Cisco Firewall :: Internet Access Through ASA 5540 For Specific Network Object Group
May 2, 2011
I have a 5540, and i am trying to allow access to internet for an specific network object group, who has inside a bunch of users, who needs direct internet access without any restrictions, i have tried with dynamic NAT, but that configuration ask for a specific IP o a Network range, and is not permitted to configure an object group as a source
The group is located in LAN zone, so a permission from one zone to another zone is needed i think, but i can allow the internet acess to that group Is there another way to get that , different from NAT ?
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Apr 7, 2013
Does the ASA treat an object-group with a network-object containing a range of IP addresses as a netmask? For example, I can apply this configuration without the ASA throwing any errors though the configuration calls for a 'net mask':
object-group network test
network-object 192.168.0.0 192.168.63.255
?
network-object-group mode commands/options:
A.B.C.D Enter an IPv4 network mask
sh run ob id test
object-group network test
network-object 192.168.0.0 192.168.63.255
I found that in the documentation it requires a netmask as oppose to a range. Is this a bug in the code? I am running code version 8.0(5)23 on a 5520. If this is not a bug how does the ASA treat this type of configuration when applied to an access list? When I ran a quick packet trace and denied access from that range it looks like the ASA doesn't read that configuration properly.
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Oct 29, 2012
We have Cisco ASA 5510, I am about to add another 2 Objectgroup network groups on the firewall to our already growing list. Under this Object-group Network xxxx , we are planning to add about about 500 network-object host xxx.xxx.xxx.xxx . This objectgroup will then be applied to an ACL. Just wanted to know if thats possible - meaning addnig 500 hosts? If it is whats the limit?
Also are there any other things to keep in mind before i go-ahead with this huge object group?
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Dec 17, 2007
When ever I create a network object in ASDM 6.0(3) the UI also wants to send the command 'asdm location (network object IP address)' to the device.What is the purpose of 'asdm locaction ....'? Is it telling the ASA-5540 that the IP address is allowed to connect to the device using ASDM?If that is the case why does 'asdm location xxx.xxx.xxx.xxx'get denerated for every network object I create?
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May 16, 2011
When I create a service object or group and add the object to a new rule it never works.I mean the traffic match not the rule. I see not hits.I placed the rule on top of my access list to check if I do somethink wrong but it is not working. When I place only a service for example tcp/23 it is working.
my ip service object
object-group service g-as400 description access client 2 as400 machine service-object tcp-udp destination eq 397 service-object tcp destination eq 137 service-object tcp destination eq 2001 service-object tcp destination eq 3000 service-object tcp destination eq 445 service-object tcp destination range 446 447 service-object tcp destination eq 449 service-object tcp destination eq 5010 service-object tcp destination eq 5544 service-object tcp destination eq 5555 service-object tcp destination range 8470 8476 service-object tcp destination eq 8480 service-object tcp destination eq
[code]...
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Apr 19, 2010
I'm actually require authentication for users who are coming from the PublicVLAN (the vlan associated with the wireless hotspot) to authenticate themself to the LDAP server via my firewall ASA 5510
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Jan 8, 2012
I'm a college student working on a lab involving a Cisco PIX 501 Firewall.
My project involves 1 computer and a firewall. My goal is to use the firewall to allow access to the internet for that computer which uses a static IP 192.168.1.5 and ONLY for that IP address. The firewall is connected to the internet.
I have the computer hooked up to the firewall with the serial and using hyper terminal to enter commands. I think I need to use access lists in order to deny traffic on those ports for those particular hosts. I can't figure out exactly how I need to set it up.
What I need to do is permit internet access for 192.168.1.5 alone. Any other IP should not be able to access the internet.
I tried:
access-list 1 permit tcp host 192.168.1.5 any eq 80
access-group 1 in interface inside
I cannot access the internet using the computer with 192.168.1.5. The goal is to be able to access with that IP and no other.
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Feb 5, 2013
Any one know when object-group ACLs will be supported in cat4500 IOS-XE ?? Doesnt seem to be supported now.
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Feb 6, 2013
I have 3 ASA 5510s; two of which are in production and the 3rd one is new. I inherited the two in production and was trying to configure that 3rd one using some of the existing object-group network statements. The problem is that when I try to create a range of IPs in one of the object-groups; the range command is not available. Here is one of the statements extracted from one of the production ASAs: object network REMOTE range 62.77.130.14 62.77.130.208.Both ASAs have the same image ver (asa842-k8). Is there something that I am missing to be able to enable the range option on the new ASA?
