Cisco Switching/Routing :: Public IP On Inside Interface ASA 5512
Aug 23, 2012
How would I go about giving a server on the inside interface of my ASA a public IP address. I have a /28 on the outside interface and I'd like to give a server a public IP and not NAT.
I'd not sure how to go about getting this done.
show run nat=
nat (inside,outside) source static any any destination static NETWORK_OBJ_192.168.0.192_27 NETWORK_OBJ_192.168.0.192_27 no-proxy-arp route-lookup
nat (inside,outside) source static NETWORK_OBJ_192.168.0.0_24 NETWORK_OBJ_192.168.0.0_24 destination static NETWORK_OBJ_192.168.0.192_27 NETWORK_OBJ_192.168.0.192_27 no-proxy-arp route-lookup(code)
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Jun 7, 2013
I have a Cisco 5512 x Firewall connected with Cisco Layer 3 switch 3750.I have two different WAN connections, one for Data and one for voice. Cisco Layer 3 switch is configured with 2 different VLAN's one for data & other is Voice Vlan. Switch is providing DHCP to computers and IP phones. Voice Pool 192.168.10.0/24 Vlan10 and Data pool 192.168.20.0/24 Vlan20.I need to route my data & voice traffic separately. Cisco ASA is connected with two different ISP's. So, how can I do this configuration so that Voice and Data traffic will route separately.
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May 1, 2012
I have a Cisco ASA 5505 and I have my internal and external interfaces configured but I currently cannot ping from the inside to an IP Address on the outside. I had this setup and working and I have another set of equirement that I am replacing that is working with my service provider so I know it is a configuration issue. When I ping 4.2.2.2 for example I get:
Destination host unreachable
Do I need to add a static route from my inside interface to my outside interfaces?
: Saved
:
ASA Version 8.2(5)
!
hostname pxasa
[Code].....
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Oct 30, 2012
Got an ASA5525-X with 8.6 release. We have an inside interface (10.11.1.0/24) and a DMZ interface (10.254.1.0/24). On that DMZ interface theres an SMTP server; by using the Public server feature in ASDM we created a rule so we have mapped the 10.254.1.29 internal ip to an external ip 217.x.x.x Everything is fine; working ok, but for several reasons we need to access the public ip 217.x.x.x from an inside ip (10.11.1.10). I tried to do it by creating an exemption for the dynamic nat; if i don't do that i have a 'deny ip spoof from...' message rolling on my syslogs.Seems to do the trick.....but only for pings! i ping the public ip from the inside ip, and got the reply from the internal ip on the DMZ. But if i want to telnet port 25 from inside to public; its not working.
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Jul 24, 2012
I have a 2621 that I am configuring on the internet. My ISP gives me a static DHCP assigned address and then two more static addresses that are not part of the same block. (e.g. 1.2.3.4 is static via dhcp and then they give me 5.6.7.8/30).
I have fa0/0 getting 1.2.3.4 ia dhcp. I have 5.6.7.8 on a loopback interface for PAT/NAT as I have the main one on fa0/0 doing vpn to a remote ASA. The problem is that I have yet another device that needs a public IP, mainly 5.6.7.9... I want to hook that device up to fa0/2 (this box has three fa interfaces). How do I setup fa0/2 if I want to give the device on it a real live public IP address? I have done this before, but it must have been 10 years back on an even older CISCO and I can not remember how I did it.
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Jan 21, 2013
Platform:
cisco6509-E with FWSM
Supervisor Engine 32 PISA 8GE
sup-bootdisk:s32p3-adventerprisek9_wan-mz.122-18.ZY2.bin
command:
(config)#ip nat inside source static tcp 10.10.8.147 14029 interface g7/8 14029
(config)#no ip nat inside source static tcp 10.10.8.147 14029 interface g7/8 14029
#clear ip nat tran *
(config)#ip nat inside source static tcp 10.10.8.147 14029 interface g7/8 14029
%Port 14029 is being used by system
Or %Static entry in use, cannot change
But when I perform "sh ip nat tran" command,There is nothing
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Feb 18, 2013
I'm having an issue setting a static NAT
We have a block of 5 public ip's
66.x.x.34-38
IP 66.x.x.38 is assigned to the outside interface. I can set static nats to all the other ip's and they work fine yet a static NAT using the same address as the outside interface does nothing.
