Cisco Firewall :: 5520 VPN Gateway With Kind Of Restriction
Jul 7, 2012
i have asa 5520 configured as VPN Gateway to terminate remote access vpn , i have question , how can i restrict the access to only 1 range of public source IPs to access my corporate via RA ,is this possible?if so how to configure it?
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May 17, 2011
I need to move the client machines off of the 3750 (and their DHCP dependency on it) to the SGE2010 and absolutely route their internet traffic out through the outside interface on the 5505. They must also be able to communicate back into the internal environment in order to communicate with the production servers.
The clients currently use .254 addressing through a dumb dell switch to the 3750 but I am trying to migrate them over slowly to the .253. I know that the 2010 will not do DHCP, so I am putting a DHCP server on that switch right now. The 5505 won't let me add an additional nameif statement onto one of the other eth0/x interfaces and I'm not sure if that has anything to do with it's capabilities to act as a DHCP server (it's not an option in the ASDM) or it's ability to serve as the internet gateway for the 2010 clients. (Side notes: The 5505 has a base license and is currently also connecting 1 site to site VPN. As is the 5520, so all of it's interfaces are used as well).
I statically assigned a moved client with a .253 address and plugged it into the 2010. I have tried giving the 2010 both a .4 address and a .253 address but neither will allow me to ping any of the addresses on the 5505. The 2010 shows automatic routes to the two subnets and I set it's default route to 253.1. The link between the 2010 and the 3750 works - clients receive a .254 address from the 3750 and can get out to the internet via the 5505 and reach the production servers as well.
Why won't the 2010 see the 5505 as a gateway and allow clients to get to the internet and also traverse the 3750 when they need access to the production network?
The reason why I dont' just connect the two swtiches and call it a day is because I also need the production servers to ALWAYS go out/receive web requests via the 5520 outbound/outside interface. I'm having such a hard time wrapping my head around why i can't get my clients moved over to the new switch, I haven't even grasped how I'm going to do that yet.
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Apr 28, 2013
I have ASA 5512X and I'm trying to run CX features on it. but the problem is I don't have SSD drive in the chassis. how can I get one? is any kind of SSD drive compatible with cisco ASA-CX firewalls or i should order it from cisco only? what is the part number for that model?
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Jul 2, 2012
There are 10, 50 and unlimited users profiles for the ASA 5505, reason for that restriction? Does that mean for example that only 10 users can go through a 10-user 5505?
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Nov 23, 2011
We are using ASA 5510 Version 7.2(4) at our organisation. The requirement is we need to give an access to a user with limited access so that he can run only specific commands on configuration mode. We don't have Cisco TACACS server instead of that we are using a microsoft radius server.
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Mar 31, 2013
I have 2 questions to confirm and/or get direction on how to modify.
1) is there a way to get around the (seemingly arbitrary) class C (slash 24+) subnet restriction for the primary/main IP address for the internal LAN?
(I realize I can setup multiple internal subnets but that also seems to introduce restrictions for port ‘forwarding’ and ‘one-to-one NAT’ use because those features seem to be restricted to the primary/main IP subnet)
2) it seems like all traffic is passed to the host on the internal side of a ‘One-to-One NAT’ regardeless of the firewall rules in place, is that what is be expected?
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Oct 20, 2010
One of my Clients just aquired a CISCO ASA firewall, and they would like to restrict internet access, that is they want to block internet for Junior employees while managemnet remains connected, Looking at the situation, The ASA serves as the gateway,I tried an Access list like below for one pc to test if it works but instead everyone just went off, may be i misfired somehwere.
Access-list 110 deny tcp any host 192.168.20.100 eq wwwAccess-list 110 deny tcp any host 192.168.20.100 eq 443Access-list 110 permit tcp any any eq wwwAccess-list 110 permit tcp any any eq 443access-group 110 in interface inside
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Jan 22, 2012
actually im using a cisco asa 5520 as a default gateway to acessin/ publishing in the wan. i have a cisco 2811 configured to replace the cisco asa in a case of problem, but the switch is made manually. my lan switch is a 2 3560e configured with hsrp, so it is possible to make redendancy( failover) between the cisco ASA 5520 and the cisco 2811 using a hsrp or other technic.
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Apr 9, 2012
I am struggling on a problem for over 2 weeks despite of various researches.
We have a Cisco router, then an ASA 5520 8.4(3).
The private interface of the ASA is connected to a switch, and so on connected to one interface of the router.
The private interface is as following : 129.88.63.253 255.255.248.0 (/21) =>
It is in the 129.88.56.0/21 subnet
Here is the part of the router config we are interested in :
!
interface Vlan32
ip address 129.88.63.254 255.255.248.0 (this is the tunnel default gateway configured on the ASA - 129.88.56.0/21 subnet)
ip address 129.88.71.254 255.255.255.0 secondary
ip address 129.88.75.254 255.255.252.0 secondary
ip access-group CVPN-depuis-129.88.56 in
ip access-group CVPN-vers-129.88.56 out
ip verify unicast source reachable-via rx allow-default
no ip redirects
mls rp ip
!
