Cisco Firewall :: ASA 5505 - Create Access Rule To Connect To System Using RDP?
Mar 6, 2012
Just started using our ASA 5505 v8.2 (1) Trying to configure the ASA appliance to allow access into an internal resource (i.e want to be able to RDP into a system behind the ASA from the internet).I have used a static NAT:
static (inside,outside) 100.100.100.2 192.168.1.28 netmask 255.255.255.255
access-list OUTSIDE extended permit tcp any host 100.100.100.2 eq 3389
When I view the logs it is reporting the following:Inbound TCP connection denied from 206.100.100.1 (external IP) to 100.100.100.2 /3389 flags SYN on interface outside.Been pulling my hair out with this one as I believe I have everything configured correctly.
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Jan 18, 2011
what is the purpose of the "Permint all traffic to less secure networks".
Well I know the purpose and the technique to handle some sercurity level is nice. when I cannot add add a rule without deleting this implicit rule?
The technique of security level is then obsolete?
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Apr 24, 2012
I have a computer behind the ASA 5505 firewall. The computer needs to access Microsoft Activation Server. Reading some website information, I need to allow a huge list of servers that basically points to www and https traffic. Therefore, looking at this heavy requirements, I prefer to allow this computer to navigate to any https or http (www) server outside of the firewall.I have included my current asa 5505 configuration. [code]
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Jun 10, 2013
when I click 'Create...' under Access Policies > Default Network Access > Authorization, and then press the 'OK' button, it says 'Please configure at least 1 condition.' However I have no way to configure conditions as the 'Conditions' text is just bold text and not a link or any sort of configurable area. If I go to 'Customize' on the bottom right and add conditions to the right list box, I still have no options when I press Create. Also, the 'green light' next to Default Network Access is grey with a line through it. This is the most cryptic system I have ever used
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Mar 3, 2011
Using a DIR-655, does anybody know how to create a firewall rule to block all dns requests except to specific servers?
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Mar 7, 2012
Our external security department needs to scan, every three months, a computer behind the firewall. I need to create a simple NAT rule that will allow an ip address or subnet to the computers behind the ASA 5505. At the moment, we have a simple NAT rule which allow all network traffic to exit from inside to outside.
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Mar 30, 2011
I have an asa 5505 and I would like to adding a new rule for a network, however it was added, it seems it would be inactive. I have two inside network,192.168.12.0/24 (name: lanA) and 192.168.99.0/24. (name: lanB) I have the following in the running-config:
access-list lanB_acl line 1 extended permit ip 192.168.99.0 255.255.255.0 any
access-group lanB_acl in interface lanB_interface
But when I tried to reach a host in the lanA, the packets are dropped. I configure the asdm, which shows this on the LanB interface:
1 lanB_network | any | ip | permit (hits 344)
2 any | any | ip | deny
and I checked the packet tracer with: tcp, source: 192.168.99.57:10460 dest: 192.168.12.2:443 and it shows that the packet has been dropped by the last 2. 'implicit any any ip deny' rule, in spite of my access-list rule (access-list lanB_acl line 1 extended permit ip 192.168.99.0 255.255.255.0 any) preceded it, and active.
The lanB and lanA interfaces are the same security level 100, and I can reach the outside/internet from 192.168.99.57 Is it possible that I have to reload the rules or something like in order to apply? Or I missconfigured something?
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Jul 23, 2011
I picked up a rather nasty bit of malware which resulted in a format and installation of Windows Ultimate 64, all well now except i cant get the wireless to work, downloaded assorted drivers from the dell support directory but to no avail, so questions are-:am i missing something obvious (windows function button for wireless does nothing)what is the correct driver for the N5040 and are there any tricks in getting it to work.
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Jun 3, 2013
I have a server behind an rv042 that i would like to block access to on one port from outside in. I have configured the rule as follows:
priority = 1. policy name<name>. enable<checked>. action = deny. service <service to block>. source interface = wan1. sources = any. destination = <public ip address of server>. day <nothing>.
