Cisco Firewall :: Global PAT With Static NAT On PIX 6.3
Jun 7, 2012
I am having issues getting this to work. For email, I have mail.xxx.xxx DNS'd to 165.165.165.165. I want it to come in to 10.1.0.31. It needs to go out a cluster of 10.1.0.31, 10.1.0.34, or 10.101.201.31 but look like it came from the 165.165.165.165 address. I have set up static NAT for the inbound. I have set up the global PAT with an ACL group of the 10.xxx addresses. I have set this same method up on an ASA with no issues but it doesn't want to work on the PIX 6.3. What am I missing?
no fixup protocol smtp 25
object-group service NewExchange tcp
port-object eq https
port-object eq smtp
[Code] ....
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Sep 26, 2011
I have ASA 5550, i create 2 context in my ASA 5550. I create a NAT in context A and context B. But when i create NAT in context B i get another i get error message like this "static overlaps with global in another context". I have checked there is same nat translation in context A and context B. My question is : is same nat translation configuration not allowed in context A and context B"
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Jun 2, 2013
I'm receiving an error when trying to access a web server behind from one subinterface to another subinterface on an ASA access the public IP. I'm getting the following:
Global Static NAT Deny IP spoof from (61.X.X.X) to 201.X.X.X on interface Outside
Traffic dies at the firewall stating that the traffic is spoofed from the Global address (61.) to the static (201.) address. Both bound to the outside interface. When I create a static NAT on the firewall there is no problem; however when I'm patting against the firewall to the public IP I get the denies.
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Nov 30, 2011
I have an ASA 5510 running version 7.0. I have a problem with an exchange server using a static map and its outbounc connectivity. It connects outbound through the global address even though inbound connectivity works fine through the static mapping. The recent changes are changing of the zero route through a different interface (there are to circuit connected to this ASA on different interfaces). So the idea was to get all workstations in the office using the global address and routing out through one circuit, and the servers connecting in/out through the other circuit. Shouldn't a static mapping ignore what the zero route is?
Here are what I believe to be the relevant configs.
interface Ethernet0/0
description New 6mb circuit
speed 100
[Code]....
So exchang2 server can be connected to from the outside properly via IP xxx.207.51.231/exchange2-outside, but all outbound connections from this server are going out via IP xxx.122.47.218/circuit-6mb as do all the workstations due to the global address statement.
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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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Nov 24, 2011
I got a Global Implicit Rule problem with my Cisco ASA 5510. Here's my configuration : url...I created a PAT translation so that my web server (group LAN Network) could be accessed from the Internet.Although every rule seems to be ok, i got a "tcp deny access" when i try to telnet my public IP on port 80 (ping is ok).
Why is there only one Global Implicit Rule, and not one for each Interface (like in the older versions of ASA OS) ?
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Oct 24, 2012
We're currently PATing everything from a particular subnet to the IP of an outside interface using our ASA5585 (dynamic PAT). We're experiencing pool exhaustion and therefore need to expand the global IP range. Any way of cutting over to the new range without dropping existing connections? For clarity, the current interface address is x.x.x.37/22 and the new PAT pool is x.x.x.114-6/22.
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Mar 17, 2011
Got an ASA5520 running V8.2(3) and we want to upgrade our internet bandwidth. Our ISP says OK but we need to install different physical circuit, upgrade CPE router, etc.
Then they say, btw your globally allocated IPs will change - this is a problem as we have Site-to-Site VPN Tunnels, IPSEC RA, etc.
ISP are proposing to give us a 3 month period whereby old & new IP blocks will be routed to our ASA (by means of secondary IP address on their Cisco CPE).
Multiple IPs on the same physical i/f on the ASA require sub-interfaces/IP Addresses/VLAN ids on my "outside" i/f.
Is this going to horiibly break Site-to-Site VPN Tunnesl, IPSEC remote access ?
Will VLANs work at all with IPSEC on the "oustide" i/f at all ?
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Jan 23, 2012
Verifying the operation of the ASA when configured with Global access rules. Does the global rule overide the interface security levels? According to the ASA order of operations, the interface specific rule get's processed first and then the global rules, but It does not say anything about interface security levels. Observing an ASA in production that has global rules configured I see that an interface with a security level of 50 that has no rules applied to it, passing traffic to the outside interface (security level 0) drops the traffic. Syslog shows that it hits the global access rule implicit deny. Does the implicit permit any to any less secure interface not apply?