On the ASA, there is currently one default route for the tunneled traffic :
route Private 0.0.0.0 0.0.0.0 129.88.63.254 tunneled
As you can see, it's on the same subnet as the primary IP address of interface Vlan32 on the router.
The scenario is as following :
- we can connect to the VPN with the appropriate alias (LDAP connection), then we get an IP address in the defined range (it's a local ASA pool)
- the pool is : 129.88.71.0/24
- but, once we are connected, we can't do anything, because it seems like we don't have any network access
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May 30, 2012
I have an ASA that houses 11 VLANs, and I am trying to add a 12th.One of the VLANs is for PCs that have internet only access.The new VLAN will be similar, but for multifunction printers only.VLAN 99 is for internet only and works fine, I can ping the gateway of 10.99.3.33 from any PC in that VLAN.I am creating VLAN 98, modeling it after VLAN 99, and I cannot get a PC in the vlan to ping the gateway of10.98.3.17.Both switch and ASA show the new VLAN 98 as UP, switchport is UP/UP.I have deleted and recreated VLAN 98 a few times, but I cannot get a PC VLAN 98 connectivity.Once it is working on the core switch, I will add it to the trunk to the IDS switches. VTP is not in use, everything is manual. [code]
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Feb 4, 2013
i want to acces the video content of the Dutch television channels, but i am living abroad, they track the ip, see i am not in holland and dont show the content. There are some companies providing a vpn subscription in the Nethderlands for 15 Euro a month and that works perfect, just its a little expensive. Now my hope was to buy a seccond hand vpn router, that i want to put at my parents place in holland, and some how use it in the same way as the vpn service of the company. So using it to connect, and browsing trough this connection to get a Dutch ip.
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Feb 2, 2011
What kind of DRAM memory compatible with 3845?
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Jan 18, 2012
According to documentation Cisco RPS 675 should have support for Cisco 3750v2 switch(WS-C3750V2-48PS).What kind of cable should be used to connect them?Cisco RPS has 16 pins and 3750v2 has 22 pins.I could not find that type of cable,
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Nov 20, 2011
What device would be necessary to link two networks of identical type? What devices would be necessary to link two networks of dissimilar types?I would say a network card and HUB for identical type but I do not know if this is correct?Describe the parameters governing the choice of cable type for a given network. What are the three main types of cables used in computer networks?
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Oct 1, 2011
Does it matter what kind of modem and wireless router to make DSL the fastest? Also is a modem with built in wireless better than having separate units?
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Sep 30, 2012
I have a 1.25 mbps download and .2 upload speed. I have a netgear n600 router and have wireless and cannot change to wired. I have around a 120 ping all most always. My current speed is the best in my area too. Is there any kind of equipment that will give me a lower ping for online gaming? Is there any router settings for this?
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May 11, 2011
I was wondering what kind of wireless network adapter stick I should get for my windows 7 computer? My older one somehow had issues (device was not recognized or whatever)
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Nov 2, 2012
We were using ASA-5520-K9 with ASA-SSM-AIP-20-K9 but recently found some hardware problem in our running ASA. Now cisco want to replace with ASA-5520-K8.
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Apr 26, 2011
What kind of cable is required to connect to the Console on a Linksys SRW2024 switch ? ( I've lost the original cable )I use the following settings: Speed 38400, 8 bits, no parity, no flow control and stop bits 1I have tried a serial cable, no go.I have tried a null modem cable with partial handshaking, no go.I have tried a null modem cable with full handshaking, no go.For the null modem cables, if I use it to connect between computers using hyperterminal it works very well. What I type on one computer appears on the other computer's screen.However, I can't get anything out of the switch. I've tried pressing Enter repeatedly, resetting the switch with the Console cable on, etc.
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Jan 31, 2012
I wondering whether the Linksys e1200 and/or e1500 offer any kind of Denial of Service (DoS) protection?I'm currently looking for a new router and would love some info.
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Feb 27, 2013
I'd like to see some REAL LIFE comparisons of ASA firewall throughput (a bit like this one for ISR G2 Routers - [URL].
The reason I ask is that I recently upgraded a firewall from an ASA5505 to an ASA5520 on a small network where the only outside connectivity was a single 10meg Internet circuit with an IPSEC VPN (not landed on the firewall but on a router) to another site.
When I swapped out the firewall the users noticed a big improvement. The firewall is not doing anything out of the ordinary - no IPS or VPN, just standard state full inspection.
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May 5, 2013
I have an asa 5520. How would I configure my dedicated management interface to be able to route off subnet while the firewall is in transparent mode?
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Jul 26, 2012
We are using the newest release of AD Agent (1.0.0.32.1, built 598). The ASA Firewalls 5520 are having the software release 8.4(3)8 installed.When somebody tries to connect thru the Identity based firewalls from a citrix published desktop environment (PDI) the connection is not possible. Checking the ip-of-user mapping on the firewalls (show user-identity ip-of-user USERNAME) mostly doesn't show the mapping of the USERNAME and the PDI the user is logged in. The user-of-ip mapping of the PDIs IP-address shows mostly other users, which then are used to authenticate the acces thru the firewalls.
