PIX, VPN, PAT and static

Similar Questions

• 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

• VPN client and contradictory static NAT entries

  Hello, we have a VPN IPSEC implemented on a router for remote access. It works very well, for the most part. We have also a few PAT static entries to allow access to a web server, etc. from the outside. We deny NATting from the range of IP addresses for the range of VPN client and it works except for entries that also have PAT configurations.

  So, for example, we have web server 10.0.0.1 and a PAT redirection port 10.0.0.1: 80 to the IP WAN port 80. If a VPN client tries to connect to 10.0.0.1: 80, the syn - ack packet back to the customer WAN IP VPN on the router! If the VPN client connects to the RDP server 10.0.0.2:3389, it works very well that this server is not a static entry PAT.

  Is there a way to get around this?

  Thank you!

  There is a way to get around, use the same settings you have for your dynamic nat in your nat staitc entries, something like this:

  Currently, it should show as:

  IP nat inside source static XXXXX XXXX 80 80

  you need to take it

  IP nat inside source static 80 XXXX XXXX 80 map route AAAA

  When your itinerary map YYY refers to something with an acl that you refuse traffic from inside your router for the pool of vpn

  IP Access-list ext nonat

  deny ip 10.0.0.0 0.0.0.255

  Licensing ip 10.0.0.0 0.0.0.255 any

  route allowed AAAA 10 map

  match ip address sheep

  You even need all the static PAT

  HTH

  Ivan

• 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

• 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 525 config and VPN configuration

  Hello

  I was asked to work on a customer request to replave sound no cisco FW with a pix 525 and also lead to a VPN solution using this PIX 525.

  I'm not a FW as my main experience is with Routing/Switching, but I have read some documentation and had some hands on a client of vpn300 501 PIX and cisco.  I managed to make it appear the vpn connection, even if all tests have failed (you need to solve any further).

  Customer has its main site with an application that runs on a Web server that must be accessed only through the vpn to: 3rd party + a few remote users.

  The solution, I want to propose to the client is:

  option 1:

  PIX 525 as a vpn server + Cisco vpn 3000 client on all PCs of remote users.

  option 2:

  PIX 525 as a vpn server + vpn client windows on all PCs of remote users

  option 3:

  PIX 525 as vpn + PIX 501 to 3 rd party server + vpn client windows on all PCs of remote users

  First I want to confirm that these motions are feasible.  So which option should I go for knowing that the remote users are only about 10.

  Client doesn't no Ganymede or RADIUS should go for statis userid/pass set up on PIX525?

  Any idea, advice, suggestion is welcome.  Thanks in advance

  Kind regards

  ngtelecom

  Hello

  Option 1

  In my opinion, is the best solution because the PIX 525 will act as a firewall and the VPN server.

  Then, all the clients connect via VPN using Cisco's VPN IPsec client software.

  Option 2

  The advantage of this option is that you do not need to install VPN software on clients (not a problem, only 10 clients)

  The problem is that it does not come with split tunneling and don't provide as good protection as Cisco software.

  Option 3

  This is also valid, and you can do an EasyVPN connection where the 525 is the server and the 501 to the customer.

  Local authentication on the PIX 525 sounds great.

  As a recommendation, the PIX are EoS and the replacement are the ASAs.

  It will be useful.

  Federico.

• PIX version 6.3 and static priority

  Hi all

  This question concerns do differnet kinds of static on a pix6.3 (4).

  I have a setup where I need static nat public IP address on a mail server on the network private.

  It works very well. Now, I also want to expose the inside of the network to the public side (as shown in the example config)

  inside the ip 192.168.1.x

  Apart from the ip 55.55.44.x

  public static 55.55.44.33 (Interior, exterior) 192.168.1.10 netmask 255.255.255.255 0 0<- mail="">

  static (inside, outside) 192.168.1.0 192.168.1.0 netmask 255.255.255.0 0 0

  Now... the mail server-specific static will resume precende the translation of net-to-net?

  Kind regards

  Hey Kevin,

  Too much honing ip can be solved by leaving the 192.168.1.0/24 network at the end of the static instructions. When a packet arrives at the external interface, the pix treats all the static instructions from top to bottom. Because the mail server is configured before the net NET, this statement will be precende. (for code 6.3)

  Mike

  Mike

• 3.5.1 to 506th Pix VPN Client using IPsec over TCP

  Is it possible to do when there is a device in the path of the VPN tunnel that will make the static NAT?

  The reason is that the external interface of the Pix will have a private address, and it is the endpoint of the tunnel. The performance of NAT device has a public address, who thinks that the VPN client is the end of the tunnel, the static NAT will result the incoming packets on port UDP 500 for a destination of the Pix.

  Thank you.

  The Pix can not do TCP encapsulation. He can do UDP encapsulation.