This does not block the intended port from outside. I also changed the destination to be the private ip address and i changed the source interface to LAN and to *. What is the correct syntax to do this?. Port forwarding is enabled. I noticed that there is one entry in the forwarding table for the public ip but it is going to a dead private ip address. Would this have an effect?
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Apr 17, 2011
I am creating access rule on a ASA5520 running ASA 8.2 (1) and ASDM 6.2(1) and found that the GUI has less option then when creating access rule on a ASA5505 running ASA 7.2 (3) and ASDM 5.2(3) (see attachment). Is there an option that enables me to get the same configuration options on the ASA5520 running ASA 8.2 (1) and ASDM 6.2(1) as I have on the ASA5505 running ASA 7.2 (3) and ASDM 5.2(3).
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Oct 13, 2011
I have a PIX with 600 active access rules but many rules arent't in use. A lot of the rules aren't necessary anymore but I don't know what they are. How to know what rules are working?
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Jul 24, 2012
on my Active/Stanby ASA5505 has Sec+ License(trial), I can't create more then 3 nameif interface however,
Licensed features for this platform:
Maximum Physical Interfaces : 8 perpetual
VLANs : 3 DMZ Unrestricted
Dual ISPs : Enabled perpetual
VLAN Trunk Ports : 8 perpetual
Inside Hosts : Unlimited 17 days
Failover : Active/Standby 17 days
VPN-DES : Enabled perpetual
VPN-3DES-AES : Enabled 17 days
AnyConnect Premium Peers : 2 perpetual
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Aug 13, 2012
Got an ASA5505 connected to another endpoint running IPsec and being NAT'd at each end to a 10.0.0.0/24 network. I can pass other types of traffic through the ASA 5505 but not RTP traffic. The moment it is NAT'd and hits the firewall rules it gets denied by the default deny at the bottom of the list.
Currently the rules are as follows
Incoming External
allow ip any any
allow tcp any any
allow udp any any
default deny
[code].....
It wont allow us to setup a voip call...however when the same call manager sets up a voip call NOT using this ipsec tunnel it works just fine.
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Jul 3, 2011
After upgrading to 8.4(2) and ASDM 6.4(5) I seem to have an extra access rule duplicating an existing rule, this is only visable through the ASDM. When using the CLI you can't see this duplicate rule.
I therfore get the following warning everytime I make a config change using the ASDM [code] If I delete this rule it returns everytime I launch the ASDM!
I also have extra config under Firewall>Configuration>Public Servers that I didn't have before. If I delete it, again it returns.
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Jun 23, 2011
I need to block incoming traffic with Dlink DIR 600. I know how to create the rule source (WAN) to destination (LAN) to deny all protocols. But what IP will I put in WAN? IP address of my Internet? Or how can I enter the ALL IP range in source...format for the IP (it's not 0.0.0.0).
I want to do this because in the DIR log section I'm being PING Flooded. I already un-check "Enable WAN Ping Response" but still receiving the message.
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Jul 11, 2012
I have a Cisco 5505 with a security plus license and but I can’t seem to create sub interfaces on it.
ASA1(config)# sh ver
Cisco Adaptive Security Appliance Software Version 8.2(2)4Device Manager Version 6.0(3)
Compiled on Wed 03-Feb-10 14:17 by buildersSystem image file is “disk0:/asa822-4-k8.bin”Config file at boot was “startup-config”
ASA1 up 1 day 18 hours
Hardware: ASA5505, 512 MB RAM, CPU Geode 500 MHzInternal ATA Compact Flash, 128MBBIOS Flash Firmware Hub @ 0xffe00000, 1024KB
[code]....
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Jun 12, 2013
I have a production ASA 5505 that is working perfectly. I wanted to take a spare ASA 5505 and copy the running config to it so that I would have a backup unit that could be swapped out if the production unit went down.
Both units have security plus and running 8.2(1). The only difference is that the production ASA has 512MB of RAM while the backup ASA has 256MB. Also the backup has anyconnect and the production unit does not.
I copied the running-config to my tftp server and then copied the running config from my tftp server to the backup ASA as startup-config. After reload the device booted with an identical configuration to my production ASA, but after swapping out the units to test it, I have no access to the WAN or DMZ from my LAN. Swapping back to the production unit and all works as it should.