I've used
object network centralpark-http
host 192.168.1.227
nat (inside,outside) static interface service tcp http http
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Mar 4, 2011
Is it possible to establish PBR rules that set the ip next-hop to point directly to the inside interface of the ASA5550?Or, do I need to direct this PBR traffic first to a directly connected router interface and then default route to the ASA?At a high level, here's what we have:
ISP 1 - with /21 IP PrefixNo BGP Routing3845 Edge Router - Default Route to ISP 1PIX535 Firewalls (HA) - Default Route to Edge RouterLAN Core/Distribution - Default Route to PIX535 Inside InterfaceAll applications/services use this egress path for PAT/NAT/DMZ/VPN/Etc.
Here's what we are adding:
ISP 2 - with /24 IP PrefixNo BGP Routing3925E Edge Router - Default Route to ISP 2ASA5550 Firewalls (HA) - Default Route to Edge RouterSame connectivity to LAN Core/Distribution
Goals:Maintain ISP 1 for nowMigrate only end user Internet traffic to ISP 2No disruptions to applications/services using current DefGW to PIX535
Question: how to best use PBR to selectively direct traffic to the ASA inside interface?
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Oct 9, 2011
I have Pix 501 firewall and I'm just configuring the device for "Email Server" to allowing POP/SMTP.
Inside Interface Address: 132.147.162.14/255.255.0.0
Outside Interface Address: ISP provided IP address
My question is can my traffic goes from inside interface to outside interface? (because the inside interface address not from 10.0/172./192.168 private address)Also I'm allowing internet from this email server (132.147.162.14) so what my access list to be configured? and what my subnet mask shoud be there?
Pix(config)#access-list outbound permit tcp 132.147.162.14 255.255.0.0 any eq 80
Pix(config)#access-list outbound permit udp 132.147.162.14 255.255.0.0 any eq 53
Pix(config)#access-group outbound in interface inside
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May 18, 2011
I'm trying to traverse from my inside private IP address (10.x.x.x) to my public IP address translation (172.16.x.x) in order to take advantage of the ACLs that are already applied on my outside interface. For example:
Host 10.0.0.1, translated to PAT pool
Server 10.0.0.5, translated to 172.16.0.1
Inside-out access-list permits ip any any
Outside-in access-list permits tcp any 172.16.0.1/32 eq 80
From my inside host, I can get go 10.0.0.5:80. I can get out to the internet. External hosts can successfully get to 172.16.0.1:80 (address scheme is theoretical). I can do everything except for connect to 172.16.0.1:80 (the translated public IP address) from my inside host address. I did not setup this firewall originally, but I can't see a blatant command that makes this not work. I don't see an ACL rule matched, so I'm assuming this is an issue with NAT or some sort of security policy. I'm running a Pix 535 /w 8.0.4. The response I got from Cisco was "create static (inside,inside) translations for every host", but that's over 300 hosts. I have a friend running the same software set and his works as expected without these static (inside, inside) NATs.
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Jul 5, 2011
The router is 2821 and is setup to perform static NAT from one internal ip address mapping to one external ip address for each of our servers (inside the LAN): [code] Servers all have internal ip addresses and each of them represented to the outside world by their public ip address with above command on the router. Here is the problem.When I'm in a server (for example 192.168.0.210) and try to access other servers by their public ip addresses (i..e. *.*.*.211) the connection fails. However, When i try to access the same server by it's private IP address (i.e. 192.168.0.211) it works!
My issue is i don't want to modify windows host file for a manual mapping (for example mail.mydomian.com goes to 192.168.0.211 rather than *.*.*.211) because we host many domains and just doesn't make sense to do it one by one.So we must be able to access our servers by their public IP addresses in order for us our applications works correctly.
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May 22, 2012
I need to connect from an inside host to a host located in the DMZ zone for DNS queries. The host in the DMZ zone has a static NAT to the outside. The point now is that I would like to connect from inside to the NATed outside address, means to the public Internet address.
Inside host: 10.0.0.1 -> PAT for 10.0.0.0/8 to 20.0.0.254 (Outside Interface)
DMZ host: 192.168.1.1 -> NAT to outside to 20.0.0.1
The traffic should be 10.0.0.1 udp>1024 to 20.0.0.1 udp=53. The source IP address on the outside interface now is 20.0.0.254 (according to the PAT), the destination IP address 20.0.0.1. The DNS reply from 20.0.0.1 should go back now to 20.0.0.254 and then to the inside host 10.0.0.1.
