Cisco :: ASA 5505 Same Security Level Traffic?
Jun 27, 2011
I have ASA 5505 that has two inside security level 100 interfaces and an outside interface.On the inside interface we have corporate domain subnet with DC and 30 hosts. On the inside2 interface I have few servers that runs specific application important for our business needs, and dumb terminals that are connected to them.I have a laptop user that periodically needs access from our corporate vlan1 to one of the servers on inside 2 vlan via remote desktop or some other remote viewer client,so he can view reports etc.I have enabled same-security-traffic intra-interface command and added nat exempt command pointing specific laptop host machine to that specific server.
Now my main concern is regarding security. This user carries his laptop home, browses the web, puts USB memory, and you can imagine how this machine is susceptible to all kind of malicious software. Inside2 vlan is very important and until now it has been a very secure environment.This is no longer the case since all traffic between this inside sec level 100 vlan host and corresponding inside2 sec level 100 server is now allowed because of the enabled same level interface traffic and nat exemption rule. Do I have another solution that would allow communication based on just a tcp port number for this host? Something like port forwarding from outside to inside Vlan interface?
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Apr 11, 2011
why I would be getting traffic on my outside interface that has a destination address which is not my assigned outside address? I recently set up my ASA 5505 on the network and gave it an available outside address of say 192.x.x.250 on interface vlan 100. When I assign vlan 100 to e0/0 and bring the port up, I start seeing lots of traffic pour into the ASDM Syslog with various destinations belonging to my subnet but that are not actually destined for my specific outside address of 192.x.x.250.They are showing a destination of say 192.x.x.85 or 192.x.x.29.
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Sep 21, 2012
I have 2 dmz interfaces(dmz1 and dmz2) with security level 50. I am able to ping the hosts on dmz2 from dmz1. I am running a service on a dmz2 host on port 82 but i am not able to access that service from dmz1. Also, i have an inside interface at security lever 99 which is able to access that service.
Also, i have defined the following command to allow same security level communication.
same-security-traffic permit inter-interface
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Nov 10, 2011
On a Cisco ASA 5520. I have 2 interfaces that are the same security level. I need hosts on 1 of these interfaces to be able to get to a specific IP and port on the other but I DON'T want to blanket enable 'same-security-traffic permit inter-interface" I have added an ACL inbound on the interface allowing the desired traffic and inbound on the other for return traffic and it simply doesn't work.
interface GigabitEthernet0/3.175
vlan 175
nameif Test175
security-level 30
ip address 172.30.175.1 255.255.255.0
[code]....
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Feb 3, 2011
We have an ASA5520 firewall, IOS 8.0(4), running in routed mode with an operational Cisco 2821 router to ASA-5520 L2L IPsec VPN.:All Internet searches explain how to enable a L2L IPsec VPN from the LOWER security-level interface to a HIGHER security-level interface- and this is how our setup is configured and it is operational and working fine.:We now have a need to setup another L2L IPsec VPN tunnel on the same firewall BUT this time traffic will be arriving on the HIGHER security-level interface destination is to a LOWER security-level interface.:Is it possible to enable a L2L IPsec VPN tunnel between a HIGHER security-level interface to a LOWER security-level interface?
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Mar 27, 2013
I have issue with traffic passing between same security level interfaces. I want to control traffic between same security level interfaces with ACL. Even no restriction, traffic does not go through. [code]
I tried to access server from THREE network to web server at FOUR network I have no response. In sh xlate output it shows "PAT Global 10.124.104.254 (28889) Local 10.124.103.1(2922) " I am not sure what else should I do. I add both same-security-level commands and it is the same.
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Jan 28, 2013
Quote from the RV180 manual; 'By default, all access from the insecure WAN side is blocked from accessing the secure LAN, except in response to requests from the LAN or DMZ.'
Does this mean a general access-rule for the firewall blocking all inbound (WAN --> LAN) data is not required?
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Nov 16, 2012
I'm trying to implement some best practices for ASA running on Software Release 8.2 and had a question about the default security-level behavior. Let's say I have 3 interfaces...
-inside (security-level 100)
-dmz (security-level 50)
-outside (security-level 0)
I have an ACL on the inside interface allowing http access to anywhere. Because of the ACL, the implicit higher to lower security level access is nullified. Correct?
I do NOT have any ACL on the dmz interface applied. So, would the servers in the dmz be allowed outbound access to the Internet due to the default higher to lower security level behavior?