I printed out the running config from both devices and compared them line by line. They are identical except for the anyconnect line on the backup ASAs config file.
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Feb 21, 2013
we have a cisco asa 5505 and it working great .i want to create web server that only selected public ip address can access.
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May 17, 2011
I have a customer an exisiting 5505 which connects to multiple sites for a site-to-site VPN. This firewall was not installed by myself originally I have just been asked to take a look now.The situation is that we now need to edit one of the existing site-to-site VPNs to include the remote sites expanded network. I have tried doing this through the ASDM and have found that I cannot add new network objects. I have tried creating a new network object group and then added the new networks from there but I am completely unable to add the new objects.I believe a picture tells a thousand words in this case so I have attached some images which show the problem. I have also tried going through the VPN wizard, this also does not allow me to add new network objects.
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Nov 7, 2011
trying to configure our ASA 5505 (hence my request for the ASDM). However, I can go CLI if push comes to shove.
What I'm trying to do is allow a range of IP addresses on the inside interface (those which the DHCP server is doling out IPs which are XXX.X.XXX.14-140) to access email only (which is hosted offsite). They still need to access the file servers which are on the inside but nothing should be going out to the internet other than email.
I believe I have to create a Network Object which contains the IP range I wish to restrict. I can see where I add the Network Object but I don't know what the syntax should be to specify the address range.
I'm also not sure what the sequence of the ACLs should be and whether or not I can keep the default Access Rules in place. There are the two implicit rules: 1) Permit any traffic out to less secure networks 2) Deny any traffic to anywhere (which is superceded by rule 1, yes?)
To create an Access Rule like the one I desire, do I need to move the two existing rules down the list so that the new one will supercede both implicit rules?
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Dec 10, 2011
I have a Cisco RV042 Wired Router. I've got a static IP and a MS Small Business Server in my Router Network. I have forwarded the essential ports to use the IIS and the Exchange Server of my SBS2011 (HTTPS, HTTP, smtp, rpc). I have also created some access rules for these ports, but I don't have any access on my server services, if the firewall is activated.
Here are my Firewall Access Rules from the RV042 Web Interface:
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May 8, 2012
I have a newly aquired asa 5505 that I just set up to the bare minimum configurations. I followed a cisco paper on how to create a "remote access vpn" setup for ipsec. I can sucessfully connect and establish a VPN, but when I try to access an inside resource from the vpn address, the asa blocks it.
Specific error is: Code...
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Mar 20, 2012
I just upgraded my firewall to ASA 5505. Now, my original static ip address cofiguration is gone. Apperantly, Cisco went away from static ip address to something like nat (inside,outside) dynamic interface. how to create a static ip address under version 8.4? By the way, I am sharing what my configuration used to look before upgrading.
!
hostname cisco-asa
domain-name default.domain.invalid
names
!
interface Vlan1
nameif inside
security-level 100
[code].....
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Apr 19, 2012
I'm trying via the ASDM to port forward http connections to a DVR for the purpose of viewing IP cams.I've tried via ASDM to create a public server but I'm not allowed to use my public IP address for the public Interface.I have only one public IP address available.Is there any way round this ? I would also like to know how I can enable NAT with PAT.I've tried setting the outside Interface for use with PAT but It keeps reverting to the setting for a range of external addresses.I'm not really used to the ASA cli yet , I'm getting there.If there's a workaround via the CLI , I'll take that route.
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Feb 27, 2011
We have an Asterisk/FreePBX phone system located behind an ASA 5505 device where we are having problems with sip inspection.
We connect to three different phone providers, and things works as expected for 2 of the 3 providers,but for the last one (Draytel) we are having problems with sip inspection.
The key difference about the VoIP provider where we are having problems is that they are using differetn servers for the voice (RTP) traffic than the server we are registered with to establish SIP sessions.
sip inspection is configured with the default out of the box options.The problems we see are this:
1. For ingoing calls sip inspection does not open the required pinhole to allow the traffic to flow through. As a result we can not hear the voice of the calling party, but voice from our side is passed through ok.As a workaround we have added and ACE allowing traffic in the used UDP (RTP) range from this VoIP providers ip addresses to pass through the ASA, and with that in place incoming calls work.