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Jan 2, 2012
In cisco router 2911 how to creat a network object with port permission on ACL. herz what i have done but couldnt succeed in port 22 and 24 should be denied and rest all port services are allowed to outside interface. [code]
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Feb 16, 2011
I have two layer 3 switches C3560 and C3750 Cisco switches with ios version "ipservices-mz.122-35.SE5".Now with the current ios version, these layer 3 switches are not supporting object group.so my question is , do i need to upgrade the ios, for this feature, if yes, which version ?
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Aug 18, 2011
My company has a peer to peer network of 10 personal computers without a server. Operating systems from Windows XP to Vista. I've recently installed a Cisco RV120W Wireless-N VPN Firewall. It's configured in DHCP Server Mode with printers/copiers that have static IPs below the DHCP range.
I'm having a problem with certain stations being used for personal networking, shopping, etc. during business hours. Consequently I would like to limit internet access on these stations. However, some internet access is required because of online database software that's an integral part of our business. I've been reading in the Administration Guide about URL Blocking. Would it be possible to give static IPs to certain stations and then limit their internet access to 1 or 2 specific websites?
FYI, I've read about the Trusted Domains and Blocked Keywords but cannot quite understand how to parley this into the solution I need.
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Dec 31, 2012
Can i use acl object group with wccp redirect list?My platforms are 6500 and isr 2921
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Aug 19, 2012
There is something wrong with the ordering of our NAT-rules.We are running ASA Version 8.4(2)8 and the nat config is pasted below.
I want outgoing smtp-traffic to be translated to xxx.yyy.zzz.18, but instead it's translated to xxx.yyy.zzz.20 (the outside-interface address).The same goes for ftp-traffic, according to packettracer this is also translated to the xxx.yyy.zzz.20.
Ciscos manual states that static nat rules takes precedence over dynamic nat but that doesn't seem to work for us. [code]
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May 10, 2011
I am troubleshooting a s2s vpn between an ISR871 and my ASA5520 and I suspect a problem with my crypto-maps.
Is there a way I can display an access-list on the ASA and have the object names substituted with their IP addresses?
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Jan 30, 2012
I have recently upgraded my ASA 5510 to 8.3 code and honestly I am confused on the best and most efficient way to do many nat translations through it. I have a group of about 100 IP's that need http/https/and sqlnet allowed through for our web farm.
I have a text file with the real and translated IP addresses and in 8.2 I could simply modify it and dump the thing in and make the NAT rules and access-lists. Now with the new object based model I am having a hard time wrapping my brain around how to do this using as few lines of code as possible.
Do I have to create an network object for each and every IP i want to nat through?
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Apr 28, 2012
I just tried to do a quick privilege level setup for a user to limit access to asa. User should be able to add nat's to configuration.ASA 8.4 is in question and trying the following does not seem to work:
privilege configure level 3 command object,gives me ,ERROR: specified command 'object' not found in any mode.It looks like localy this cannot be done or I am doing something wrong?
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Aug 5, 2011
We are facing the problem in ASDM 5.x creates duplicate network object groups in the configuration when PIX with software 7.0.7 is used.
Audit report its showing below commands :
asdm group SALES_ref dmz2 reference SALES object-group network SALES_ref network-object 172.20.7.8 network-object 172.20.10.3 network-object 172.20.11.2
no access-list dmz2_access_in extended permit tcp object-group Network_10.10.1.0 object-group SALES object-group SALES_Ports access-list dmz2_access_in line 200 extended permit tcp object-group Network_10.10.1.0 object-group SALES_ref object-group SALES_Ports
i was created SALES object group 2 month back after that ASDM Automatically created the duplicate object with SALES_ref name and changed the old ACL.
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Oct 25, 2011
I'm migrating our network objects from our current firewall to a new ASA 5520 configuration. I'm using ASDM 6.4 for configuration.
We have a range of IP addresses for hosts that we need to add to a firewall rule/ACL. In the previous FW software I could create an object that was a range of IP address. For example there is an object called emailservers that is defined as 192.168.2.25-192.168.2.50.
Is there a way to do a similar thing on the ASA 5520?
I can see how to create subnets, but in this case I only have a range of IP addresses, no subnet mask.
