not the "DMZ-to-outside" setup (at least at the same time).First off, is this possible? If so, what are we likely missing - some way to have a second default route for the DMZ?(My manager is the "Cisco person" here, not me, so I may not have enough info.
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Mar 26, 2013
I have an ASA5510 that is connected to outside for WAN, inside for LAN (10.22.254.0/24), and a iSCSI switch plugged into Ethernet 0/3 (10.22.244.0/24). I can ping the Eth0/3 interface (10.22.244.1) but I can't ping across that interface from WAN or LAN side.
START CONFIGURATION
ASA Version 9.1(1)
!
hostname ASA5510
[Code].....
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Jun 23, 2011
NAT command on 8.4? I am trying to PAT multipule Inside subnets to an IP address. With the example I found I can only PAT one subnet. If I do it the way I have below, it will end up with the last subnet (3.3.3.0) stay in the config. What is the best way of doing it? I have about 20 inside subnets I need to PAT.
object network obj-Inside-sub1
subnet 1.1.1.0 255.255.255.0subnet 2.2.2.0 255.255.0.0subnet 3.3.3.0 255.255.0.0nat (inside,outside) dynamic 199.246.5.2
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Aug 16, 2012
Does the pix-501 support multiple SNMP communities? Im trying to add a second one, but the original community string gets removed when I add the new one. If we can have multiple SNMP hosts, then I woud imagine you could have multiple strings. I thought it was like most switches and routers, which can have the following:
snmp-server community STRING1
snmp-server community STRING2
The Pix-501 is currently running on version 6.3(5).
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Apr 28, 2013
I have ASA 5520 with Ver 8.2.Outside interface is directly connected to ISP's router(TelePacific) and is assigned one of public IP:198.24.210.226.There are two servers inside the network with the private IP's:192.168.1.20 for DB Server, and 192.168.1.91 for Web Server.I did Static NAT 198.24.210.226 to 192.168.1.20 and 198.24.210.227 to 192.168.1.91.When I access DB Server(198.24.210.226) it's working OK but when I access Web Server(198.24.210.227) there is no response at all.I checked the inside traffic, it even did not get into the firewall.Is this the problem with ISP's router? How can we route all of our public IP's to the outside interface(198.24.210.226)?
interface GigabitEthernet0/1nameif insideip address 192.168.1.1 255.255.255.0security-level 100no shutdown
interface GigabitEthernet0/0nameif outsideip address 198.24.210.226
[Code].....
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May 24, 2011
I have an ASA 5505 that I log into and currently only need a password to log onto the device. How do I set it up so a username is required as well?Another user needs to access the device. How would I set that up so they have to user their own credentials? I tried username apssword priv command and it does not work.
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Mar 9, 2013
I have three public IP:s from /24 network like 83.x.x.10, 83.x.x.25 and 83.x.x.41 all using netmask 255.255.255.0.
I'm using 83.x.x.10 on ASA outside interface and trying to do static nat for inside servers with those other IP:s, but not yet solved it.
Using Cisco ASA 5505 software v9.02
Config:
object network obj_guest
nat (guest,outside) dynamic interface
object network obj_any
nat (inside,outside) dynamic interface
object network w2008
host 192.168.1.10
[code]....
This works other networks that are like whole network with /29 mask and have router in front of ASA using bridge. But in my case i just have DSL modem bridged in front of ASA. This static nat works like should if i use like Zywall USG series fw and this same configuration works in my customers, but they have those scenarios i said having mask /29 and router in front...
It seems that the problem is in ASA, like i won't show those public IP:s to public router from my operator. Because if i roll those other public IP:s on my ASA:s outside interface: i will use 83.x.x.25 and 83.x.x.41 on outside interface and after that put back my original 83.x.x.10 then my static nat is working just fine, atleast few hours, but not in next morning because ISP router flushes ARP cache.
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Aug 17, 2011
Looking to replace an "all-in-one" type firewall (UTM/Firewall, SSL VPN) with a cisco product - the issue i'm running into is that we have multiple ISPs plus WAN and DMZ - overall more than 5 ports on mid-range ASA devices - and from what i read, adding 4-port module precludes me from adding CSC module.
Is there an solution to that other than going for 5585-x model? (kind of over our budget, granted we need 2 for failover)
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May 14, 2013
Can we have multiple dmz's on asa 5520 or any other cisco firewall, if so how can we configure them and what would be the security-level for those and how to decide, i mean which one has highest and lowest. another question is what is the purpose of security levels, i mean security-level 100 for lan and 0 for wan and others between 100 to 0. whats the importance of numbers from 0 to 100, what do these numbers tell the firewall. I want to try ids in gns3 but i don't have the ios image, from where can i get it.