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Sep 21, 2011
We have an ADSM (version 5.2(3) ) . In ASA ( version 7.2(3)) we are working with routing, access restriction and configuring IPSEC vpn with integration to our AD. We need to get two diferent profiles: one for networking administrators, who are going to manage routing, acls and have the root for ASA, and the other profile is going to be for the vpn administrators. As I read from the ASDM 6.0 user guide is posible define command privilege level. So do you consider posible to define a particular level for all the command related with ipsec vpn (Create, Modify and Delete) and asociate that particular level with the user for vpn administration.
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Jun 25, 2011
I'm facing a problem with two vlans. Each vlan has internet access by NAT.
In each vlan there is at least one server, who should be accessible from the other vlan and vice versa.
The function "same-security-traffic permit inter-interface" doesn't work, because NAT control is in place - so an expert.
Some experts told me it's not possible to route back out the same interface, and also not route back out the seperate subinterfaces as well.
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Jul 14, 2012
I have ASA 5585 with SSP20. I want to enable same security level subinterfaces (routed mode) to communicate with each other.
I have put below command at global level but somehow it is not happening.
hostname(config)# same-security-traffic permit inter-interface
Do I also need to check for NATing or some other things apart from above command?
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Apr 15, 2013
I am trying to configure site to site vpn between Cisco ASA and Cisco router 3825, I need to establish the vpn connection with an interface that has security level of 90.I followed the procedure shown in the following link: URL.
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Jan 23, 2012
Verifying the operation of the ASA when configured with Global access rules. Does the global rule overide the interface security levels? According to the ASA order of operations, the interface specific rule get's processed first and then the global rules, but It does not say anything about interface security levels. Observing an ASA in production that has global rules configured I see that an interface with a security level of 50 that has no rules applied to it, passing traffic to the outside interface (security level 0) drops the traffic. Syslog shows that it hits the global access rule implicit deny. Does the implicit permit any to any less secure interface not apply?
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Feb 17, 2013
I have been monitoring the alarm summary but have been off couple days and i see one of my controllers is down. Getting critical level security and message is port is down on the controller, condition link down. The other issue is config difference found between NCS and Contoller, I tried getting them to sync together but still getting the same message.
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May 24, 2011
I have a ASA 5505 that I test with which originally came with the Security Plus license. I recently erased flash and loaded the latest asa841-k8.bin version of IOS along with asdm-642.bin. Everything booted fine and came up as it does when freshly wiped however I noticed that i was now only running a base license. If I issue the sh activiation-key command, I noticed the following messages (full output is at the bottom):
The Running Activation Key is not valid, using default setting
......
This platform has a Base license.
......
Failed to retrieve flash permanent activation key
Did I somehow kill my Security Plus licensing when I did the erase flash? If so how do I recover it?
ciscoasa# sh activation-key
Serial Number: JMXXXXXXHU
Running Permanent Activation Key: 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
The Running Activation Key is not valid, using default settings:
Licensed features for this platform:
Maximum Physical Interfaces : 8 perpetual
VLANs : 3 DMZ Restricted
Dual ISPs : Disabled perpetual
VLAN Trunk Ports : 0 perpetual
[code]...
This platform has a Base license.Failed to retrieve flash permanent activation key.The flash permanent activation key is the SAME as the running permanent key.
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Apr 18, 2012
For some reason my ASA is preventing my traffic from going out. I've added some crumby access-list and applied it to NAT for it to work. I don't like this. I know it is not right, but I am not sure what part is wrong. I will highlight the stuff I have added to make it work. I don't see what I am missing. If I were to remove these lines my ASA could ping in both directions (in and out), but my LAN cannot do anything but ping the ASA. No other traffic is going out unless I have added these unsafe lines of code.
!
interface Vlan1
nameif inside
security-level 100
[Code].....
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Jan 16, 2013
when I run nestat -b command. I always see a lan ip sending TCP traffic to my computer with state syn_receivedProto >> Lan Address >> Foreign Address >> state >> Process idTCP >> (my ip) >> 192.168.2.222(lan ip) >> syn_received >> 4
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Dec 5, 2012
I am able to ftp from my Head Office to my test machine at the remote location but I can't get the other way around to work. Error message from the Syslog deny tcp src 192.168.50.5/1825 dst 208.124.202.44/21 by access-group "dmz_access_in".I try a couple of ways to fix it but no luck.A partial config of my ASA 5505. [code]
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Sep 7, 2011
I've got a client that recently got an ASA 5505. E0/0 is connected to the outside, E0/1 connected to the internal server (Win 2008). The ASA "local network" is 172.30.1.0/24; my internal network is 192.168.1.0/24. I'm able to connect from home through AnyConnect and get a proper address (which I've got a pool of 172.30.1.64/26 assigned for VPN users), but no traffic from my computer will go to the internal network, nor will the internal server (or the ASA for that matter) can't talk to my VPN'd computer.