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Jun 19, 2011
this is ASA5520 associate with 8.4(1). very simple scenario , three ports: inside . outside . DMZ my problem is how to use network object NAT to perform Regular Dynamic PAT and Identity NAT.
for example, this is my configuration
**** first i configured Regular Dynamic PAT****
object network myinside
subnet 10.200.11.0 255.255.255.0
nat (inside,outside) dynamic interface
**** then , i met problem when i want to make identity NAT between inside and DMZ****
**** if i add below CLI , the first nat line will be replaced ****
**** SO IF I ADD THIS****
[code]......
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May 13, 2011
I would like to ask some question about VPN clinet and SSL VPN, on my ASA 5510 i have many tunnel-group it have around 5 tunnel-group and i have one SSL VPN,i also have user 20 user. let me show you that:
1- tunnel-group Staff-VPN remote-access
2- tunnel-group Manager-VPN remote-access
3- tunnel-group normalstaff-VPN remote-access
4- tunnel-group guest-VPN remote-access
5- tunnel-group other-VPN remote-access
and tunnel-group sslgroup type remote-access
and i have user around 20 user and i want to specific user to tunnel-groups like this
1- tunnel-group Staff-VPN remote-access
username AAA password AAA
username AAA01 password AA01
2- tunnel-group Manager-VPN remote-access
username BBB password BBB
username BBB01 password BBB01
3- tunnel-group normalstaff-VPN remote-access
username CCC password CCC
username CCC01 password CCC01
5- tunnel-group other-VPN remote-access
username DDD password DDD
username DDD01 password DDD01
So, How can i manag tunel-groups with user?
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Nov 7, 2011
I'm trying to add an access-list rule to allow internal servers to connect an outside host on a asa 5540. The hostname translates to multiple ip's. Normally I just lookup the ip address or one of the ip's the hostname translates too and use that in the access-list as the host. For some reason the actual ip's, which are a few, are not always available so using a specific ip sometimes does not work, thus the reason I have to use the hostname instead of the ip. I have 2 hostnames. www.hostname.com and subdomain.hostname.com.
This is how I normally add these rules (the ip addresses are fictive): access-list internet_access extended permit tcp host 192.168.50.5 host 84.115.57.121 eq www log
When I try to add this using the hostname on our asa I get an error: access-list internet_access extended permit tcp host 192.168.50.5 host www.hostname.com ?ERROR: % Unrecognized command
I've tried it without the 'www', so hostname.com but same error.
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Feb 6, 2013
I just started configuring AnyConnect with ASA 5520 that uses Cisco SecureACS to pass radius authentication. I configured two profiles with different split tunnel restrictions and what I discovered is that when the client connects to the ASA, they are provided a choice of these two groups (I guess there is no way to restrict this) and I can log into either one with any user account. How do I restrict this so that the user can only use one profile? Currently users capable of VPN would be placed in one specific AD group so that is what SecureACS checks. Is there a sample configuration guide to handle multiple profiles with different levels of access?
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Mar 7, 2012
-1x Cisco ASA5540
-1x Catalyst 3750x-48T (L3 Core Switch)
Id like to seek expertise on validating a simple firewall setup.
Do i trunk core switch traffic to the cisco ASA OR assign L3 link instead? It is basic understanding that the Cisco ASA is usually use for protection from our internet zone.A typical Cisco ASA setup would consist of outside, inside, dmz zone.
L3 core switch consist of 20 VLANS20 vlan needs to be blocked from each other. Eg Wireless Vlan does not have access to Server Vlan etc etc.
what is the best practise to filter ip address within vlan from reaching each other.Should i trunk all my vlan to the Cisco firewall? (For easy vlan restrictions: but is that best practise?)Or do ACL on the core switch itself? but what if i have tons of servers ip that needs specific ports blocking or etc.How would i be able to manage all my ACL on the core switch.
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May 23, 2013
I was asked to enable netflow in an ASA Firewall for Orion/Solarwinds server monitoration. Firewall is a 5550, with 4G RAM, and no extra modules but SSM-4GE. This firewall has 5 DMZ segments and ans specific segment for internet traffic.There are segments as unique subinterfaces in physical interfaces. Other segments as individual subinterfaces in the same physical interface (but individual VLANs)Usually firewall CPU flows between 30% to 40%. Rarely to 50%.
1 - How dangerous or risky could be implement netflow in this firewall?...This firewall is very critical for the customer. My concern is regrading CPU, traffic generated, memory, etc
2 - In a month, firewall will be migrated from 8.2 software version to 8.4 software version. Is there any incompatibility in some commands?...Would be recommended to perform netflow configuration after software upgrade?
