NAT and PAT

Similar Questions

• How do I know if I use NAT and PAT for internet connections

  Hello

  I have a PIX 525 6.3 and I have a stupid question... I do a show xlate and I see that I'm using PAT to internet connections... The old man FW says that we come to the internet. What command can I use to confirm this... because it looks like that to me, we use PAT and NAT not for internet connections. I'm you Cisco router and switch engineer but I now have the responsibility of PIX and I want to make sure that everything is correct.

  Thank you

  No question is a STUPID question!

  Issuing the cmd: sho xlate detail and also sho conn detail and it will show you what you are looking for.

  Hope this helps

  Jay

• PIX 501 NAT and PAT with a single IP address

  Using the following configuration, on my first PIX 501, I am unable to provide a server of mail to the outside world and allows inside customers to browse the Internet. :

  6.3 (5) PIX version

  interface ethernet0 car

  interface ethernet1 100full

  ethernet0 nameif outside security0

  nameif ethernet1 inside the security100

  enable password xxxx

  passwd xxx

  hostname fw-sam-01

  SAM domain name

  fixup protocol dns-length maximum 512

  fixup protocol ftp 21

  fixup protocol h323 h225 1720

  fixup protocol h323 ras 1718-1719

  fixup protocol http 80

  fixup protocol rsh 514

  fixup protocol rtsp 554

  fixup protocol sip 5060

  fixup protocol sip udp 5060

  fixup protocol 2000 skinny

  No fixup not protocol smtp 25

  fixup protocol sqlnet 1521

  fixup protocol tftp 69

  names of

  outside access list permit tcp any host 62.x.x.109 eq smtp

  access the inside to allow tcp a whole list

  pager lines 24

  Outside 1500 MTU

  Within 1500 MTU

  IP address outside the 62.177.x.x.x.255.248

  IP address inside 192.168.45.1 255.255.255.0

  alarm action IP verification of information

  alarm action attack IP audit

  location of PDM 192.168.45.2 255.255.255.255 inside

  PDM logging 100 information

  history of PDM activate

  ARP timeout 14400

  Global 1 interface (outside)

  NAT (inside) 1 0.0.0.0 0.0.0.0 0 0

  public static 62.177.x.x.x.45.2 (Interior, exterior) mask subnet 255.255.255.255 0 0

  outside access-group in external interface

  group-access to the Interior in the interface inside

  Route outside 0.0.0.0 0.x.x.x.177.208.105 1

  Timeout xlate 0:05:00

  Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225

  H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00

  Sip timeout - disconnect 0:02:00 prompt Protocol sip-0: 03:00

  Timeout, uauth 0:05:00 absolute

  GANYMEDE + Protocol Ganymede + AAA-server

  AAA-server GANYMEDE + 3 max-failed-attempts

  AAA-server GANYMEDE + deadtime 10

  RADIUS Protocol RADIUS AAA server

  AAA-server RADIUS 3 max-failed-attempts

  AAA-RADIUS deadtime 10 Server

  AAA-server local LOCAL Protocol

  Enable http server

  http 192.168.45.0 255.255.255.0 inside

  No snmp server location

  No snmp Server contact

  SNMP-Server Community public

  No trap to activate snmp Server

  enable floodguard

  Telnet 192.168.45.0 255.255.255.0 inside

  Telnet timeout 5

  SSH timeout 5

  Console timeout 0

  dhcpd lease 3600

  dhcpd ping_timeout 750

  : end

  It is I'am using access list and groups wrong or am I wrong in PAT/NAT configuration.

  Please advise...

  Hello

  I went through the ongoing discussion. The pix configuration should be fine for now according to suggestions. The problems seems to be on the server. If it is a new installation of windows, then there is an option not to accept requests that are not local network.

  If you want to check if pix allows connections and then when you telnet to port 25 of the outside, just run the xlates control.

  SH xlate and it should show you a translation for the inside host. More than a quick test if pix allows traffic is to check 'sho-outdoor access list' and see if the counters are increasing.

  Hopefully this should help you.

  Arun S.

• Gateway of last resort and PAT

  Hello

  I have a beginner-ish question.  Currently, we have 2 ISPS enter into our router, sprint and comcast.  Our gateway of last resort is set to Comcast.  Our users are also access internet through PAT, with an IP of Comcast address.  If I change the gateway of last resort for the Sprint, what effect that will have on the users?  Are they going to send traffic through the Comcast line, since it is the address assigned to them, or they will send the traffic through Sprint?

  Hi Scott,.

  for the inside of the NAT, routing is always performed before NAT and Yes, you could use PBR to send traffic to the new stretch following ISP.