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Dec 26, 2011
We have a working config with 1 external IP, we need to a second webserver (https) and it should be routed via a second public IP address. I already tried some suggestions from the community but haven't been able to find the solutions.
xxx.xxx.xxx.194 is going to the internal IP of 192.168.60.1 for OWA (https)
xxx.xxx.xxx.195 should go to a new webserver on 192.168.60.3
both server should be connected using SSL This is the current configuration :
ASA Version 8.3(1) !hostname fwdomain-name domain.localnames!interface Vlan1nameif insidesecurity-level 100ip address 192.168.60.250 255.255.255.0 !interface Vlan2nameif outsidesecurity-level 0ip address xxx.xxx.xxx.xxx 255.255.255.0 !interface Ethernet0/0switchport access vlan 2!interface Ethernet0/1!interface Ethernet0/2!interface Ethernet0/3!interface Ethernet0/4!interface Ethernet0/5!interface Ethernet0/6!interface Ethernet0/7!ftp mode passiveclock timezone CEST 1clock summer-time CEDT recurring last Sun Mar 2:00 last Sun Oct 3:00dns server-group DefaultDNSdomain-name domain.localobject network obj_any subnet 0.0.0.0 0.0.0.0object network NETWORK_OBJ_192.168.70.0_26 subnet 192.168.70.0 255.255.255.192
[code].....
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Feb 27, 2013
I'm having a bit of trouble determining the best way to do this... I have 12 V LAN's set up (sub interfaces on a redundant group of two NICs) on my ASA 5510. On several of these, I want them to be able to access the internet but not access other V LAN's.
By default, they have a rule like "any to any less secure", and since the outside interface has a lower security level, this works great. But if I create an ACL on the interface, this rule disappears. I can restore internet access by adding an "any to any" or "(this interface's sub net) to any" rule, but this seems to imply that it allows access to any v LAN. Do I have to create a set of "deny" rules for each V LAN, on each V LAN, followed by an any-any rule to allow internet access, or is there a cleaner approach?
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Mar 9, 2012
I'm trying to get my ASA 5505 (IOS 8.4) to work, but got stuck on NAT because I would like to allow 3389 access for just a couple of WAN IP's. This is what I found so far:
(config)# object network Internal_RDS(config-network-object)# host 192.168.1.10
(config-network-object)# nat (inside,outside) static interface service tcp 3389 3389(config-network-object)# exit
(config)# access-list inbound permit tcp any object Internal_RDS eq 3389
(config)# access-group inbound in interface outside
But this will allow all WAN IPs to access 192.168.1.10 over port 3389 I guess? I would like to allow only some WAN IP's
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Oct 16, 2012
I have ASA 5520 with Version 8.2(5), the ISP give me a block of IP pubic (201.148.156.193/28), one IP valid (201.148.156.194) have the Global NAT (all users LAN) and server FTP, but i need that IP 201.148.156.195 is used for VCSe, and the IP 201.148.156.196 is used for other server FTP.
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Feb 7, 2013
i've two cisco asa5510 with 4 FastEthernet interfaces each.They are connected as below:
[code]...
to three different ISP each of them! The 4rth interface of each of them, is connected to internal LAN network. Both Firewalls, offers VPN Services to ISP connections on Fa0/0
How can i achieve high availability for this scneario?is this possible to implement some HighAvailability and to offer the actual services to each of them, in case that the other firewall fail?What about using subintefaces? can i connect bothe ISP and Customers links on one or each of them, in case that firewall01 fails, all the services to be online on firewall02?
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Sep 10, 2011
Attached is my updated ASA 5505 (8.4[2]) config. With this config, basically the "laptop" group works fine, but the leo and orion groups don't ever receive packets inbound. No DNS, nothing.
The laptop is windows, the other two are servers with two NICs. The interface cards are Intel Pro/1000s. I've been through everything including Vlan protocol conflicts and actually enabled the servers for 802.1(Q).
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May 22, 2011
I have 3 networks coming on DMZ (VPN) interface. Only one network is able to ping the DMZ interface. See below networks coming i on the DMZ.
10.132.24.0/2410.132.25.0/2410.132.26.0/24 Only the 10.132.26.0/24 netork works as it is in the same range as the DMZ interface.
allowing the other two networks to communicate. I've attched the diagram and configs for your perusal.
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Dec 23, 2011
I want to configure multiple DHCP pool on ASA. that I create like
int e0/2
no shut
interface Ethernet0/2.10vlan 10nameif inside10security-level 100ip address 192.168.10.1 255.255.255.0
interface Ethernet0/2.20vlan 20 nameif inside20 security-level 100ip address 192.168.20.1 255.255.255.0
dhcpd address 192.168.10.10-192.168.10.254 inside10dhcpd dns x.x.x.x y.y.y.y interface inside10dhcpd enable inside10
dhcpd address 192.168.20.10-192.168.20.254 inside20dhcpd dns h.h.h.h z.z.z.z interface inside20dhcpd enable inside20
I have following query...
1. int e0/2 work as trunk port, is it? any special confiduration require other than dot1Q?
2. How can I configure inside interface? is it like,
access-group inside_access_in_1 in interface inside10
access-group inside_access_in_1 in interface inside10
3. How can I configure static NAT ?
4. How can i configured inside route?
5. How can I configured default NATing?
6. On which interface I access ASA? currently using inside interface.
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Apr 27, 2011
I am looking to deploy a cloud/borderless network solution and cannot get my head around how the licenses (AnyConnect Mobile and essentials) will be applied in a multiple context deployment. Any correct documentation.
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Aug 29, 2012
There is a 6500 switch with fwsm. We have extended 2 vlans from the ISP into the FWSM. Also there are atleast 10 other vlans for our internal network. We would like say half of the internal vlans to go out of the 1st ISP vlan and the remaining half from the 2nd ISP vlan. Is there a way we can do this in the FWSM?
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