Cisco VPN :: PAT Outbound On 5540 For Traffic?
Feb 28, 2011
We're running 8.3(2) in the ASA5540. Users all over our enterprise connect to a business partner's application through the ASA/VPN. We have a class-b address space, and since the users are spread out all over the place, I have the entire class-b space as the local object in the ACL that allows traffic through the VPN tunnel.
The business partner has concerns that our entire address space is available to access the VPN tunnel. So I thought, to alleviate their concerns, to PAT all of our connections outbound to a single IP address.
How is this done in 8.3(2)? We use ASDM to configure the 5540. For example, say our class-b is 159.12.0.0 and the PAT'd IP address will be 199.30.36.6.
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Dec 6, 2012
I have two ISP, I want to divide Inbound to ISP1 and Outbound to ISP2.
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Oct 14, 2012
I have a LAN with several linux boxes (Fedora 17, both 32 and 64 bits), as well a a WInXP box. All of these are connected to the same switch, which is connected to the inside port of my PIX 515.
For a few sites (mozilla.org happens to be one of them), for http access, the tcp connection is established, but the "GET" request - or anything else for that matter - will not go through the PIX (from inside to wan). I have verified this by first, using wireshark to watch the packets being sent out from the client box, then by using the trace function in the PIX to see that the packets ARE arriving at the inside interface, but ARE NOT sent out of the wan interface.
This is for the linux boxes ONLY. When I do the same thing with my WinXP box, all works: in the PIX trace, I see the packets arrive at the inside interface, and leave the wan interace. And access to these sites are okay.
(What's a bit weird, although somewhat expected, when I connect my android phone to my LAN via WiFi, it too is unable to reach those sites - but then again, android is linux, right?)
In addition to the tracing, I have narrowed this problem down by connecting a linux box directly to my DSL router, then replacing the PIX with a simple router/gateway. Both of those solutions work.
Some background:
I have been using this PIX for about 10 years now, with the same configuration (except IP addresses). Only in the last several months has this problem started to show up.
I got this pix from a dead company at a really great price (free), so I'd like to keep it, and not have to spend money on something else. I don't have any support license, and have not been able to get any software upgrades. Here is its version info:
taz(config)# sho ver
Cisco PIX Firewall Version 6.2(2)
Cisco PIX Device Manager Version 2.0(2)
Compiled on Fri 07-Jun-02 17:49 by (code)
Serial Number: 405200362 (0x1826ddea)
Running Activation Key: 0x38ac31f3 0x0630df47 0x9a77b805 0x8bc39a60
PS: Since this PIX is at its end of life, I was wondering if any of the software upgrades would be now available without a license?
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Apr 4, 2013
We've got a proyect that requires a few thin clients to connect to a remote PCoIP server.
Looking to the documentation, the only port required to be open through Firewalls is TCP/UDP 4172, however, we've seen (making interface captures) that it somehow also uses ESP (IP protocol 50).
We've got a static NAT translation translating those thin clients to a public IP address, we've created ACLs to allow inbound (shouldn't be necessary as our user is connecting to a remote server) and outbound traffic for TCP/UDP 4172 and ESP and I cannot make it work.
I've also enabled IPSec pass-through Inspection to no avail.
how should we configure our ASA to enable this kind of traffic?
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Feb 29, 2012
I have hooked up to the Cisco 2821 router a T1 on Serial and Cable Modem to GigEth0/1 and I want to split outbound traffic so that all regular users will use G0/1 interface for web traffic and the rest of the traffic stays with the T1. I am having an issue where the users on the network are not able to use the internet when using the following config:
!
interface GigabitEthernet0/0.10
description Data
encapsulation dot1Q 50
[Code].....
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Mar 10, 2011
I've had a Cisco ASA 5505 firewall connected to a cable modem (Virgin Media, UK) for the past 3 years. In the last 6 months or so I have noticed that the ASA would drop the outside (internet) connection intermittently, usually at least once every 1-2 weeks - the interface still shows as being up but no traffic crosses it, and computers on the inside network abruptly lose internet connectivity. Rebooting the ASA or administratively shutting down the interface and bringing it back up again would cure the problem straight away until the next time it happens.
