PAT on PIX

Similar Questions

• PAT on PIX vs NAT overload on router

  Better question practice...

  It's better to perform PAT through a NAT overload on a router bastion with a static on the PIX instruction or PAT on the PIX configuration uses a global IP address?

  Other alternatives?

  Example of router *.

  Router configuration

  IP nat FirstPAT 172.16.5.100 pool 172.16.5.100 255.255.255.0

  FirstPAT IP nat source list 10 overload

  access-list 10 permit 10.10.10.0 0.255.255.255

  PIX installation

  static (inside, outside) 10.10.10.0 10.10.10.0 netmask 255.255.255.0

  Example of PIX *.

  Global (Outside) 1 172.16.5.100

  NAT (inside) 1 0 0

  Thanks in advance for all the messages!

  In my opinion, there is no real compelling reasons to go with one idea on the other. Probably, I would lean towards leaving the PIX do NAT, but I could be swayed. The reason is that the PIX has essentially already been NAT (all back on the same address). But again, either should be good.

  A suggestion however if you went with overloading NAT on the router would be to do it with a map of the route as opposed to the example of access list you have. Something like this:

  IP nat FirstPAT 172.16.5.100 pool 172.16.5.100 255.255.255.0

  IP nat source map route nat FirstPAT overload

  route nat allowed 10 map

  access-list 10 permit 10.10.10.0 0.255.255.255

  This creates a NAT entry in the NAT table on the router.

  Good luck.

  Scott

• PIX - Access behind full PAT

  Hello

  Is it possible to have full access to the machine within the network (behind PIX using PAT) from outside? Not only a specific port, but all the ports for all machines within the network? If so, please guide me.

  Thank you

  Iltiaz

  No, by its very definition is PAT * Port * address translation. If you need to have full access to a mailbox, you need to set up a static NAT 1 to 1 with a command

• PAT on IPSEC VPN (Pix 501)

  Hello

  I work to connect a PIX 501 VPN for a 3rd party hub 3015. The hub requires all traffic to come from a single source IP address. This IP address is assigned to me as z.z.z.z. I have successfully built the VPN and tested by mapping staticly internal IP with the IP address assigned, but cannot get the orders right to do with PAT in order to have more than one computer on the subnet 10.x.x.0. This Pix is also a backup for internet routing and NAT work currently as well for this.

  I can redirect traffic to my subnet to the remote subnet via the VPN, but I can't seem to get the right stuff PAT to the VPN using the assigned IP address. If anyone can give me some advice that would be great.

  lines of current config interesting configuration with static mapping:

  --------------------------------------------------------------------------

  access-list 101 permit ip 10.0.0.0 255.255.255.0 y.y.y.0 255.255.255.0

  access-list 102 permit ip y.y.y.0 255.255.255.0 z.z.z.z host

  access-list 103 allow host ip y.y.y.0 255.255.255.0 z.z.z.z

  IP address outside w.w.w.1 255.255.255.248

  IP address inside 10.0.0.1 255.255.255.0

  Global 1 interface (outside)

  NAT (inside) - 0 102 access list

  NAT (inside) 1 0.0.0.0 0.0.0.0 0 0

  public static z.z.z.z (Interior, exterior) 10.x.x.50 netmask 255.255.255.255 0 0

  Route outside 0.0.0.0 0.0.0.0 w.w.w.2 1

  correspondence address card crypto mymap 10 103

  mymap outside crypto map interface

  ISAKMP allows outside

  Thank you!

  Dave

  Dave,

  (1) get rid of static electricity. Use more Global/NAT. The static method will create a permanent

  translation for your guests inside and they will always be this way natted. Use

  NAT of politics, on the contrary, as shown here:

  not static (inside, outside) z.z.z.z 10.x.x.50 netmask 255.255.255.255 0 0

  Global (outside) 2 z.z.z.z netmask 255.255.255.255

  (Inside) NAT 2-list of access 101

  (2) the statement, "nat (inside) access 0 2' list will prevent nat of your valuable traffic."