What is interesting, that on the AD Agent using "adacfg.exe cache list | find /i "USERNAME"" i can't see the PDIs IP-address neither because it is mapped to another user.Is Citrix Published Desktop environment supported to connect thru Identity based Firewalls? How AD Agent, Domain Controllers and Firewalls are working together? On the firewalls with "show user-identity ad-agent we see, the following:
-Authentication Port: udp/1645
-Accounting Port: udp/1646
-ASA Listening Port: udp/3799
Why Cisco does use 1645 and 1646 and not 1812 and 1813?The Listening Port is used for what purpose? we tried the AD Agent modes full- download and on-demand with the same effect.
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Apr 15, 2013
I try to launch a LAND Attack against my firewall ASA 5520. Everything will work fine. But why, I think it should not work. I use a little tool where I can user a spoofed address, with a cluster shell and attack the firewall interface with the source of 127.0.0.1 ore the ip address of the interface as the source and destination. Then I get a cpu load of 89% with only two host. With IP tables I can use kernel processes to prevent this. But I don´t find anything for ASA.
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Jan 4, 2012
Two different WAN links get connected to the firewall via two routers.(Different ip subnets).I need to get this two wan streams seperatly to the core switches.Core switches sits.Active/Stanby senario. If the Active core goes down Stndby Core will have take over the traffic. My design is correct ,if not what do i need to change. ASA is 5520.
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May 22, 2013
I have ASA 5520 installed. I want to use ntp server for firewall clock setting. I found one open-access ntp server (stratum 2) in Los Angeles:
[URL] 209.151.225.100
Can I use the following command to set ntp server?
ntp server 209.151.225.100 source outside.
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Jan 1, 2012
communication between 2 vlans.i have 2 vlans
Vlan 100
ip add 1.1.1.1
!
!
!
Vlan 200
ip add 2.2.2.2
i want to make communication between 2 vlans on firewall 5520 ASA 8.2.
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Feb 27, 2011
I have a serious problem with my corporate firewall, witch is an ASA 5520, fv 8.3, with 8 +1 interfaces. It suddenly started to crash every 10/20 minutes and rebooting alone.
First of all I checked system resources witch are in a very low usage state. I also checked interfaces errors, but nothing strange come out o from error counters analysis. I tried disabling logging and all the service policy rules configured, but nothing changed.
Nothing changed and firewall continue restarting by itself.
Last logs I received before crash were:
%ASA-4-711004: Task ran for 35 m sec, Process = Dispatch Unit, PC = 84a619e, Call stack =
%ASA-4-711004: Task ran for 35 m sec, Process = Dispatch Unit, PC = 84a619e, Call stack = 0x084A619E 0x084A6512 0x084A70E1 0x084A7987 0x084A7AAA 0x08558B9B 0x08558E8A 0x083D3518 0x083CA145 0x080659D1 0x089196D9 0x08919790 0x089FF711 0x08A27468
Here the sh crash info command on module 0, after last reboot:
[Code] ......
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Nov 29, 2011
we are having a firewall asa 5520 .we have connected the management port and inside port to internal network and dmz port to dmz network.now we need to configure tacacs and other management tool on dmz devices through management port. The problem is the management devices tacacs and other are placed in internal network.
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Oct 4, 2012
I have an ASA 5520 in my company which does all our NAT and Firewall access control. Currently there is a rule in place to allow an incoming connection on port 2222 from a specific ip address to allow access to a web app our developers created. This is a test before the web app is released live. Now the web app can communicate with the specific address and port but the incoming connection on port 2222 isn't getting through. Everything looks great in the firewall but how can I log any hits this ACL takes to identify any potential problems?
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Apr 8, 2011
Our Local Network is behind the CISCO ASA Firewall.Whenever we are accessing to Client VPN server,it is getting connected but after few Minutes (May be 5/10/30 Min),the sessions are terminating. The same traffic through PIX is no issue , only with ASA Firewall. See the following Error and request you give the possible root cause for this.
2011-04-09 16:15:09 Local4.Info 172.16.1.68 %ASA-6-302016: Tear down UDP connection 87447908 for OUTSIDE:68.22.26.66/4500 to inside:172.16.9.10/4410 duration 0:27:49 bytes 18653
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May 29, 2012
I have problem in the configuration of Cisco ASA 5520, IOS version 8.4. The connection is as follows: LAN network--> Firewall --> Routers with GLBP with virtual ip address. the clients can not ping the virtual interface of the GLBP group, but I can ping it from the firewall, and I can ping the clients from the firewall, I checked the packet tracer it gives :
Phase: 7
Type: NAT
Subtype:
Result: DROP
Config:
nat (inside10,outside) source dynamic LAN interface
Additional Information:(code)
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Jul 17, 2012
I am running the SGE2000 as my l3 core switch with multiple inter-vlans.
have a customer requirement that needs to restrict eg. GUEST-VLAN10 to all other VLANS in the network. Only allowing access to the internet.
It seems on the switch i am able to bind ACL to per port interface. if this is possible on the SGE2000
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