In the last couple of days however despite nothing having been changed in the configuration the frequency of this connection drop has increased to the point where I would lose access to the internet within an hour of rebooting the ASA. It does not seem to matter whether or not there is traffic currently going out or not, inside computers just appear to suddenly lose internet connectivity.
I have tried the following without success:
1) I completely wiped the configuration (configure factory-default)
2) I changed the port the cable modem was connected to (eth0/0 -> eth0/7, changing switchport vlan accordingly)
I thought perhaps 2) had fixed it but it lasted a whole 2 hours before I woke up this morning to find that none of the internal equipment had internet access despite the fact eth0/7 was showing as up/up in ASA CLI.
This morning I manually set the eth0/7 port to "speed 10" (10Mbps, full duplex). It was previously set to be auto-negotiation (default) on both speed and duplex. As of this post it has managed to keep the outside connection up for 3 hours - but I'm not optimistic that it is fixed.
Interface counters have never shown any collisions, errors, etc - only packets input and output as expected.
Since the problem persisted across ports (eth0/0 -> eth0/7) I'm wondering whether or not the problem could either be faulty memory, or some kind of speed/duplex incompatibility between the cable modem and ASA.
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Apr 14, 2013
Cisco 2811 runs ITP IOS. On that router we run the SMPP service. A client on the network connects to this service, and we need to capture the traffic for debug.
I've tried traffic-export, but I cannot see any outbound traffic. Is there any way to capture the outbound traffic?
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Aug 21, 2011
A recently added outbound rule has left my SMTP communications broken. I have since removed the rule, and had Cisco do some damage control, but it's still dropping some of the SMTP traffic. I get a number of NDR messages each day like the one below:Your message did not reach some or all of the intended recipients. Subject: RE: Christopher, Curt Sent: 8/19/2011 9:38 AM The following recipient(s) could not be reached:
[URL]
on 8/21/2011 9:49 AM
Could not deliver the message in the time limit specified. Please retry or contact your administrator.
<630.SM.Local #4.4.7>
Your message did not reach some or all of the intended recipients. Subject: RE: Christopher Curd Sent: 8/19/2011 9:38 AM The following recipient(s) could not be reached: JWillar@email.com on 8/21/2011 9:49 AM Could not deliver the message in the time limit specified. Please retry or contact your administrator. <630.SM.Local #4.4.7>
I've attached an image of my configuration (ASDM GUI). The part of the image highlighted in green are the SMTP rules. The part highlighted in yellow is another rule that I added about a month ago to block a SYN attack. This rule may be part of the problem because of the order it is in the list. Not sure, though.
I have had two Cisco techs Putty into my ASA to check things out. I think they've done all they can. I wonder at this point if it be wise to just reload the last good running-config I have prior to the Outbound rule being added.
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Nov 26, 2012
I am attempting to block outbound traffic for a specific PC on my LAN using the ASDM.
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Mar 26, 2013
We have some ASR WAN routers which have a dedicated 400M interface to a remote site.
Servers on our Local network source the data through some firewalls via 10G interfaces, which connects to 4500X WAN switches then to the Routers on 1G links.
The sources are rate limiting the traffic but the routers are periodically dropping packets which I think is mostly due to burstiness in the traffic between as it traverses through from 10G links to 1G then to 400M.
How to setup traffic shaping on the 4500X outbound port to our WAN routers.I'd like to see if we could buffer and smoothe out the traffic as it exits the 4500X WAN switch 1G port to the WAN Routers.
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Oct 23, 2012
I am trying to block outbound and inbound traffic on TCP 5222 and 5223 on E2500 but cannot figure out how. The reason is I have kids in my house using KiK (texting app) on iPads, iPods etc. My goal is to eliminate this applications ability to function for ANY wireless device connected to my WLAN.
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Aug 21, 2011
I just made a move from a PIX 506 to an ASA 5540. I have a user that currently logs into a web portal and runs a job. It is now erroring out. When I run the test it gives me the following message:
Testing ports...