  Kind regards.

  Alain

  Remember messages useful rate.

• Order of procedure SonicWALL for routing, NAT and policies

  I'm confused on the prescription that the sonicwall verifies a package.  The way I heard the order, it will:

  (1) check against the access rules,

  (2) check against NAT Polies

  (3) check the routing.

  Installation program:

  Subnet point of VPN endpoint - Internet - SW NSA 2400 (VPN) - sub-network B (from C subnet)

  A subnet is 10.1.100.x/24

  Subnet B is consists of three IPs, 192.168.99.4,.50, and 109.

  Subnet C is contains the host IPs 192.168.13.4,.50, and 109.

  I VPN configured to allow traffic from 10.1.100.x to the hosts on the subnet B, what NAT and the host subnet C.  This method works more large, is not a problem.

  I need to reduce access to certain ports.  Once I set access restrictions in the port, the firewall blocks ALL.

  When I look at a screenshot of packets when traffic is blocked, I see the following:

  Source 10.1.100.5--> 192.168.99.4 accepted

  Source 10.1.100.5--> 192.168.13.4 refused.

  Block of code indicates that it is because of politics.  However the policy review should have been checked and checked already.  If I change the VPN policy to represent both sides of the NAT (ie. 192.168.99.4 and 192.168.13.4) then passes the traffic.

  If anyone can explain what is happening?

  I tried to look through some KB SonicWall has publicly available articles. But I did not see anything that doesn't seem to help. In this case, I think you might want to give SonicWall support a call.

  https://support.software.Dell.com/manage-service-request

  They can help to look over your configurations and see if we have to make changes. They should also be able to answer your technical questions about how the packets are received or managed.

• IPSec Tunnel between Cisco 2801 and Netscren 50 with NAT and static

  Hello

  My problem isn't really the IPSec connection between two devices (it is already done...) But my problem is that I have a mail server on the site of Cisco, who have a static NAT from inside to outside. Due to the static NAT, I do not see the server in the VPN tunnel. I found a document that almost describes the problem:

  "Configuration of a router IPSEC Tunnel private-to-private network with NAT and static" (Document ID 14144)

  NAT takes place before the encryption verification!

  In this document, the solution is 'routing policy' using the loopback interface. But, how can I handle this with the Netscreen firewall. Someone has an idea?

  Thanks for any help

  Best regards

  Heiko

  Hello

  Try to change your static NAT with static NAT based policy.

  That is to say the static NAT should not be applicable for VPN traffic

  permissible static route map 1

  corresponds to the IP 104

  access-list 104 refuse host ip 10.1.110.10 10.1.0.0 255.255.0.0

  access-list 104 allow the host ip 10.1.110.10 all

  IP nat inside source static 10.1.110.10 81.222.33.90 map of static route

  HTH

  Kind regards

  GE.

• Clarification of authentication PIX NAT and BGP

  Hi all

  I did some tests on PIX and crossing this area of BGP traffic.

  When I configure the PIX to do no config NAT (NAT 0) and configure a BGP session between two routers (one inside) and the other on the outside net everything works fine.

  When I configure BGP authentication, I may add the keyword "norandomseq" NAT and STATIC commands cause BGP auth embedded TCP header for authentication information. It's OK.

  But when I reconfigure the PIX to make real NAT between the inside and the outside network and reconfigure my routers, BGP session doesn't happen if BGP authentication has been disabled. If I enable authentication BGP, I had errors of MD5 authentication on routers. (Note "norandomseq" is enabled for NAT and STATIC instructions)

  Now my question is BGP unsupported for NAT on PIX sessions? (for my tests, it has worked for NAT 0 config, also all the examples that I always found working with NAT 0 config)

  I think the problem is that the TCP pseudo-header changes to the NAT device and therefore it will never work right? Or is there any correction internal bgp which should fix this? I think it's almost impossible that this is known with the password simple bgp, right?

  Concerning

  Michael

  Your reasoning is dead the. BGP authentication works like this: the sending peer BGP takes and MD5 hash of the TCP header before sending the package and includes this hash in the TCP header option. The BGP receiver receives the packet and also did a MD5 hash of the TCP header. Then, it compares its value to the value sent by the sender of BGP. If they match, all right. If they fail, the packet is ignored and you get error messages, did you see.

  Because the NAT will change the address source TCP, the TCP header will be changed which should bring a different MD5 hash for the receiver that the sender originally sent.

  BGP peer by a PIX authtenticatio is supported only in a Nat 0 or static identity with the norandomseq option is enabled.

  Make sense?