I know that on the PIX it was not possible, to have outgoing traffic on the outside interface which immediately enters again the same interface. Can I realize this scenario with the ASA 8.4(3) release now?
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Apr 2, 2013
I have a client that just got a second public IP (x.x.x.252) for a new program. I've setup that second IP on their UC540 on the public-facing port and it's accessible all day long from the outside, no problem. The problem comes in where users from within the LAN can't see the new public IP at all; however, they CAN get to the original public IP x.x.x.250. I've looked at the rules every which way and can't see anything that either 1) only allows LAN traffic to get to the original public IP, or 2) a NAT rule that only allows the same thing.
[Disclaimer: I just inherited this client and their setup, so other than me adding the IP and opening ports to it, I didn't program it.]
Here is the port configuration:
!
interface FastEthernet0/0
description $FW_OUTSIDE$
ip address 63.234.195.252 255.255.255.248 secondary
ip address 63.234.195.250 255.255.255.248
ip access-group 106 in
no ip redirects
no ip (code )
I can't figure out why .250 is internally-accessible, but .252 isn't. .252 is in the routing table as a directly-connected address, but I also added ip route 63.234.195.252 255.255.255.255 FastEthernet0/0 to the routing table and it still won't go. Everything is controlled by the UC540: The internal servers do not run DNS or DHCP or even a domain. There are no NAT outside rules.
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Sep 11, 2012
I hava ASA5510. INSIDE,DMZ and OUTSIDE interfaces are configured. I hava web server on DMZ ip:10.0.0.1 and it is static natted to 1.1.1.1. From internet i can reach to web server with IP:1.1.1.1 and from INSIDE connect to web server with IP:10.0.0.1. Now i want to connect from INSIDE to WEB server via public IP(1.1.1.1).how can configure it?
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Jun 22, 2011
I'm stuck at asa 5505 nat, port forwarding configuration Here is what i need:
host1: 192.168.1.1 service tcp/100 >>>>> public ip 1.1.1.1 service tcp/100
host2: 192.168.1.2 service tcp/200 >>>>> public ip 1.1.1.1 service tcp/200
host3: 192.168.1.3 service tcp/300 >>>>> public ip 1.1.1.1 service tcp/300
So people from remote just need to use 1.1.1.1 public ip to access all the ports on three different inside server.I can do this on my old ASA 5505 with 8.0(4). Looks like there're lots of change from 8.0 to 8.4.
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Nov 27, 2012
On an 887VA running 15.x IOS, is there a way to support both public and private addresses on inside vlans? The outside interface is public static ip, so the requirement would be to not nat anything if coming from inside vlan10 but nat if coming from inside vlan20.I didn't think this was possible since the outside interface would have to use an outside nat command that would not be ignored for traffic coming from vlan10.
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Jan 23, 2012
We have ASA 5550, I have a portal server in the dmz which is natted statically to a public ip address for port 443. The application works fine from outside world. The server is also nated with a dynamic nat from inside to dmz and when I hit on the dmz ip from my inside it works fine.
The requirement for us is that the users sitting behind the inside (i.e. LAN) should access the server on the public ip address and not thru the dmz.
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Jan 16, 2013
How to route my internet traffice through the same interface where I have my site to site vpn configuried on.1) I'm using a ASA 5512 2) configuried a site to site VPN on g0/0 interface ( leased line with internet connect to the FW) 3) have a global IP assinged to the g0/0 ( site to site vpn established between two countries using global IP address at both ends ) ,4) security level 0 for g0/0 , LAN users inside( g0/1) security level 100 ,What i want to know is, how can i configure my LAN users to access internet via the g0/0 interface using the same global ip address assigned to it. not to route the internet through VPN,but i want to route it to my local ISP.
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Nov 7, 2012
I have an ASA 5510, with Ethernet0 connected to Internet via a T1 line, Ethernet1 connected to LAN1, and Ethernet2 connected to LAN2. LAN1 & LAN2 are independant, but share the Internet connection, via the T1 line. On LAN2, I have another router that connects to the Internet, via a Comcast line. I wish to route some of the traffic on LAN2 (10.38.77.0) to the other Router, on LAN2 (10.38.77.12) (connected to the Comcast line). I have entered the following lines:
route inside2 10.11.0.0 255.255.0.0 10.38.77.12 1
route inside2 10.252.0.0 255.255.0.0 10.38.77.12 1
route inside2 172.22.6.0 255.255.255.0 10.38.77.12 1
I can trace the routes from the ASA 5510 (1st hop is to 10.38.77.12), but not from anything else on LAN2.