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Apr 26, 2011
nat global entry not showing up in ASDM but it does via CLI see blow, it's a policy NAT.
nat (inside) 5 access-list inside_nat_outbound_4
global (outside) 5 ************-OUTSIDE netmask 255.0.0.0
Global 5 doesnt show in ASDM 6.1 (5) the globals only go up to 3
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Jul 11, 2011
There is a PIX firewall and it has this configured on it.static (inside,outside) tcp interface 3389 192.168.1.250 3389 netmask 255.255.255.255 0 0.This line of code works ok for port 3389 but I want all tcp ports to be translated. Not just 3389.
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May 6, 2011
Based on the network object below, I am looking for confirmation that It is good practice to use this natted object in my ACL applied incoming to the inside interface rather than have another object specifically for the object My_PC. I have tested and it does work, however this is my preffered option rather than having to create 2 objects, for the host and also the natted host.ASA(config)# object network My_PCASA(config-network-object)# host 192.168.33.2ASA(config-network-object)# nat (inside,outside) static 209.165.201.2
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Sep 1, 2011
The order in the older ios was nat 0 then static. With the new ios how is the static nat treated if i have a nat (inside,outside) source static Now I need to do some static one to one nats for some servers in the same subnet as the no nat
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Oct 26, 2011
I am trying to configure static nat on ASA 8.3 but its not working.
here is the configuration:
object network Unix-Server
host 172.16.0.7
description Unix server
object network Unix-Server
nat (Inside,Outside) static 195.44.148.53
its basic configuration where i have my server on the inside network (172.16.0.7) which i want it to be natted to public ip to (195.44.148.53) .
i tried to add an access-list ingress direction on the outside interface to permit traffic from any to the public ip 195.44.148.53 but still its not working.
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Jul 6, 2011
i am doind a policy NAT on the folowing scenarion.
acess-list policy_nat extended permit ip host 10.0.0.1 host 192.168.1.1
static (inside,outempresa) 170.66.53.1 access-list policy_nat
I understand that when host A 10.0.0.1 wants to connect to host B192.168.1.1 its going to be translated to 170.66.53.1 when host 192.168.1.1 wants to connect to10.0.0.1 the same entry will change the destination when the packet hits the asa from 170.66.53.1 to 10.0.0.1, is that correct ?
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May 26, 2011
I just replaced a PIX 501 with a new ASA5505. I had a very weird problem and would like to know what caused it incase I run into it again. The setup is a DSL connection, with an old-ish speedstream DSL modem. Static IP, no PPPoE. I had a PIX 501, then two servers with static NAT entries on secondary WAN IPs. Everything was working fine on the PIX, I just duplicated the config over to the ASA. I swapped out the PIX for the ASA, and rebooted the DSL modem to clear out it's cache. After installation, NAT was working fine for the the global pool, but the systems with static NAT could not get online. I tried lots of different things to fix them, and they never worked. Finally I rememberd running into an issue like this a long time ago, in that the static NAT IP's wouldn't work without giving them a bump-start on the network. So I assigned the ASA each of my WAN IPs, one at a time, and tested them all. After that I went back to the original WAN IP, configured the static NATs, and they fired right up. why did my static NAT entries not work until I first assigned them to the ASA, then swapped back? I did reset the DSL modem when I swapped the firewalls, so I don't believe it was an ARP issue (unless it was an ARP issue at the far end?) I would like to know if there is something I can do differently with the devices or with the config to not have this issue again in the future.
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May 20, 2012
I've been given 4 more public static ip's and would like to use one of them static ip's to point to my sharepoint box, for example i want to be able to access my sharepoint boxweb site externally:
212.xxx.xxx.01 - my public pix ip
212.xxx.xxx.02 - is my owa for email (https://xxxxxxx.net/owa)
212.xxx.xxx.03 - my sharepoint box (https://xxxxxx.net/sharepoint)
212.xxx.xxx.04 - not assigned
What command do I have to input on the Cisco Pix 515 to make that work?
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Nov 30, 2011
I have a firewall which is conntect to a Cisco 870 router.
The router only allows one ip address to ssh into and it which is 7.7.7.7 but the interface which is connected to the router is on the firewall is a 2.2.2.2 and the router interface is a 2.2.2.1.
I can ping the router from the inside of my firewall, but I can't ssh into it at is has a access list which will only allow ssh from the ip address 7.7.7.7.
Would it be possible to do a static NAT which can translate the 2.2.2.2 to a 7.7.7.7 when I ssh into the router when coming from the inside?
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Aug 9, 2011
I have Static NAT on ASA 5520 for mail server and proxy server. I can use it from internet. now i want to Static NAT for 192.168.0.0/24. I mean 192.168.0.241-> 172.29.0.5, 192.168.0.242->172.29.0.6 so on.