  Scott

• Issue of ASA NAT and routing

  Hello

  I have a question about NAT and routing on the SAA. I'm relatively new to ASA and don't know if it works or not. I have a pool of public IP (209.x.x.x/28) that routes my ISP to the external interface of my ASA. IP was assigned address for the outside of the ASA is an address of 206.x.x.2/24 with a default GW of 206.x.x.1. I intend using NAT to allow my web/mail servers on the DMZ (192.168.x.x) use 209.x.x.x addresses. However, I do know how to make it work since I'm not arping on any interface for 209.x.x.x addresses as they will be sent to the 206.x.x.2 address by the ISP. Can I just set up a translation NAT (on the external interface?) of the 209.x.x.x on 192.168.x.x address and the ASA will figure it out?

  Thanks for the help.

  Todd

  The ASa will figure it out, he will answer ARP queries for all that he has set up in a "static" command As long as th PSIA routes 209.x.x.x directly to the ASA addresses then it should all work fine.

  You just need to add lines like the following:

  static (dmz, external) 209.x.x.x netmask 255.255.255.255 192.168.x.x

  for each of your internal servers in the DMZ. Then an access-list to allow only HTTP/SMTP/etc through these addresses 209.x.x.x.

  list of allowed inbound tcp access any host 209.x.x.x eq smtp

  list of allowed inbound tcp access any host 209.y.y.y eq http

  Access-group interface incoming outside

• NAT and VMware View

  I am

  try again using VMware View, where a person uses a VPN to

  connect to my view of the Park, but my connection to the server is running NAT, and

  the client tries to connect in my Park he cannot get the virtual

  machine. Are there restrictions? Any tips?

  If you have found this information useful, please consider awarding points to 'Correct' or 'Useful'*.

  Exactly THAT PCOIP do not work on the Security server.  If your using VPN and connect to a broker internal conection it should work good as new NAT could shake things.    Should be a simple test however.

  If you have found this device or any other useful post please consider the use of buttons useful/correct to award points

  Twitter: http://twitter.com/mittim12

• PAT/NAT and VPN through a PIX

  "PPTP through the PIX with Port address translation (PAT) does not work because there is no concept of ports in GRE"-this is an excerpt from a config PIX version 6.2 and below.

  1. how this problem has been fixed in 6.3? GRE is encapsulated in udp or tcp to use ports to follow the connection?

  2. is it "fixup protocol esp-ike" use the same technology - the source port created by the IKE protocol? -ISAKMP cannot be enabled when you use this command

  3. What is "isakmp nat-traversal? How is this different from fixup protocol esp-ike"

  Thank you

  RJ

  1. when the PIX sees outgoing PPTP (TCP 1723 port) packets it now opens holes for them to return, as well as opening a hole for the GRE packets, it has never done this before. The PPTP TCP packets can be PAT would be fine because they are TCP packets. GRE packets, I believe, are followed by the id field only tunnel in the package.

  2. we use the source port of the ISAKMP packet for ESP packets as well. The current limitation is that if you have this option, you cannot use the PIX to close the IPSec sessions, so you can not turn on ISAKMP any interface. You can also have only a single IPSec client internal to use this feature.

  3 NAT - T is a new standard for IPSec to work through a NAT device peers, because they detect changes of address during the negotiation of tunnel and automatically encapsulate packets in UDP 4500. This market allows the PIX and the other device (if it supports it) to automatically detect a NAT/PAT device between them. This differs from the "esp - ike correction '' that the PIX ends not in fact the IPSec tunnel with esp - ike, but it is the endpoint in nat - t.

• Trying to we object-group and PAT

  I try to configure dynamic PAT on a Cisco ASA 5510 with the help of a group of objects and difficulties.

  How to use a group object, which includes five subnets as the source for NATing to a dynamic address PAT?

  Hello

  Good if you have already created the Group of objects (say it's called internal_subnets)

  NAT must therefore:

  NAT interface Dynamics internal_subnets source (indoor, outdoor)

  In the last example, he'll get patted on the external interface, if you want it TAPE to a different IP address for the external interface simply create a host network object and use it on the NAT instead of the keyword interface.

  Kind regards

  Julio

• Types of NAT and security

  Question: What should I do to get the NAT on my PlayStation 1 type while keeping the type NAT 2 on my other devices?

  Hello! I connected an AirPort Express into my modem. The AirPort Express gives me type NAT 2 on my units, which is good. However, my PlayStation 4 has a lot of problems connecting to games online with this NAT type. I would get the type of NAT 1 on my PlayStation, while keeping type NAT 2 on the rest of my devices for security reasons.