Port 1433: Failed
Port 1150: Success
Port 80: Success
Port 443: Success
One or more tests have failed
The computer we access this site from is on the inside network and the ACL says permit ip any any from the inside out so I am not sure why it is failing. Under the ASA Home screen I see the Top 10 Protected Servers under SYN Attack and it appears that the ASA thinks this is some sort of attack.
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May 31, 2012
This has to be the most weirdest issue I have seen since the past year on my ASA. I have an ASA 5540 running the 8.4(2) code without any issues until I stumbled upon this problem last week and I have spent sleepless nights with no resolution! So, take a deep breath and here is a brief description of my setup and the problem:
A Simple IPSEC tunnel between my ASA 5540 8.4(2) and a Juniper SSG 140 screen OS 6.3.0r9.0(route based VPN)
The tunnel comes up without any issues but the ASA refuses to encrypt the traffic but decrypts it with GLORY! below are some debug outputs, show outputs and a packet tracer output which also has an explanation of my WEIRD NAT issue:
My setup - ( I wont get into the tunnel encryption details as my tunnel negotiations are **** perfect and comes up right off the bat when the ASA is configured as answer only)
CISCO ASA - IPSec networking details
LOCAL NETWORK - 10.2.4.0/28
REMOTE NETWORK - 192.168.171.8/32
JUNIPER SSG 140 - IPSec networking details
PROXY ID: LOCAL NETWORK - 192.168.171.8/32
REMOTE NETWORK - 10.2.4.0/28
HOST NAME# sh cry ipsec sa peer <JUNIPER SSG PEER>
peer address: <JUNIPER SSG PEER>
[code]...
As you can see, there is no echo reply packet at all as the packet is not being encapsulated while it is being sent back. I have been going mad with this. Also, this is a live production multi tenant firewall with no issues at all apart from this ****** ip sec tunnel to a juniper!!
Also, the 192.168.10.0/24 is another IP Sec tunnel remote network to this 10.2.4.0/28 network and this IP SEC tunnel has a similar Juniper SSG 140 screen os 6.3.0r9.0 at the remote end and this woks like a charm without any issues, but the 171 is not being encrypted by the ASA at all.
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May 27, 2013
I've got an 887M router which will be configured with two linke - one ADSL, one 3G - both of which will have (obviously) a separately suppplied IP address from the different ISP's being used. The 3G is a backup - plain and simple - for use only when the DSL service flakes out (which it does often)
Routing is pretty simple - I'll either do soemthing with a bit of PBR, or a simple weighted static, but the NAT has me scratching my head a little.
Can I have two outbound NAT pools (ip nat outside) for each interface which will be used ONLY for traffic going out the interface concerned?
For example, I have one for the primary link
ip nat inside source list 2 interface Dialer1 overload
Can I do the same for the second dialer interface like this
ip nat inside source list 2 interface Dialer2 overload
and have them automatically switch to using the dialer 2 IP for the outbound NAT if the dialer 1 link fails?
I don't think I've ever come across this before, so I'm not sure if it can even be done.
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Aug 10, 2011
For about the past 2 or 3 months, I have been experiencing outbound packet loss at about the same time every evening. That timeframe is about 7 PM - 10 PM. This is most noticeable on Teamspeak 3 because of the voice disruption that other users report to me.
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Oct 21, 2011
Both of these ISDNs are up, this gives us 4 channels. Someone said they recieved a busy tone when they attempted to dial out. I looked over the system and seen there are two outbound pots dial-peers. Each dial-peer references one of the BRI ports. The preferences are the same on each dial-peer. I think what is happening is that the system is randomly selecting one of the dial-peers due to the preference, even if both channels of the BRI are in use. How does the system know if that port has both channels in use? I've not used ISDN before, so tried to enter the B-channel sub interface and the system (UC500) tells me I cannot do this. I was thinking about adding each channel into a trunk group and then referencing the trunk group in the dial-peer. I can obviously add both BRI's into one trunk group.
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Jan 9, 2012
I just migrated our office network router to a RV082. While configuring it, I came across three problems:
(1) From our ISP we have four public IP addresses which I want to make use of for outbound traffic. With the previous router we used we could configure LAN IPs(ranges) to map to static public IPs. Does RV082 support this? I could not find an option for that at the web-interface. From what I understand the 1-1 NATing only goes both incoming and outgoign ways and actually is 1-1 and not the many-to-one I am looking for.