On the firewall settings on the ASA, I've got it all open: any/any on both inside and outside, just to try and get anything to go through. I've even got split-tunneling working, but not traffic-passing! The config is below (redacting local AAA users).
[Code] .....
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Sep 26, 2012
I am tasked to connect my VoIP phones from remote site to my corp site. Basically all remote phones will be registering into a VoIP server in corp site. I have a site to site vpn tunnel established already from remote site to corp site. My hardware includes the following:
-Cisco ASA 5505
-Cisco small business POE switch SF300 24p
-Avaya 2015p VoIP phones
Successfully Register remote VoIP phones to corporate VoIP server 10.30.18.55.I have already configured vlan1 10.30.15.0/24(inside lan) and vlan2 public int(outside Internet) which my dmz only allows 2 per my basic asa licensing.When I connect my phones and register it states "subnet conflict" unable to register.
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Apr 9, 2013
I have a client with an ASA 5505 who has several networks he's trying to get communicating over a VPN tunnel with a remote office. One of the networks is not working because it's also in use on the management interface of the other side of the tunnel and neither side seems willing to re-IP their internal space.
Their proposed solution is to NAT the conflicting network on the firewall on this side to a different subnet before passing it across the tunnel. How do I implement a NAT that only the VPN tunnel uses while keeping the rest of the traffic that comes across this device un-NATted?The network in question is 192.168.0.0/24. Their desired NAT target is 172.16.0.0/24. ASA config is attached.
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Jul 24, 2011
We have a BT Infinity broadband circuit which terminates at a vdsl modem, I've plugged an ASA 5505 into the back of this modem and gone through the ADSM quick setup wizard (yes I'm that much of a beginner!) The config that's been generated is pasted below, the symptomns I'm seeing are;
The ASA is setup with PPPOE on the internet connection, I assume this is correct as if I do a show IP on the ASA I'm getting an IP address that has been assigned, if I change the password to the wrong one then I get no IP (as expected).
If I ping from the ASA to an internet connection I'm getting "no route" error messages, if I try a "ping outside x.x.x.x" then I get no repsonses.
The ASA can ping it's external IP, the client machines can ping it's internal, however nothing appears to be able to get out.
ASA Version 8.4(1)
!
hostname xxxxxx
enable password xxxxxx encrypted
[Code].....
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Jan 23, 2011
Is it possible to configure cisco router like C3800 or catalyst switches like C4500 or C2960 to filter traffic based on allowable mac addresses only? I would like only to allow those devices that belongs to the domain, meaning if a user connects a computer or any devices that concerns network which I have not allowed the mac addresses, it will be denied access to the network. However, any of the allowable devices could able to use any port of the switch, meaning I dont want to associate an allowable Mac Address to a physical port on the switch.
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Dec 5, 2010
I've a asa 5510 on the main site and different ASA 5505 on secundary sites for VPN tunneling between the sites. The problem is that the tunnels are acomplished but no traffic is going over them. What am i doing wrong? For the moment there is a ASA 5505 on the main site managing the tunnels but I want the 5510 to take over the job.
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Apr 11, 2012
We have 110mbps internet service. When we have the 5505 behind the cable modem, our speed drops to 55mbps or so. If we remove the 5505, we see the full 100mbps. I assume the 5505 can handle the speed; if so, what other things should I be looking at?As an aside, we used to have 50mbps wich worked fine, then the ISP upgraded to 60mbps and the through put dropped to 30mbps (It always seems to be half)
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Jun 25, 2012
My understanding is for insight to outside we need global and NAT, and for outside to inside we need static and ACL? Traffic goes to high to low, I'm just start working with 5505 recently.
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Feb 1, 2011
So I have an asa 5505 running ipsec and anyconnect and it has been working great for months. I have not made any changes to the config, but suddenly all of my anyconnect traffic is being dropped. The vpn uses the same subnet as the LAN. I tried putting a rule in to allow all traffic from the LAN subnet on the outside interface. Now I just get the WEBVPN-SVC Action-Drop in packet tracer.