  You can create IPSec tunnels to the external of the Pix even if address he addresses NATted provided that it is NOT of PAT and NAT.

• PIX vpn public dmz

  Hello

  I d wishes to establish a vpn to a pix firewall 515 and pos version

  7.0 (5) with a public dmz and nat translation.

  inside: 10.5.10.0/24

  outdoors: 1.1.1.1/27 (Beach)

  DMZ: 2.2.2.2/27 (Beach)

  distance inside the network:192.168.20.0/24

  My area of encryption should be: 2.2.2.3/32--192.168.20.0/24

  announcement I have a nat rule, which is:

  NAT (inside the dmz) 2.2.2.3 10.5.10.28 netmask 255.255.255.255

  So basically I want to translate the connections coming from 2.2.2.3 to

  10.5.10.28

  the vpn is configured correctly and set up both sides, but the nat rule

  with the vpn doesn't work.

  Built of incoming TCP connections to outside:192.168.20.82/34237 4619

  (192.168.20.82/34237) at dmz:2.2.2.3/22 (2.2.2.3/22)

  but I can t see any traffic on the 10.5.10.28 Server, I see instead:

  Built of incoming TCP connections to outside:192.168.20.82/34237 4619

  ((192.168.20.82/34237) at dmz:10.5.10.28/22(10.5.10.28/22)

  any help would be great!

  Kind regards

  dural

  Dural salvation

  Could you specify just the line

  NAT (inside the dmz) 2.2.2.3 10.5.10.28 netmask 255.255.255.255

  should we read

  2.2.2.3 static (inside the dmz) 10.5.10.28 netmask 255.255.255.255

  Also are you terminating the VPN on the external interface of your firewall is to say what is the IP address of the peer to your end.

  You might not try

  static (inside, outside) 2.2.2.2 10.5.10.28 netmask 255.255.255.255

  * Edit - I meant

  static (inside, outside) 2.2.2.3 10.5.10.28 netmask 255.255.255.255 *.

  You need not actually traffic to DMZ, you?

  If not do you have IP addresses available in the public system on your external interface?

  HTH

  Jon

• Router VPN 3005 and 7500

  Hi all

  Could you someboy help me on that?

  I have a network like this:

  Internet Internet

  | |

  router VPN - 3005

  |

  Internal

  I can set up Lan to Lan VPN 3005 and other PIX aside, but I can't ping internal network with the back of my internal network. I've already put the static route to the subnet of setbacks in the router and my subnet route internal VPN. What should I do? Thanks in advance.

  Banlan

  in fact the 3000 can do a ping will depend on your network-lists / lists access so that my not be a relevant question.

• PIX VPN &amp; Port forwarding

  Hello!

  I installed a version the most recent Pix 6.x and have a few questions. Is it possible to have several ipadresses on the external interface? I want to connect to/from ipadresses different rules. For example, www should point to internal ip of the server. Also a VPN solution should work.

  IP outside the ISP must be aaa.bbb.ccc.82 and get VPN to work.

  I now need to allow outside aaa.bbb.ccc.90 address to accept ISPS Web server. Is it possible to get outside interface to both aaa.bbb.ccc.82 and 90 address answar? If so, I think I can work on a config.

  KR

  Mattias

  Mattias salvation,

  If I am the IP aaa.bbb.ccc.82 is the physical IP address of the PIX and th aaa.bbb.ccc.90 of intellectual property should be an outside IP of a server behind the PIX.

  In this case, you need only create a static entry in the PIX to meet these requests, like this (assuming that the outside and inside of the named interfaces 'outer' and 'inside' and inside the server IP is xx.yy.zz.90):

  static (Inside, Outside) aaa.bbb.ccc.90 xx.yy.zz.90 netmask 255.255.255.255

  Please let me know, otherwise it's the situation.

  Kind regards

  Roland

• PIX 501 PPPoE w / static NAT loss of connectivity

  I have a {should} installation very simple. PIX 501 with PPPoE on the external interface, 3 inside customers using PAT and 1 inside the client I am trying to use an address mapping static on permit communications with this host from the outside using a particular service. I did a lot of these before where there was an ADSL router in front of the PIX, but this is the first where I've used the PIX as the PPPoE client. When I use the static NAT for the single host it loses all connectivity beyond the PIX outside interface. When I get rid of the static mapping, through PAT very well. I spent many hours troubleshooting and control a lot of obvious things, but I am at a loss right now... unless it could be a problem with the IP address that has been assigned by the ISP for use with static NAT. Any thoughts on this would be greatly appreciated.