(2) How is it possible to configure incoming port forwards to use a specific WAN interface? Will it always be the primary WAN interface?
(3) Does the telnet access provide more configuration options? I could not log in to it with the same user credentials as with the web-interface.
Serial Number : NKS1532xxxxFirmware Version : v4.0.4.02-tm (Jul 4 2011 13:30:56)PID VID : RV082 V03Firmware MD5 Checksum : 1f84d8d0a2a8b99f9bfa4409e64547aaLANWorking Mode : Gateway
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Sep 20, 2012
I multi homed to dual ISPs using a single 6509e. Currently, I am only receiving a default from wash ISP and marking one with a higher local pref. most of my traffic flow is inbound, so this config meets my need. The issue I have: if either ISP has has an outage upstream from my directly connected peer, my router does not detect that and continues to send traffic out thru that provider only to be black holed. My 6509 will only support 256k routes, so full route tables isn't an option. I could receive partials from each ISP. Is there any other method to detecting this upstream ISP issue and then adjusting my local pref on my default to use the alternate provider path?
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Mar 31, 2011
I have a Cisco 877 on an ADSL connection. QoS isn't doing the trick -- I need to reserve 200 meg or so of my outbound (upstream) bandwidth for VoIP to end complaints about voice quality. Any example of how to classify SIP, RTP, IAX, and Skype traffic and put a rate limit on anything that doesn't fall into that category? The VoIP phones also are in their own IP range on the LAN side if that would make things easier...or I could even connect them into a specific port on the internal switch in the router.
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Mar 4, 2013
I multi homed to dual ISPs using a single 6509e. Currently, I am only receiving a default from wash ISP and marking one with a higher local pref. most of my traffic flow is inbound, so this config meets my need. The issue I have: if either ISP has has an outage upstream from my directly connected peer, my router does not detect that and continues to send traffic out thru that provider only to be black holed. My 6509 will only support 256k routes, so full route tables isn't an option. I could receive partials from each ISP. Is there any other method to detecting this upstream ISP issue and then adjusting my local pref on my default to use the alternate provider path?
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Jan 12, 2011
I need to attach a QOS policy to a layer 2 WAN interface between two sites. This is actually an extended LAN circuit with 500Mb/s of allocated bandwidth. The interfaces are Gigabit so I want to make sure I don't attempt to transmit traffic faster than 500Mb/s. What is the best way to implement an outbound QOS policy that sets the minimum and maximum speed to be the same? This policy will be implemented on a 4900M with the 20 port GigE module
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Apr 10, 2013
How can I filter outbound sys log messages, so they include only configuration changes messages..
On Cisco 2900 I used:
logging discriminator CFG LOG msg- body includes "PARSER" | "CONFIG"
logging host x.x.x.x discriminator CFG LOG
logging x.x.x.x
How can I do the same on 4507? This feature on Cisco routers is called "Reliable Delivery and Filtering for Sys log" and is available for 12.4(11)T and 12.2(33)SRB (7600) . I am running Version 12.2(25)EWA6 on my Catalyst, so it is not available.
The software I am using is a simple solar winds sys log server.
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Oct 5, 2011
I'm having some issues getting ActiveFTP to pass through an ASA 5505, I finally found out when I tested the FTP via cmd on windows(after the major hassle of getting credentials out of the software co) that it does open the connection on the control port, but whenever I try to send/recieve data the connection is dropped, for troubleshooting purposes I've even gone as far as opening up all ports 1-65535 with an acl to no avail, I believe the FTP traffic is encrypted with SSL(can't get a solid Y/N from the company).
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Mar 30, 2011
Below is the interesting part of my config. I have static NAT configured and working inbound for the Exchange Server and the Barracuda, however outbound traffic from those hosts comes out as the interface IP. Thoughts? I've tried a number of things (outside, inside), etc.
