Cisco Firewall :: PIX 501 With 1 Static IP / NAT / PAT With Access List
Aug 24, 2011
I am having a problem getting this to work and I have always done it with 2 Static ip address. but now this company changed to 1 and I am doing something wrong.
I have comcast with 1 static IP, I have a local LAN with 6 host and 1 server that does Mail and remote access and web traffic.
I need a config that allows me to use 1 static ip on the outside interface of the PIX and allow with an ACL 7 ports open to the server and allow all the local host out to the internet.
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Aug 15, 2012
I am having difficulty following the logic of the port-translation. Here is the configuration on a 5505 with 8.3,So I would have thought the outside access-list should reference the 'mapped' port but even with 3398 open I cannot remote desktop to the host. If I open 3389 then I can connect successfully.
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Aug 14, 2012
I configure multiple static RPs and one of the ACLs denies a source will it move on to the next entry that covers it in another acl? [code] i.e. 1.1.1.1 will be used as the RP for 224 to 238 and 2.2.2.2 will be used as the RP for 239.Will that work correctly, i.e. if a source is trying to register with the router and its for the group 239.1.1.1, will it be denied against the first RP and then permitted against the second RP?
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Feb 23, 2011
I have a question about access-lists on ASA: (5520 running 8.4)Often I want to permit all traffic from networks behind an interface (let's say DMZ in this example) to Internet, but NOT to internal networks. Then I first configure a Deny from DMZ to all internal network and then a Permit to ANY. If I forget the first Deny I will allow all traffic also to my internal networks. Is it possible to configure an access-list that permit all traffic from a network to all networks that are reachable via a given interface? In this example: Permit all traffic from DMZ to all networks that are reachable via the Outside-interface? This should permit traffic to Internet and deny traffic to internal networks in one statement.If I specify the outside-interface as the destination only traffic to the interface itself will be allowed.
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Apr 2, 2013
I have a router in front of a few firewalls on an internet link. All traffic from the inside network must go through one of the firewalls to get out through the router and similarly there is a dmz on one of the firewalls.I am trying to make sure the router is fully hardened.Should I apply an access list on the outside interface of the router along with the access list for management access?
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Oct 30, 2012
Trying to figure this all out. I'm getting untranslated hits. I posted the config I have so far.
Code...
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Mar 11, 2013
This is a working example using static. But it doesn't work with the dynamic interface or I'm doing something wrong. Need to get rdp access to my laptop.
ASA Version 8.4(5)6
!
hostname ciscoasa
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
[code]...
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Jul 1, 2011
I need to configure the access list on the outbound internet port to accept the following:
ip access list 10
access-list 10 permit PPTP vpn any xxx.xxx.xxx.xxx
access-list 10 permit RDP any xxx.xxx.xxx.xxx
access-list 10 permit FTP any xxx.xxx.xxx.xxx
access-list 10 permit Postgresql any xxx.xxx.xxx.xxx
access-list 10 permit MacARD any xxx.xxx.xxx.xxx
This method does not work on the Cisco 2921 router with FW
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Feb 26, 2013
So in the past from 8.2 down I had one to one NATs like so
static (inside,outside) A.A.A.A B.B.B.B netmask 255.255.255.255
but for 9.1 im running now I need to do this
object network obj-B.B.B.B
host B.B.B.B
nat (inside,outside) static A.A.A.A
So if I make an ACL to permit outside public access to the public IP (A.A.A.A) in 9.1 do I use real B.B.B.B ip address or the object itself obj-B.B.B.B?
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Mar 4, 2012
On firewall we have zone created for dmz and ip is 192.x.x.x and it is connected to 2950 switch(DMZ switch) with vlan 25..We have L3 switch on this we have created vlan 25 and connected cable from L3 with 2950 switch with vlan 25
As we have the servers on L3 and wanted to bring on dmz zone we have connected a cable.Now the problem is when i connect a pc on 2950 switch (directly on dmz switch) with access-list below we are not geeting any hist on it.
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Apr 5, 2011
How to designate access-list for the remote access vpn users in order to let them access specific subnet or host,asa 5510 and acs is in the picture
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Sep 14, 2011
I'm trying to configure an extended access list on one AS5350XM but I get one way hearing on a voice calls and I can't determine why (please see the attached diagram). There is an OSPF running on both gigabit interfaces and the Loopback address is also advertised (it is actually the voip IP address). The access list is applied on both interfaces in the inbound direction. There is another gateway with IP:4.4.4.4 (no firewalls here) and the routing between gateways is working properly.
Here is part of the access list (applied on AS5350):
.
.
permit ip host 4.4.4.4 host 3.3.3.3
.
.
When I review the log of the AS5350xm I see many errors like this one:
%SEC-6-IPACCESSLOGP: list example denied udp 3.3.3.3(16638) -> 4.4.4.4(18094), 1 packet
So how it is possible to see this error since the access list is in inbound direction and the IP address (4.4.4.4) is open. I don't have problems when I do telnet or ssh from 3.3.3.3 to 4.4.4.4.