  Thank you

  Sorry, in your case that static would look like this because of the dynamic IP.

  static (inside, outside) 23 interface 10.1.1.1 23 netmask 255.255.255.255

  Daniel

• VPN Hub and Spoke with NAT

  Hello! I have a VPN network star topology, I need configuration for our customers to access. I have 3 points of endpoint in this example: VPN, Pix 515e and Linksys RV042 hub. The hub is the site of our parent company, the Pix 515e is our data center and the RV042 is at the customer's site. What I currently have is a VPN connection between our Pix 515e and the hub, and another between our Pix 515e and the RV042 VPN. What I need is for the server on the client (RV042) site to talk to the hub network via our Pix 515e. I also need to be coordinated traffic so it looks like it's from the same subnet on our Pix 515e to the hub.

  Hub (MEAN): 10.1.6.x

  PIX 515e (HUB): 172.16.3.x

  RV042 (SPOKEN): 192.168.71.x

  PIX 515e (HUB):

  Outside - 12.34.56.78

  Interior - 172.16.1.1

  Hub (TALK):

  Outside - 87.65.43.21

  Interior - 10.1.6.1

  RV042 (SPOKEN):

  Outside - 150.150.150.150

  Interior - 192.168.71.1

  The hub allows all traffic to my Pix 515e on subnet 172.16.3.x and vice versa. The RV042 allows all traffic from 172.16.3.x to talk to 192.168.71.x and vice versa. I need to get 192.168.71.5 on RV042 network 10.1.6.x the network hub through the Pix 515e and make it look like its 172.16.3.71 entry. So I need NAT traffic in the tunnel to another tunnel. Attached config running under the direction of privacy. Any help is greatly appreciated.

  On PIX you need a static policy statement,

  NAT list allowed access host ip 192.168.71.5 10.1.6.0 255.255.255.0

  public static 172.16.3.71 (external, outside) 192.168.71.5 nat access list

  And modify the ACL of appropriately crypto to include natted address.

• Cisco ASA Site to Site VPN IPSEC and NAT question

  Hi people,

  I have a question about the two Site to Site VPN IPSEC and NAT. basically what I want to achieve is to do the following:

  ASA2 is at HQ and ASA1 is a remote site. I have no problem setting a static static is a Site to IPSEC VPN between sites. Guests residing in 10.1.0.0/16 are able to communicate with hosts in 192.168.1.0/24, but what I want is to configure the NAT with IPSEC VPN for this host to 10.1.0.0/16 will communicate with hosts in 192.168.1.0/24 with translated addresses

  Just an example:

  N2 host (10.1.0.1/16) contacted N1 192.168.1.5 with destination host say 10.23.1.5 No 192.168.1.5 (notice the last byte is the same in the present case,.5)

  The translation still for the rest of the communication (host pings ip destination host 10.23.1.6 N3 N2 not 192.168.1.6 new last byte is the same)

  It sounds a bit confusing to me, but I've seen this type of configuration before when I worked for the supplier of managed services where we have given our customers (Ipsec Site to Site VPN with NAT, don't know how it was setup)

  Basically we contact the customer via site-to-site VPN hosts but their real address were hidden and we used as translated address more high 10.23.1.0/24 instead of (real) 192.168.1.0/24, last byte must be the same.

  Grateful if someone can shed some light on this subject.

  Hello

  OK so went with the old format of NAT configuration

  It seems to me that you could do the following:

  • Configure the ASA1 with static NAT strategy
    • access-list L2LVPN-POLICYNAT allowed ip 192.168.1.0 255.255.255.0 10.1.0.0 255.255.0.0
    • public static 10.23.1.0 (inside, outside) access-list L2LVPN-POLICYNAT
  • Because the above is a static NAT of the policy, this means that the translation will be made only when the destination network is 10.1.0.0/16
  • If you have for example a PAT basic configuration to inside-> external traffic, the above NAT configuration and the custom of the actual configuration of PAT interfere with eachother
  • ASA2 side, you can normally configure NAT0 / NAT Exemption for the 10.1.0.0/16 network
    • Note of the INTERIOR-SHEEP access-list SHEEP L2LVPN
    • the permitted INSIDE SHEEP 10.1.0.0 ip access list 255.255.0.0 10.23.1.0 255.255.255.0
    • NAT (inside) 0-list of access to the INTERIOR-SHEEP
  • You will need to consider that your access-list defining the VPN encrypted L2L traffic must reflect the new NAT network
    • ASA1: allowed to access-list L2LVPN-ENCRYPTIONDOMAIN ip 10.23.1.0 255.255.255.0 10.1.0.0 255.255.0.0
    • ASA2: list L2LVPN-ENCRYPTIONDOMAIN allowed ip 10.1.0.0 access 255.255.0.0 10.23.1.0 255.255.255.0

  I could test this configuration to work tomorrow but I would like to know if it works.

  Please rate if this was helpful

  -Jouni

• 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.