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Dec 8, 2011
I have a quick query which i need ratified before proceeding. I have the following scenario -
Two Cisco 3750v2 switches with stackwiseISP allocated block of /26 (64 addresses)8 customers each with a VLAN and SVIInternet facing VLAN and SVIDefault route to ISP router Lets say the ISP has given me the network range 10.10.10.0/26 (we'll assume this is routable on the internet for the purposes of this example) and a default gateway to the internet of 10.10.10.1 within this range. I have configured a public facing VLAN as follows -
VLAN 300
name PUBLIC
int VLAN 300
IP Address 10.10.10.2 255.255.255.252
I have then created a default route as follows -
ip route 0.0.0.0 0.0.0.0 10.10.10.1
With this configured, the switch can successfully route upstream to the internet with no problems. I have then moved onto the customers and depending on what service they have purchased, I have subnetted the 10.10.10.0/26 range into smaller subnets. See as follows -
Customer A - 10.10.10.4/30
Gateway IP - 10.10.10.5
Useable IPs - 10.10.10.6
Customer B - 10.10.10.8/29
Gateway IP - 10.10.10.9
Useable IPs - 10.10.10.10 - 10.10.10.14
This continues for each customer depending on how many IP's the have purchased. I have then assigned these IP ranges to a customer VLAN and SVI as follows -
Customer A
VLAN 10
name CUST-A-VLAN
int VLAN 10
ip address 10.10.10.5 255.255.255.252
[code].....
It is then up to the customer as to what equipment they use and how they NAT or firewall their internal networks.
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Jun 7, 2012
I have a Cisco 2821 Router. Its ethernet Interface(E1) is connected to an ISP's Gateway.The outside interface IP is 207.x.x.1, The ISP has given 6 public IPs (202.x.x.1- 202.x.x.6) to use in LAN.
I have configured the router`s Internal Interface(E0) with a public IP address. (i.e. 202.x.x.1)
My Internal LAN PCs are in a private range of 192.168.1.0/24 subnet. Now I wanted my PC users to access the Internet while the Routers public IP remains on internal interface. How can I do the same?
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Sep 25, 2011
I have a PIX-525 with an UR license. I was trying to get my VPN to work from my iphone over the weekend but to no avail. I then changed the interface to the inside to see if my iMac could connect and bingo! It worked. I then tried to connect via inside interface with my iphone and it worked.
I connected a PIX-515e and, using the same settings, can connect to the outside interface via my iPhone.
Now, to answer the pressing questions, yes I changed the server IP address in my IPSEC client settings to reflect the outside and inside interfaces as I was testing each one. I was using a preshared secret. Yes, the secret was entered correctly and they all matched...yes, the tunnel name was entered correctly. I was using local user database for authentication with username/password (i.e. no certificate authorization to make things simpler for debugging). I changed the syslog to debugging and I see absolutely no errors when trying to connect my iphone to the outside interface (i.e. turning wifi off so I'm on my 3G data network). The only thing I see is where my iphone hits the outside interface and it does a teardown (or whatever its called) but that's it.
Why would this work like a charm with my PIX-515e and not my PIX-525? Could the VPN accelerator card in the 525 be at fault? The 515e does not have the aecellerator card. why I can esablish a VPN connection on the inside interface but not the outside?
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Jul 30, 2012
We have two sites: 192.168.100.x and 192.168.101.x currently connected via IPsec VPN. On each end we have a Cisco ASA 5505. However, each site also has an MPLS VPN with intentions to move all traffic to this link. Will this work on the ASA? We need to make sure traffic can hit the ASA @ site A on the inside interface and trafiic will forward to the MPLS VPN router which then handles the traffic. Too, will it cause any problems in bi-directional flow between the two sites?
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Jul 8, 2011
I currently have an out of the box ASA5505 and need to change the internal interfact from 192.168.1.1 to 10.20.3.1 so it fits in with the rest of the network.Tried using the ASDM Startup wizard (via 192.168.1.1) and it just seems to hang on "delivering the commands to the device".