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Mar 22, 2012
I am unable to remove an access list. Currently this this access list contains 4 lines of remarks. I was unsure if I was entering the command correctly and now I have 4 lines of "trash" that needs to be removed.
Symptoms:
The "sh run" command shows that I have access-list 100 defined.
The "sh access-list" returns nothing.
Process I have tried: config t
no access-list 100
no access-list remark Test (just trying anything at this point)
clear configure access-list 100 (This returns "Invalid input detected at '^' marker" and the '^' is under the 'e' in clear.)
So the "clear configure" command is not working. The "no access-list" commands does not return an error but does not remove anything.
What step am I missing? Let me know if I can provide any more information.
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Jan 4, 2012
ASA 5505 vlans routing & access-list?
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Apr 24, 2011
I have just upgraded a ASA5510 from 8.2 to 8.3 using migration tool.All seemed to go well, still double checking the config as this is a bench test of upgrade prior to filed upgrades.
Anyway one thing that is slightly frustrating is that the migration has expanded all of my access-lists, so we maybe had 10 lines of config relating to access-lists based on access-groups, now we have hundreds of lines.On ASDM this is bad enough but on CLI with show run its a bit of a bind.
Is there any way to un-expand the access list or do I simply delete and start again using my access groups.
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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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Jun 27, 2011
I have very strange behaviour on my Cisco 2801 router when I applied access list on wan interface.
Architecture:
SIP Provider <----> Cisco 2801 <-----> CUCM 6
Problem:
We are using Cisco 2801 as Voice gateway for CUCM 6. so only one purpose of this router is just receiving calls on sip dial-peer and transfering to internal network.
If you look on access list below, if 'log' words don't present on these 2 lines, access list didn't work. Problem with it is that when I establish call from us or to us I can't hear incomming RPT stream, but other side can hear me. But when I type word 'log' there, everything stars working immediately.
Cisco 2801 IOS version:
Cisco IOS Software, 2801 Software (C2801-ADVENTERPRISEK9_IVS-M), Version 12.4(6)T9, RELEASE SOFTWARE (fc2)
[Code].....
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Mar 14, 2013
I created some acess-lists, and you can assign a logging level to this access-list. Now this ACL has a lot of hits, so i want to see whats happening. Only the log I then see is completely empty. I cannot figure out how to get some info in that log.
I think there is some global logging setting i probably need to enable in order to get anything logged at all, but i cannot figure out which.
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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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Dec 10, 2011
I am trying to remove a line in a particular access-list configured in a FWSM module using this command "no access-list <acl> line 19 x x x x" but it doesn't work. See below:
FWSM/xxx03(config)# no access-list ?
configure mode commands/options:
alert-interval Specify the alert interval for generating syslog message
106001 which alerts that the system has reached a deny
[code]...
How can I remove a line from the access-list without clearing the entire access-list?
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Sep 10, 2012
I'm configuring a 5505 for a remote office. Until they are assigned a static ip by the provider I will have to use the providers dhcp address. How do I construct an access list for the outside interface using the external address if I don't know it yet? is there a commnd that will insert the ip address in to the access list once one is assigned?
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Jul 15, 2012
I have 3 3560 switches which are configured with trunks between them. They run vlan 10, 11 & 12. I have a 'core' switch (switch 1) of these 3 to which an MPLS router is connected on vlan12. I in addition have another switch hanging off the 'core' switch via a routed link (switch 4). I have EIGRP configured as a stub and as such the IP address on the routed link at the core switch end is of a /24 from v lan 1 on the other switch. This makes the route directly connected and therefore distributed via EIGRP stubs. Switch 1 is then exchanging routes with the MPLS router (via EIGRP).
The problem I have is that from any sub net on any switch (switch 1, 2 or 3) I can ping 192.168.13.1 (switch 4). When I try and ping switch 4 from over the MPLS I am unable to. If I trace to the switch I see it reaches the outside of the MPLS router, but is then unresponsive. The same applies if I try to ping switch 1 on 192.168.13.2. Any of the other IP addresses of switch 1 respond.
The MPLS network is a managed solution to which I have no access. I'm told that the MPLS provider is able to ping switch 1 & switch 4 on the 192.168.13.x addresses from a remote router (192.168.32.2). I have tried from a switch on the same L2 sub net (192.168.32.1) and I don't get a response.
From switch 4 I am able to ping the switch on 1 of it's interfaces (192.168.19.1), but not the interface I mentioned above 192.168.32.1. There are no access lists in place on the switches and no firewalls between the sites.
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Nov 7, 2012
I have an ASA pair configured to replace a router that hosts a collection of IPSec Tunnels. Tunnels appear to work. I am lab'ing some additional controls that I would like to implement. On the Production Router that i plan to replace with the ASA's the current Tunnels are all wide open (all traffic allowed to pass). I was hoping to lock things down a little without having to reconfigure all of the Tunnels. My though was that an ACL on the Inside Interface blocking selected traffic Out (so into the LAN) should not impact the stability of the Tunnels but allow me to restrict some traffic from entering the LAN. One port that I was attempting to block is RDP 3389. When this ACL is applied to the inside interface it does not block Port 3389 at all. What am I missing? Is it that the trffic is being allowed because it is coming through one of my 'open' Tunnels?