  The two options I can imagine are the following:

  1. Changing the type of PlayStations NAT without compromising the security of other devices is directly connect the PlayStation to the modem with an ethernet cable. Again, I would not a cable through half of my house, and so I would like to know if there are other options.
  2. Buy a new separate router and have two totally airtight networks, then use port forwarding to get NAT type 1 on one of the routers.

  Change the NAT type to open (1) for all devices is not an option, because it will change the security settings.

  Please see the following Tip of an airport users for more details on the types of NAT for PS 3/4 consoles with AirPort base stations.

• NAT and WS-C3650-24TS-L

  Hello everyone, I'm trying to find a recent nat support matrix for switches catalyst, especially for the WS-C3650-24TS-L that I bought last year.

  The only thing I could find was 2006 and can not find a recent. We know that this model supports the NAT? Thank you!

  Hello

  NAT is not supported on 3650 s.

  You can check what functionality is supported on what platform quickly and easily using the Cisco navigation feature.

  http://CFN.cloudapps.Cisco.com/ITDIT/CFN/JSP/SearchBySoftware.jsp

• Access to services: conflict NAT and VPN

  Hi people!

  I encountered a problem with external access to local services of:
  (a) remote clients (port open on the side WAN)
  (b) the remote sites (through IPsec tunnels)

  Here's a topology:

  

  EXPLANATIONS

  FW1 (actually from TMG 2010) overload NAT of preforms.

  The service in question (for example tcp 9999) is published on 192.168.100.0/24 via static NAT translation, which is accessible from the network.

  HQ1 is a border router (cisco 2921). It also performs NAT overload for public addresses. (Other than cisco) Branch1 also performs NAT overload.

  All traffic between the headquarters and the remote site is allowed. The service is accessible from the remote site.

  PROBLEM

  I want to allow access to the service for an external user (remote user). I do the following configuration:

  IP nat inside source static tcp 192.168.100.2 2.2.2.2 9999 9999 extensible

  After this command remote user is able to access the service by public IP, BUT the site's users remote losing it. If I roll back with

  No nat ip inside the source static tcp 192.168.100.2 2.2.2.2 9999 9999 extensible

  then access to the remote site is restored, and remote user lose again. Seems that it is connected with the static NAT translations.

  How can I make it work in both cases of simulteniously? Both for the remote site and the remote user.

  Thank you!

  You must use a map of the route with your static NAT configuration.

  Recently answered a question for the same thing, please visit this link and if you have any questions please come back.

  https://supportforums.Cisco.com/discussion/12544291/IPSec-IP-NAT-inside-source-static

  Jon

• VRF-lite, NAT and route-leak

  Hello, community. I'm trying to reproduce the installation with two clients (R1 and R2) program, router PE (R3) and common services (R4).

  Here is the configuration:

  R1:

  interface Loopback0

  IP 10.10.1.1 255.255.255.255

  !

  interface FastEthernet1/0

  192.168.15.1 IP address 255.255.255.0

  !

  IP route 0.0.0.0 0.0.0.0 192.168.15.5

  R2:

  interface Loopback0

  10.10.2.2 IP address 255.255.255.255

  !

  interface FastEthernet1/0

  IP 192.168.16.1 255.255.255.192

  !

  IP route 0.0.0.0 0.0.0.0 192.168.16.5

  R3:

  IP vrf VRF1

  RD 1:1

  export of road-objective 1:1

  import of course-target 1:1

  !

  IP vrf VRF2

  Rd 2:2

  Route target export 2:2

  import of course-target 2:2

  !

  interface FastEthernet0/0

  R1 description

  IP vrf forwarding VRF1

  IP 192.168.15.5 255.255.255.192

  IP nat inside

  IP virtual-reassembly

  !

  interface FastEthernet0/1

  R2 description

  IP vrf forwarding VRF2

  IP 192.168.16.5 255.255.255.192

  IP nat inside

  IP virtual-reassembly

  !

  interface FastEthernet1/0

  R4 description

  IP 1.1.1.1 255.255.255.0

  NAT outside IP

  IP virtual-reassembly

  !

  IP route 0.0.0.0 0.0.0.0 1.1.1.2

  IP route vrf VRF1 0.0.0.0 0.0.0.0 FastEthernet1/0 overall 1.1.1.2

  IP route vrf VRF1 10.10.0.0 255.255.0.0 192.168.15.1

  IP route vrf VRF2 0.0.0.0 0.0.0.0 FastEthernet1/0 overall 1.1.1.2

  IP route vrf VRF2 10.10.0.0 255.255.0.0 192.168.16.1

  !