  Delete this because you need to nat 2 nat/global card. (as a general rule, simply you

  If you terminate VPN clients on your device and do not want inside the traffic which

  is intended for the vpn clients to be natted on the external interface).

  (3) with the instructions of Global/nat 2, all traffic destined for the remote network will be first

  translated into z.z.z.z. Then your card crypto using the ACL 103 will encrypt all traffic which

  sources of z.z.z.z for y.y.y.0 24. This translation wil happen only when traffic is destined for the vpn.

  I hope this helps. I have this work on many tunnels as you describe.

  Jamison

• Newbie user-NAT, PAT, the two PIX?

  Hello

  I'm test I set up my PIX 515e barriers make the lives of my users living hell, and I don't know I do NAT PAT or both.

  I have an internet connection through a cable modem that is currently connected to a Linksys router. I'll say goodbye to Linksys and use only the PIX.

  So my question is do I need to NAT or PAT from the outside to the inside and don't I need of NAT or PAT on the inside? To make that more complicated things that do, I do with my DMZ?

  A side not I currently use the linksys to the port before MS Office an interior workstation remotely, can I still do?

  Thanks for any help, somebody has.

  Marc

  Hi Marc,

  The document you need is:

  http://www.Cisco.com/warp/public/707/28.html

  Hope this helps and let me know if you need further information/assistance and good luck with CCNA.

  Thank you - Jay.

• PIX, VPN, PAT and static

  I want to activate an incoming and outgoing VPN on a PIX configured with PAT. I enabled ESP and UDP/500 on the appropriate access to the lists, but must provide a static for inbound traffic. I already use a static for incoming SMTP traffic, and I don't see how to do the same thing for udp/500, but how do I ESP traffic?

  Any suggestions gratefully received.

  If you are referring to a static port, you can create one for ESP since static port can only be created for TCP/UDP and ESP is located just above the intellectual property, it is NOT a TCP/UDP protocol. You will need to create a one-to-one static for this internal VPN server and have your clients to connect to this address. This will chew global IP address to another one, sorry.

• PIX, pat and static

  Hi all

  I have a pix connect my Internet when you run pat. (only a single public address)

  I would like to install a mail server on my private network.

  do I need a second public ip address or can I make a static with port 25 on the same ip address add that my global nat?

  Thanks in advance

  Hello

  You do not need another public address to the internal mail server. You can simply create a static port using the PAT address as the global address to the static. For example, something like this should work fine:

  static (inside, outside) tcp host 25 25

  I hope this helps.

  Scott

• Destination NAT/PAT pix

  I have a pix 506 (ver 6.3) running PAT for internet access. Now, I must create a VPN to a third party and need to NAT source ip addresses. Is it possible to have separate NAT basin which is only used when the destination is the third network (that uses private address). Basically, NAT based on destination ip address.

  You can also one-third have a vpn 3 k. Can they NAT my source ip when packets are decrypted at their end before sending them to the final destination with a LAN-to-LAN NAT rule. I don't know that I read somewhere that even if a static mapping on the NAT of LAN-to-LAN rule suggests for this, it won't work.

  Thanks in advance

  Jon

  You want "Policy NAT", which is described in the documentation for PIX 6.3 here:

  http://www.Cisco.com/univercd/CC/TD/doc/product/iaabu/PIX/pix_sw/v_63/config/bafwcfg.htm#1113601

  The VPN 3000 not NAT in this sense, to do it in the PIX is your best option (only).

  HTH - good luck!

• DNS traffic blocked after PAT - PIX 515

  I have PIX 515 with 3 named NIC (internal, external, dmz)

  I have 2 servers (Exchange and Windows 2000 with SMTP) in the demilitarized zone.

  I currently have a static command pointing to doamin for exchange Server IP address in the DMZ.

  I wanted to PAT on the IP address of the e-mail domain so that the configuration will look like as follows.

  The IP field will be used for the global IP

  all pop3 for global ip traffic will go to Exchange

  all www for the global IP traffic will go to Exchange

  all smtp for global ip traffic will go to the Windows 2000-based SMTP relay (SMTP relay is configured to send the e-mail received in exchange Server)

  I hosted DNS udp and tcp traffic to the servers.

  before pat, the server can use DNS to resolve IP domain e-mail and send mail to the Internet.