Shouldn't IPSec Tunnel traffic be processed by the Inside Interface ACL just like all other traffic?
access-list 145 deny tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 3389
access-list 145 deny tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 135
access-list 145 deny tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 137
access-list 145 deny tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 138
access-list 145 deny tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 139
access-list 145 deny tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 445
access-list 145 deny tcp 192.168.30.0 0.0.0.255 10.187.10.0 0.0.0.255 eq 389
access-list 145 permit ip any any
ip access-group 145 out interface Internal
This work great on a 2821 Router, but not so much on the ASA.
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Nov 29, 2011
which current SB routers support these features known from RVL200 and RV0XX v. 1.X?:
Block MAC address on the list with wrong IP address
Block MAC address not on the list
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Aug 24, 2011
I have configured Static NAT on ASA 8.4; and opened the telnet access through following configuration but it is not working. What mistake I am making in my configuration
interface Ethernet0/0nameif outsidesecurity-level 0ip address 119.36.105.210 255.255.255.240!interface Ethernet0/1nameif insidesecurity-level 100ip address 192.168.117.1 255.255.255.0
hostname(config)# object network Router_A
hostname(config-network-object)# host 192.168.117.2
hostname(config-network-object)# nat (inside,outside) static 119.36.105.211
hostname(config)# access-list ACCESS-TO-SERVER extended permit tcp any host 119.36.105.211 eq telnet
hostname(confi)# access-group ACCESS-TO-SERVER in interface outside
The host (router) 192.168.117.2 can access internet after this configuration but telnet is not possible from outside.
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Sep 19, 2011
I've got an ASA 5510 that has been working like a charm for some time now. Until now we've not had to nat any resources to the outside. I created network objects for an internal host and an external host. The internal host has to respond to requests on tcp/2001.
The internal host has no problem accessing the internet, but when I attempt to access the internal host from the outside, I get the following:
4 Sep 20 2011 16:20:33 fw_outside_ip 62678 outside_host 2001 Deny tcp src outside:outside_host_ip/62678 dst inside_host:inside_host_ip/2001 by access-group "outside_access_in" [0x0, 0x0]
When I try to use the packet tracer to simulate the outside traffic, I get the following
5 Sep 20 2011 16:17:41 inside_host 2001 Asymmetric NAT rules matched for forward and reverse flows; Connection for tcp src outside:outside_host/1065 dst inside_int:inside_host/2001 denied due to NAT reverse path failure
I've got over my NAT statement and access rule and can't find anything wrong with either.
Here are the pertinent NAT and access rule...
static (inside_int,outside) tcp interface 2001 inside_host 2001 netmask 255.255.255.255
access-list outside_access_in extended permit tcp host outside_host host inside_host eq 2001
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Feb 9, 2013
I have configured the ASA in a very similar manner to how the PIX was set up but I'm having trouble with some hosts on the inside accessing the Internet. Any inside hosts which use DHCP work fine. Any inside hosts with a static IP (and configured on the ASA with a "static" rule) cannot access the Internet. For example, in the config below the server daviker-dialler cannot access the Internet. I've spent a few days working on this now and have started from scratch several times but I'm not getting anywhere. Apologies for all the X's everywhere, didn't like to post anything sensitive on the Internet.
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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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Nov 29, 2010
I am trying to allow telnet to port 551 but i couldn't get it to work.I am using a cisco 1720 router running on IOS 12.2.I am using the below commands to set the access list to allow access to port 551 using remote telnet to the Cisco router.hostname R1!interface ethernet0ip access-group 102 in!access-list 102 permit tcp any any eq 551.After i enter the above command the router will disconnect me and i will not be able to connect to it for awhile. Once the router is up i am still unable to telnet to port 551.
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Dec 20, 2011
How to implement mac access-list in 881 and 892 router ? As you now that we can get additional switch-port in the same router but I can't see the function in this router. I guess the switch port must function like the catalyst 2960 switch.
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Nov 20, 2011
I'm creating an access-list that will contain all networks and host that will be redistribute into EIGRP.Till now, this access-list contains 72 entries but this number can increase anytime.
I'm using a 3750-x layer 3 switch, and I'm wondering how big this access-list can be, regarding CPU and memory utilization and performance.
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Jan 17, 2011
we installed a cisco router in a school with two vlans (VLAN 1 & VLAN 2) VLAN 1 is for teachers and Admin and VLAN 2 is for students. We want so that VLAN 2 shouldn't be able to access any device in VLAN 1 but VLAN 1 should be able to access all devices in VLAN 1 & 2
VLAN 1 192.168.11.0/24
VLAN 2 192.168.12.0/24
I am using VLAN interfaces. I know we have to use some access lists but if i apply
access-list 100 permit ip 192.168.10.0 0.0.255 any
access-list 100 deny ip 192.168.12.0 0.0.0.255 192.168.10.0 0.0.0.255
With this access list two subnets can not access each other. How these access list should look likes ?
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Jul 25, 2011
I was reviewing some old configs at work today and noticed somthing weird in the access-lists. What is this?
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