  IP nat inside source list 15 interface FastEthernet1/0 vrf VRF1 overload

  VRF2 of the IP nat inside source list 16 interface FastEthernet1/0 vrf, overload

  !

  access-list 15 allow 192.0.0.0 0.255.255.255

  access-list 15 allow 10.10.0.0 0.0.255.255

  access-list 16 allow 192.0.0.0 0.255.255.255

  access-list 16 allow 10.10.0.0 0.0.255.255

  R4:

  interface Loopback0

  IP 10.10.10.10 address 255.255.255.255

  !

  interface FastEthernet0/0

  1.1.1.2 IP 255.255.255.0

  !

  IP route 0.0.0.0 0.0.0.0 1.1.1.1

  The configuration is not operational.

  R1 #ping 192.168.15.5

  Type to abort escape sequence.

  Send 5, echoes ICMP 100 bytes to 192.168.15.5, wait time is 2 seconds:

  !!!!!

  Success rate is 100 per cent (5/5), round-trip min/avg/max = 68/89/116 ms

  R1 #ping 192.168.15.5 source l0

  Type to abort escape sequence.

  Send 5, echoes ICMP 100 bytes to 192.168.15.5, wait time is 2 seconds:

  Packet sent with the address 10.10.1.1 source

  !!!!!

  Success rate is 100 per cent (5/5), round-trip min/avg/max = 68/86/92 ms

  R1 #ping 1.1.1.1 source l0

  Type to abort escape sequence.

  Send 5, echoes ICMP 100 bytes of 1.1.1.1, time-out is 2 seconds:

  Packet sent with the address 10.10.1.1 source

  .!!!!

  Success rate is 80% (4/5), round-trip min/avg/max = 292/357/400 ms

  R1 #ping 1.1.1.2 source l0

  Type to abort escape sequence.

  Send 5, echoes ICMP 100 bytes to 1.1.1.2, time-out is 2 seconds:

  Packet sent with the address 10.10.1.1 source

  .!!!!

  Success rate is 80% (4/5), round-trip min/avg/max = 216/187/160 ms

  R1 #ping 10.10.10.10 source l0

  Type to abort escape sequence.

  Send 5, echoes ICMP 100 bytes of 10.10.10.10, time-out is 2 seconds:

  Packet sent with the address 10.10.1.1 source

  .....

  Success rate is 0% (0/5)

  I can't ping R4 loopback address ("shared resource" or also known as the "common service")

  It is the same with R2 (second customer).

  But I can still ping loopback R4 of R3:

  R3 #ping 10.10.10.10

  Type to abort escape sequence.

  Send 5, echoes ICMP 100 bytes of 10.10.10.10, time-out is 2 seconds:

  !!!!!

  Success rate is 100 per cent (5/5), round-trip min/avg/max = 40/88/116 ms

  It's the routing on R3 table:

  R3 #sh ip road | start the gateway

  Gateway of last resort is 1.1.1.2 network 0.0.0.0

  1.0.0.0/24 is divided into subnets, subnets 1

  C 1.1.1.0 is directly connected, FastEthernet1/0

  S * 0.0.0.0/0 [1/0] via 1.1.1.2

  R3 #sh ip route vrf VRF1 | start the gateway

  Gateway of last resort is 1.1.1.2 network 0.0.0.0

  192.168.15.0/26 is divided into subnets, subnets 1

  C 192.168.15.0 is directly connected, FastEthernet0/0

  10.0.0.0/16 is divided into subnets, subnets 1

  S 10.10.0.0 [1/0] via 192.168.15.1

  S * 0.0.0.0/0 [1/0] via 1.1.1.2, FastEthernet1/0

  R3 #sh ip route vrf VRF2 | start the gateway

  Gateway of last resort is 1.1.1.2 network 0.0.0.0

  10.0.0.0/16 is divided into subnets, subnets 1

  S 10.10.0.0 [1/0] via 192.168.16.1

  192.168.16.0/26 is divided into subnets, subnets 1

  C 192.168.16.0 is directly connected, FastEthernet0/1

  S * 0.0.0.0/0 [1/0] via 1.1.1.2, FastEthernet1/0

  So the question is what is the cause of the problem? How to troubleshoot? What is the troubleshooting steps?

  Hi Eugene Khabarov

  His does not work since the address IP of Destination that represents common Services is be routed locally to the THIS itself. That's the problem here. We must ensure that the Destination subnet is not pointing to what is happening here.

  R4:

  interface Loopback0

  IP 10.10.10.10 address 255.255.255.255

  !

  R3-VRF1

  S 10.10.0.0 [1/0] via 192.168.15.1

  Concerning

  Verdier