  As soon as I PAT the Internet e-mail delivery stops.

  When I did an NSLOOKUP command returns an error indicating that the DNS server cannot be resloved.

  The servere DNS used by these 2 servers are servers DNS of ISP.

  Is there any concern when you PAT.

  Thank you

  Hello

  I found the problem:

  for now, your dmz servers can go to the internet with pop3, smtp, and www. Only for these protocols is a (static) translation to provide in the config file.

  You will need to will provide you a translation for other protocols (for example, dns) also. This can be accomplished with one of the following two things:

  create a nat - pair overall for the DMZ for outdoor

  NAT (dmz) 1 0.0.0.0 0.0.0.0

  Global (outside) 1 200.100.100.168 (already exists)

  create a static translation for each of the other protocols (next to pop3, smtp, www), you want to pass from the dmz to the internet (you already did that for www, pop3 and smtp).

  Kind regards

  Tom

• With PAT on Cisco PIX VPN client

  Dear all,

  I have a PIX 515 to the main site with the IPSec security is enabled. Homepage user using 3.x VPN client connects to the PIX for VPN access. When user Home use real IP, I can ping to the local network of the main site. However, when the Home user using a router with PAT, the VPN can be established.

  Is there a setting I should put on PIX, VPN client or router?

  Thank you.

  Doug

  And if you still have problems, upgrade your pix, 6.3 and usage:

  ISAKMP nat-traversal

  But the first thing would be to check the IPSEC passthrough as Ade suggested. If the device is a linksys check the version of the firmware as well.

  Kind regards

• 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.

• 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.

• PIX 501 NAT / PAT problem

  Have a 501 for a client configuration. All works well for a few minutes and they the PC can't get out the firewall. Looks like the NAT works very well but the PAT do not hit.

  This part of the config, I received an example of cisco.

  Can someone help me?

  Thank you

  Fred

  With less than 25 PCs behind the PIX you won't have to worry about memory problems. You will have to look for good of licensing issues. The default 501 supoprts 10 users license and can be upgraded to support 50 users - still no need to worry about memory.

  Regarding the counters on the PIX, I usually recommend to leave all timers with settings by default unless you are having problems and TAC allows you to change them.

  -Mark

• Redirect pat interface on a PIX PPTP

  Is it possible to redirect traffic PPTP from the external interface of a PIX, which has a unique IP address or are you really to have an any translated IP peripheral PPTP termination.

  Example, I have a PIX with a unique public IP I have to redirect ports 23 25 53 110 to an in-house 2 k server. I would be able to redirect traffic to this server pptp also or will I have problems with the gre and need a new ip address?

  Patrick Laidlaw

  GRE will cause you problems. PPTP uses GRE (Protocol IP 47) at the time and TCP 1723 port. You will be able to redirect TCP/1723, but not the GRE traffic.

  To do this, you will need a separate IP address.

• Dynamic PAT on the PIX

  Hi Expert,

  If I want the range of dynamic ports NAT in 5500 to 5800, in my address public IP that a NAT IP address private, how to set up?

  Here is an example,

  public IP = x.x.x.x

  address private IP = z.z.z.z

  NAT x.x.x.x port 5500-5800 to z.z.z.z port 5500-5800

  The PIX firewall running OS 6.3 (4).

  Customer actually needs to activate it for ftp trffic which allow customers can dynamic port within the range of 5500 and 5800.

  Hope someone can help me on this, thank you.

  Rgds,

  To the Shaw feel Yeong

  I checked your configs... the only option you have is of static type using 219.95.73.28 which is not yet used.

  public static 219.95.73.28 (inside, outside) 200.1.1.X netmask 255.255.255.255

  access-list 101 permit tcp any host 219.95.73.28 range 5500-5800

  I also see that remotely using remote desktop access from the Internet. Make your customer aware that this kind of access are a risk of security as user names and passwords travel on clear text. I suggest remote VPN set up for remote access. Anyway... the instructions above will solve your current problem.

  Please rate if you find it useful