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network DSN-EXCH01
host 10.250.231.51
object network MAIL-IN
host 10.250.231.50(code)
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Jan 30, 2012
I know I can use the RTR statement to determine when the primary ISP circuit goes down via this technote: url...My question can I assign static Nats on the backup ISP connection to the same inside servers in the dmz.?Example 10.1.1.11 is mapped to ISP1 ExternaIP of 65.217.77.11. Can it 10.1.1.11 also be mapped to ISP2's 208.217.77.11?This way I can get my DNS changed and my inbound traffic to servers in my DMZ on the asa 5510 running 8.0.3 code can continue to receive Inbound traffic.
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May 7, 2012
How can I achieve this. I am obviously a novice cisco user and really fight my way around. I just want to grant access to a vendor to connect to his vpn. What ports need opened and what else do I need to do?
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Sep 18, 2011
I've tried a few different ways unsuccessfully so thought I'd ask here.I'm trying to forward an outgoing port on a Cisco 800 series router. ie. When a user inside the network connects to the router on port 1234, it opens up the same port on a server on the Internet.
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Aug 1, 2012
How to set the default outbound policy as block in access rules of rv220w? I configure my company router RV220W to block all outbound service traffic, just allow outbound service as : http, https, smtp, dns_tcp / udp. it works fine for some hours, the next day, the rules like expired, the https / smtp / DNS service fail to outgoing, only the http is still ok? What happen? Now I just set the default outbound policy as allow, all traffic can go out, but that is meaningless for a firewall device.
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Jan 30, 2013
I'm trying to configure a simple ACL to block smtp traffic from leaving my LAN -- basically prevent internal users from setting up internet email accounts in their email clients and sending through that smtp server. i want my Exchange server only to send smtp traffic. here's what i have:
-access-list 102 extended permit tcp host 10.10.1.29 eq smtp any eq smtp <===10.10.1.29 is Exchange
-access-list 102 extended deny tcp any eq smtp any eq smtp
-access-list 102 extended permit ip any any
-access-group 102 in interface inside
after i apply this ACL to the ASA, i am still able to send from my internet email address setup in Outlook using my "foreign" smtp server.
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Oct 2, 2012
I need to open some outbound ports in order for our CCTV company to receive alarms from our internal CCTV Machine.
The ip addresses of the company who access the CCTV are as follows:
213.130.134.56
81.130.198.97
The above are fixed IP addresses. The internal machine is on 192.168.204.170
The outbound ports that I need to open are the following:
TCP
21
23
80
5201
UDP
1025
2074
2075
I have access to the current config if needs be.
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Mar 26, 2013
What I'm trying to do seems pretty basic, but I cannot get it working on the RV180?I have 5 Fixed IPs. Using Access Rules I have configured a few inbound rules with specified WAN Destination addresses and these are correctly port forwarding these inbound ports on the specified Public IP addresses. Perfect!
However, for outbound, I need to do the equivalent for one public IP for outgoing SMTP so that our mail servers public facing address is not the standard WAN address and therefore will not fail a reverse DNS lookup. At the moment I have emails bouncing all over the place and panic has set in. I thought the SNAT option was the soltuion, but that just seems to break traffic flow completely on the specified port. I had this working no problem on my old Netgear, but I had to replace it due to throughput limitations.
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Sep 12, 2012
Cisco Router 2900.My setup pppoe dsl 8mbps and i read on other website kinda sound of MTU.. but i dont know what is this or exact number of MTU. [code]
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Jan 24, 2012
I have the need to do an outbound NAT redirection. So what I mean is this. I have a custom program that uses SSH to port 22 from a server inside the ASA firewall. This goes out to a server on the Internet over port 22. The ISP of the SSH server told me that they changed their SSH port from 22 to 2102. So instead of changing the custom code on the developed application on the server... I thought it would be easier to do a OUTBOUND NAT redirection for the ASA to see port 22 from the server and redirect it OUTBOUND to port 2102.
so for example:
The server is at 192.168.0.2 and it uses a program to initiate SSH traffic to 205.246.1.1. The server sends to port 22 but I need it automatically changed on the firewall to port 2201 at 205.246.1.1.
It is a Cisco ASA 5510. The server at 192.168.0.2 does have a fixed IP address on the outside with INBOUND NAT for things like port 25 (mail) traffic etc. Lets pretend that was at 64.18.23.60.
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