I want when 192.168.0.10 hit 192.168.0.241 it goes to 172.29.0.5.
just simple static NAT. which command i need at ASA ? what is GW of 192.168.0.10 pc ?
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Aug 24, 2011
I have configured Static NAT on ASA 8.4; and opened the telnet access through following configuration but it is not working. What mistake I am making in my configuration
interface Ethernet0/0nameif outsidesecurity-level 0ip address 119.36.105.210 255.255.255.240!interface Ethernet0/1nameif insidesecurity-level 100ip address 192.168.117.1 255.255.255.0
hostname(config)# object network Router_A
hostname(config-network-object)# host 192.168.117.2
hostname(config-network-object)# nat (inside,outside) static 119.36.105.211
hostname(config)# access-list ACCESS-TO-SERVER extended permit tcp any host 119.36.105.211 eq telnet
hostname(confi)# access-group ACCESS-TO-SERVER in interface outside
The host (router) 192.168.117.2 can access internet after this configuration but telnet is not possible from outside.
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Sep 19, 2011
We have a Cisco ASA 8.3 and we're trying to configure NAT with multiple types of NAT.
We have a static NAT to an inside host from 1.1.1.2.
Internet Interface is on 1.1.1.3.
Users get NAT (PAT) on 1.1.1.4
VPN Subnet "No NAT" exclusion is from our LAN to various other locations.
Here are the relevent extracts from our configuration:
object network Server
host 172.19.0.80
nat (inside,outside) static 1.1.1.2
object network Inside_LAN
[Code]...
When the VPN exlusion ACL is applied to the configuration, PAT users have no connectivity to the Internet via TCP though UDP and ICMP traffic still passes. The VPN is operational. With the VPN NAT configuration removed, as expected the VPN fails, but users have connectivity to the Internet.
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Aug 25, 2012
We have network topology:
Inside Network (172.168.1.0/27) --- ASA5510----- Outside network (192.168.10.0/24)
ASA5510 have: Inside interface: 172.168.1.30/27; outside interface: 192.168.10.254
And we config:
# object network obj_inside
# subnet 172.168.1.0 255.255.255.224
# nat (inside,outside) dynamic interface
[code]...
So, we í in from outside, we can't access web at 192.168.10.10?
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Jul 5, 2011
I have a server having windows server2003 os. I have configured my web application on this server which is accessible over internet using static ip. But I found that there is an risk of viruses on my server. Thats why now I want to configure this server behind the firewall/Proxy as well as dont want to share my static IP.Is there any way to keep server protected using firewall / Proxy application which is free. And also tell me how to nat the static ip.
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May 25, 2011
Currently a customer has all theLAN devices using a router as the Default Gateway. The router also do the Dynamic NAT to the internet access and has NAT/PAT rules to publish some services like HTTP and FTP. As I know the router will permit all the incoming traffic in all its interfaces without restrictions at less there is an ACLs that restrict the incoming traffic on an specific interface.Now the customer has bought a brand new ASA and wants to use it as the default gateway for the entiery LAN. This means, the ASA will have the internet connection and will be the responsible for the NAT/PAT process.
I have configured the NAT/PAT rules already following the current router configuration, but I need to know if I have to configure ACLs allowing the incoming traffic on th Outside interface for the services I NATed.
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Jan 12, 2012
I have a Cisco ASA5505 running 8.2(1) and I am using ASDM to manage the firewall. I have a Linux VPN server on the inside with and IP address of YYY.YYY.YYY.39 with a static NAT to the outside with an address of XXX.XXX.XXX.171 . I have a site to site VPN tunnel which terminates on the outside of the ASA on the outside interface XXX.XXX.XXX.190 .Traffic from the YYY.YYY.YYY.0/24 network can't transverse the site to site VPN as there is a conflict of IP address's on the far side so it is natted via a dynamic policy to host address ZZZ.ZZZ.ZZZ.100, Users remote into the inside(YYY.YYY.YYY.0/24) for support via the Linux VPN server (.39) and then need to communicate down the site to site VPN. The problem is that the static NAT for the incomming connections takes preference and bypasses the site to site VPN tunnel for outbound traffic. I tried to create a policy Static nat but it tries to modify the static nat that handels the incomming traffic to the Linux server.
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Jan 28, 2013
i have 2 internal server sitting in inside interface
inside network vlan 1 ip address 192.168.0.20, and 192.168.0.22
i going to map 192.168.0.20 to public ip routable address 203.117.124.180 and 192.168.0.22 to public ip routable address 203.117.124.181
the purpose is to make those 2 server 192.168.0.20, and .22 to be able to access remotely using public routable ip address,
however, after done the configuration i still not able to ping or access the public IP Address mention above. my both server are turn on and can access internally.both server are also able to access internet. See below partial configuration retrieve from Show Run.
nat-control
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
nat (Antlab) 1 0.0.0.0 0.0.0.0
[Code].....