2. Outgoing calls doesn't work because sip inspection doesn't kick in, and as a result of this we forward internal ip addresses in the SIP / SDP body to the VoIP provider. I'm not sure whether this is a consequence of sip inspection not kicking in for this provider, or a result of having added the ACE for an ip ragnge that covers the ip address we register with.
As stated above sip inspection does work as expected for two other providers where all traffic goes through a single server.We actually have had this working with ASA firmware 7.2(4), but as that version intermittently had a problem where sip inspection would stop working (fixable by power off/on or a clear command), then we decided to upgrade.
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Nov 28, 2010
My asa5505 frequency restart and create a crash-infor file.
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Sep 23, 2012
Is there a module or way to create a Guest Access Lobby on the ASA 5525? We currenly leverage the WLC to do this for us, but are moving to a routed access enviornment which is causing some issues. We would like to offload the guest access responsibility to the ASA if possible.
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Aug 23, 2012
The old syntax that I am much more familiar with has been deprecated. On older IOS it would have been something like static (inside,outside) tcp 209.114.146.122 14033 192.168.30.69 1433 netmask 255.255.255.255 Plus an extended ACL to allow the traffic.I am trying to create a Static PAT to allow a host address to access our Network through an ASA. I have external address 209.114.146.122 that I want to hit the external interface on an obscure port (say 14033) and translate that traffic to an internal host address on port 1433.
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Apr 8, 2012
I am a novice with networks but do have a fair understanding of networks. I have a small business network, utilizing a RVS4000 router (Firmware V2.0.27)I am attempting to set up firewall rules to block certain web sites at certain times.I have successfully set up rules using source and destination ranges, to deny service 24 hours a day everyday.
However and here is the problem when I attempt to edit any of the rules (I want to change the time to certain hours of the day) it allows me to edit the rule but when I attempt to save I get an error message up saying there are invalid characters and it will not save the changes?create the whole thing with the changes I want it works fine, is this a known bug?
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Apr 5, 2013
I have sent up a wireless network in a large building using WAG120N Modem Router and four E1000 wireless routers set as access points. The E1000's have the DHCP switched off to enable roaming so the WAG120N takes care of all that.
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Apr 1, 2013
I'm trying to troubleshoot an ASA5505.
The original goal was to block "Mumble/Murmur" (a voip app) traffic, which runs on TCP/UDP 64738, both inbound and outbound, except to a certain host (63.223.117.170).
However, when nothing I tried seemed to make a difference, just to troubleshoot, I decided to try blocking all inbound traffic. I first disconnected ethernet port 0/0 to ensure that it was cabled correctly and the outside interface went down when I did. That worked as expected, so I confirmed I had the right interface and it was cabled correctly.
I then applied a "any any deny ip" rule as the first element in the outside interface access_list, as you can see below. However, it appears to have had no real effect and the hit count is very low (it should be astronomical).
show ver
Cisco Adaptive Security Appliance Software Version 9.0(2)
Device Manager Version 7.1(2)
Compiled on Thu 21-Feb-13 13:10 by builders
System image file is "disk0:/asa902-k8.bin"
[Code].....
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Aug 14, 2012
Got an ASA5505 connected to another endpoint running IPsec and being NAT'd at each end to a 10.0.0.0/24 network. I can pass other types of traffic through the ASA 5505 but not RTP traffic. The moment it is NAT'd and hits the firewall rules it gets denied by the default deny at the bottom of the list.
Currently the rules are as follows
Incoming External
allow ip any any
allow tcp any any
allow udp any any
default deny
[code]....
It wont allow us to setup a voip call...however when the same call manager sets up a voip call NOT using this ipsec tunnel it works just fine.
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Jul 27, 2011
I accidentally setup two schedule rules both with the name of "Log". When I highlight either rule, and try to delete either, I get error "The rule is being used by another rule and cannot be deleted" How do I delete?
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