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Feb 4, 2013
Two 5505 ASA's for a customer main site and a local office. I have the tunnel up. But I'm unable to pass traffic across it.
Main Site:
ASA Version 7.2(4)
!
hostname Town
enable password iNbSyJZ1ffmb9kn1 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
[code]....
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May 26, 2012
I've configured an ASA5505 to be Lan to Lan VPN tunnel endpoint, peering with a linux box. The ASA is full licensed so that side isn't an issue.PROBLEM:When the tunnel is initialised from the linux box everything comes up okay except the ASA isn't encapsulation any packets. It is decrypted the packets received from the Linux box okay but no return traffic is being encrypted.When the tunnel is initialised from the ASA, nothing happens.After some troubleshooting I've found that the ACL defining interesting traffic nor the ACL defining NO_NAT aren't being hit at all.
ACL for NO_NAT:
access-list NO_NAT line 1 remark ACL USED TO DEFINE WHAT TRAFFIC NOT TO NAT OVER THE VPN
access-list NO_NAT line 2 extended permit ip host PAMS_SERVER object-group LINUX-BOXES 0xc736d5fb
access-list NO_NAT line 2 extended permit ip host PAMS_SERVER 10.11.228.0 255.255.255.0 (hitcnt=0)
[code]....
I've checked with the administrator of the linux box and the definition for interesting traffic is exactly the same (except in reverse as should be the case).The firewall is doing other things like NATs and such like too but those NATs have nothing to do with this VPN. The setup is a LAN to LAN connection with no natting in between.The main parts of the config are attached, i've deleted things that should have a bearing on this however if you think it necessary i can sanitise the config and re-post. I think it will be working fine as long as the traffic hits those ACLs, however they're not and I'm unsure why.At this time i'm not seeing anything at all when doing an debug cry ipsec or debug cry isa. The ACL's aren't being hit so i'm guessing it's not even trying to form the VPN as it can't see any traffic that constitutes being 'interesting'.
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Mar 19, 2011
I have a Site to Site IPSEC VPN Tunnel created with ASDM wizard.
Cisco ASA-5505
Peer A: x.x.x.x
Lan A: 192.168.0.0 255.255.255.0
Fortinet FortiGate-50b
Peer B: y.y.y.y
Lan B: 192.168.23.0 255.255.255.0
I start traffic from LAN B with a ping (or telnet it doesn't matter) that receive no reply but tunnel goes up fine.
"show isakmp sa" seems ok (says "State : MM_ACTIVE")
"show ipsec sa" seems ok but all #pkts are zero
try ftp, telnet from LAN B to LAN A systems but no one work. "show ipsec sa" all #pkts are zero As soon as I generate traffic from LAN A to LAN B these works (with tunnel already up) also traffic from LAN B to LAN A works.Obviously if I end VPN and start tunnel making traffic from LAN A all work fine bidirectionally, LAN A reach LAN B and LAN B reach LAN A.No msg logged in either two appliance.
Seems a very strange problem because seems not related to Phase1 or Phase2 already established.Traffic (routing ?) start works only after at least one packet goes from LAN A to LAN B.No msg logged in either two appliance.Problems begun in ASA version 8.0(4) ASDM version 6.1(3) and remain/continue after upgrade to ASA Version 8.4(1) ASDM version 6.4(1).
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Oct 27, 2011
I have VPN up and running between two sites. Both sites have Cisco ASA 5505. I can ping across the devices from both networks. But I cannot remote into the servers on the other network.
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Aug 15, 2011
I have a Cisco ASA 5505 that I have configured. The outside interface is vlan 2 and the inside interface is vlan 1. Port 0 of the ASA is configured to be in vlan 2 and is connected to the ISP provided subnet. Port 1 is connected to my private LAN subnet. I have an additional router connected to Port 2 for guest connectivity. Port 2 is configured to be a member of VLAN 2 so that it can access the ISP provided subnet. From the device connected to port 2 I can ping the vlan 2 interface address of the ASA and from the ASA I can ping the Default gateway of the ISP provided subnet. For some reason the router on port 2 cannot ping the default gateway of the ISP provided subnet. If the vlan were working the same as a vlan in a switch, I would expect to be able to do this. why it is not working or what I can do to get it working?
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May 24, 2011
I'm trying to allow SSH traffic from the Internet to my DMZ. I gave my remote guy my ip and he can see the ASA 5505 but not get into the DMZ. The outside is 70.165.19.137. The DMZ server is 192.168.60.2. I have the inside talking to the DMZ fine. [code]
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