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Jan 17, 2013
I am trying to upgrade a Cisco ASA over an IPSEC VPN tunnel. My FTP server is on the remote side of the VPN tunnel but I am initiating connections from the inside interface of the firewall. I am currently managing the Firewall over the VPN via it's inside interface (using the management-access inside) command. When I try and update via FTP, the connection is going straight out the outside interface (and not across the VPN tunnel) I have tried upgrading via TFTP but it keeps stopping randomly with (unspecified error) I normally upgrade via FTP though but it's not working in this instance. Essentially what I am asking, is is there an equivalent command for FTP that there is for TFTP: tftp-server interface ip anyconnect I need the connections to originate from the inside interface so they traverse the VPN. I am running 7.2.3?
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Sep 19, 2012
I have recently installed an ASA5510 at a site in South Africa to connect via VPN to a site in the UK (ASA5520). The VPN comes up fine with the 5520 in the UK, however, I can not connect to the inside interface over the VPN, but can access it from the internal LAN. All other hosts on the LAN are accessible over the VPN.
The 5510 also has another VPN to another site in SA and the 2nd site cannot ping the interface either.
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Aug 18, 2011
We currently have a setup where users connect to the inside of a firewall using the ipsec client. We are moving them to the anyconnect client but are unable to get it to work, we cannot even get a webvpn page on the inside.
When trying to connect with anyconnect the ASA reports an IKE initiator fail on the inside. and no tcp connection flag. We cannot get any response with Webvpn either I have tried using a different tcp port on webvpn but then the asa denies the traffic even though there are no rules denying.
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Oct 2, 2012
I'm trying to translate my inside network of 192.168.20.0 to my outside ISP address on ASA 5505. The ping from all hosts to 4.2.2.2 works, but it still only let's one address out to translate.My configuration is:
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
still doesn't work.
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Oct 2, 2012
I'm trying to translate my inside network of 192.168.20.0 to my outside ISP address on ASA 5505. The ping from all hosts to 4.2.2.2 works, but it still only let's one address out to translate.My configuration is:
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
still doesn't work.
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Mar 14, 2012
I've got a 1U server that has Citrix XenServer 5.6 installed on it. It has 2 physical ethernet interfaces, both connected to the same network switch, one interface has a public IP address on it and the 2nd interface has a private rfc1918 address on it (this can be changed if necessary). I use the private1918 interface to do administrative tasks, transfer data amongst the servers and guest VMs, etc. I'm given a /29 IP address allocation by a friend to use for my servers (using his FTTP internet connection). I want to set up a few guest VMs, but really most of them do not need to be using public IP addresses.
Is there a way to NAT the public interface on XenServer so that guest VMs can use rfc1918 addresses & get online, instead of using the few IP addresses I am given? Also how would I enable portforwards so that I can get applications to work like asterisk, SMTP, etc.?
Listing of interfaces on the Xenserver:
Code...
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May 10, 2011
I have a new ASA 5505 and all is working fine, I can CLI and ASDM into it, but just can't ping the inside interface, do I need to enable a feature to make this work somehow?
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Apr 23, 2012
I am connecting the inside interface to an upstream switch and therefore will need to assign a static IP address to the inside address as I did below:
#sho int ip brief
Vlan1 123.123.123.123 YES manual up up
I will also use this to manage the ASA. I am having a problem with the network configuration of the inside interface as I can't ping the gateway and/or the in IP of the inside interface.Do I need to add any routes?
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Nov 12, 2012
We have a 5510 and I have a second ISP setup for a backup link. We have 4 ports connected to 4 different internal subnets. I want to force one of the ports to use the backup ISP link at all times. I'm having a little problem with where I need to make the changes in my ASA.
Interface "outside" is my main ISP
Interface "building3" is my backup ISP.
I want to force the "Guest" network to use the "building3" link for all traffic. Here's a snippet of my config
global (outside) 10 interface
global (building3) 10 interface
nat (inside) 0 access-list nonat
nat (inside) 10 0.0.0.0 0.0.0.0
nat (Guest) 10 0.0.0.0 0.0.0.0
[URL]
Do I need to change the global pool or create a new one? I have a couple free public IP addresess on the building3 subnet I can use for a pool.
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