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Mar 23, 2013
Recently we migrated our network to ASA 5515, since we had configured nat pool overload on our existing router the users are able to translated their ip's outside. Right now my issue was when I use the existing NAT configured to our router into firewall, it seems that the translation was not successful actually I used Dynamic NAT. When I use the Dynamic PAT(Hide) all users are able to translated to the said public IP's. I know that PAT is Port address translation but when I use static nat for specific server. The Static NAT was not able to translated. Any conflict whit PAT to Static NAT?
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Nov 8, 2011
in ASA 8.4, I need to use to static nat an internal IP with a public IP and use the same public IP to dynamic nat another internal IP:
-nat (inside,outside) source static IP1_PRIVATE IP_PUBLIC
-nat (inside,outside) source dynamic IP2_PRIVATE IP_PUBLIC
All outgoing connection from IP1_PRIVATE and IP2_PRIVATE should be natted to IP_PUBLIC and all incoming connection to IP_PUBLIC should be forwarded to IP1_PRIVATE: is it correct ?
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Aug 30, 2011
I have a 5505 for a small business that has one web server. The web server has a static NAT entry to an IP address and not an interface. There is an access rule allowing any HTTP traffic to the outside IP of the web server. From the web server I can't access the Internet.
All other computers on the network can access the Internet using a dynamic nat rule that uses the outside interface. The web server is accessible from a computer behind the firewall.
If I delete the static NAT entry for the web server I can get on the Internet.
I have turned debugging on and see that an outbound connection is built and then 30 seconds later the connection is torn down with the bytes 0 SYN Timeout message.
I am running 8.0(5).
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May 30, 2011
I'm trying to migrate from olda PIX to newest ASA 8.4.1. Everything seems to be good except the static NAT. [code]
The inside interface uses implicit rule. ( permit any less secure network )
Although te above config the ASA logs the following.
TCP access denied by ACL from 94.94.94.94/2003 to outside:86.101.228.221/80
The 86.101.228.221 our public Internet IP whic are used as outside IP also.
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Mar 9, 2012
One of our customers has asked us to Nat from the LAN to the Voice LAN based on destination IP address in order to access a public phone server through a vendor managed voice router..
Internet for everything else
|
|
Inside ------------------------> ASA 5510 -----------------> Voice router ------> outside to public phone server only
10.10.1.0/20 10.10.1.7/320 172.16.20.1/24
Voice------------------------->
172.16.20.0/24 172.16.20.254/24
Here the ASA5510 has an interface in both networks and the inside network can ping the voice network through the firewall by using non at acls. The phone server can only talk to the 172.16.20.0/24 network. So I need to nat the 10.10.1.0/20 network to the Voice interface on the ASA 172.16.20.254/24.
So I think I need the following static but I get the error below:
static (Inside,Voice) interface 10.10.0.0 net mask 255.255.240.0
WARNING: All traffic destined to the IP address of the Voice interface is being redirected.
WARNING: Users will not be able to access any service enabled on the Voice interface.
ERROR: Invalid net mask with interface option
[Code] .......
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Aug 31, 2012
I have an ASA 5505 behind my internet router. i have got only one public ip configured on the router outside interface.192.168.20.0/24 subnet is configured between ASA and router and inside network is 192.168.10.0/24 (Refer the attached diagram).
I have exposed my mail server and ftp server to public through static PAT in router and ASA with the same public on router outside interface. Iam facing issue some of the machines inside my network internet is not working(actually DNS is not resolving) some of the PC's internet is working fine some of the PC's randomly working. i have attached the diagram and ASA config , after this issue is sorted out i need to configure a L2L VPN to my head office.
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Oct 5, 2011
we are running 8.4(2) on the asa with the below configuration we basically have a static for .7 on .25 and a nat for .7 for port direction with manual nat that takes precedense over auto nat within the object group am I correct that I dontneed the dynamic statement and that its redundant?
-object network obj-10.X.0.25-02host 10.X.0.25
-object network obj-10.X.0.25nat (any,INSIDE) static X.X.X.7 dns
-object network obj-10.X.0.25-01nat (INSIDE,OUTSIDE) static X.X.X.7 service tcp smtp smtp
-object network obj-10.X.0.25-02nat (INSIDE,OUTSIDE) dynamic X.X.X.7
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