3 - How could it be implemented for Orion monitoring, regarding each individual sub-interface (and so, each VLAN assigned)?I there any recommendation regarding configuration, best practices?
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Apr 25, 2013
I have some problem to get working ACLs. The main purpose of this ACLs is to control what is going out from vlan to internet. (For example, i want that only my proxy can access to the web.) So, i use Cisco Packet Tracer and test new rules in lab without any problem.
interface Vlan1
ip address x.x.x.x x.x.x.x
ip flow ingress
ip flow egress
ip nat inside
[Code]...
But it doesn't work on my Cisco 1811w and i dont uderstand why and i'm not sure to have sufficient knowledge to aolve my problem by my own.
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Oct 31, 2011
I have configured Clientless SSL VPN for access to ASA 5540 internal network. Still I am unable to take ssh to my core switc [code]
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Aug 7, 2011
We have ASA 5540. We setup Site-to-Site VPN and Remote Access VPN (Cisco VPN client). If are running full tunnel on the Cisco VPN client, the internet access is slow. For example, when we are running full-tunnel, the internet speed is 16 Mbps based on Speedtest.net. When we go to Speedtest.net, some of the graphics do not load. If we are running Split-tunnel, the internet access speed is 78 Mbps based on Speedtest.net and the Speedtest.net web site loads all the graphics.
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Jan 24, 2013
I do have one other question first. What's the effect of the crypto key zeroize rsa command, and then crypto key generate rsa modulus 1024 while I'm SSH'd to the ASA? Can I do it? Or do i need to be consoled in or connected a different way?
ASA 5510:
ASA Version 8.4(1)
asdm image disk0:/asdm-641.bin
asdm history enable
http server enable
http 10.1.1.83 255.255.255.255 inside
http 10.1.1.82 255.255.255.255 inside
Shouldn't that right there be enough to access ASDM from either host .82 or .83? Because I cannot. But if I add http 0.0.0.0 0.0.0.0 inside, then I of course can.
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Feb 7, 2012
For years now we've had an ASA5510 running an old version of ASA/ASDM (7.0/5.0) and couldn't access ASDM through a modern system with a recent JRE, so we didn't bother with this.
However, we've recently upgraded ASA/ASDM for purposes of adding failover and want to be able to access ASDM through our site to site tunnel. The site to site tunnel gives us access to the VLAN that the firewall is the gateway for, but not access to the firewall itself.
This side of the network is the 10.1.55.0 subnet, and that side of the network is the 192.168.1.0 subnet. I can ping devices on the 192.168.1.0 subnet, but not the firewall, (not that I really need to) and devices can ping me back. I can access ASDM through RDP or ssh into a server on the 192.168.1.0 subnet, but not directly from the 10.1.55.0 subnet.
This is the current config relative to the 10.1.55.0 subnet:
access-list trust_nat0_outbound extended permit ip 192.168.0.0 255.255.0.0 10.1.55.0 255.255.255.0
access-list untrust_cryptomap_600 extended permit ip 192.168.0.0 255.255.0.0
[Code]....
As far as I'm aware, the tunnel comes into the firewall through the untrust (public) interface, because that is the destination of the tunnel on the 10.1.55.0 subnet side.
What am I missing here that would allow asdm access through the untrust interface for the 10.1.55.0 subnet?
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Feb 6, 2012
We have Cisco Cat4503 series L3 Switch and Cisco L2 2560 Series Switches, some of the users want to have a dynamic VLAN membership, and connecting with the network as mobile users,
can it possible and create dynamic VLAN for specific group of users.
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Mar 6, 2011
We have ASA5500's deployed for remote access concentration.We use Cisco IPsec vpn client with a group policy the chacks for Network ICE BlackIce ersonal firewall.The powers-that-be wish to change to McAfee presonal Firewall ok..Now the Group Policy allows you to check for several pre- configured Firewalls, Cisco Integrated, Sygate, Zone Labs etc.So as McAfee are no listed then I am to assume we go for "Custom Firewall" and this is where I am struggling.To configure checking for a Custom Firewall I must have the Vendor ID and the Product ID.McAfee haven't the faintest idea what we're talking about when we ask them for these details.Or is there a way to extract them from the registry of a machine with the McAfee product installed?
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Feb 10, 2011
I'm just new with ASA. I'm just self-studying on it. I was tasked to have an ACL that will allow inside hosts to access a specific network. Is there a way on how to know all the inside hosts on the behind ASA so that I can do a "object-group network" on those inside hosts which I think it will look neat.
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