I need to allow a specifc hostname through my firewall. I found this article: [URL] But it's only for 8.4 updated ASA's and above.
Doing more research, I found this article: [URL] And have been trying to reverse engineer it. Am I on the right track?
I am trying to unravel a ASA 5550 config that has been created over several years, by multiple people, some who used ADSM, some who used CLI.
None of them ever removed any lines from the configuration, and none did any documentation. When examining the actual configuration from a CLI perspective:
1. Does an ADSM- created access list end with any specific ADSM- added suffix?
2. When ANY access list is created in an ASA 5550, does it HAVE to be included in the access-group command to be functional? Can it also be functional if referenced in a "nat" command?
3. If the access list does meet either of the criteria specified in question #2, is it completely non-functional?
4. If an access list is applied to a logical or physical port that is shut down, is the access list functional?
I am using a Pix 515 with IOS 8.0(3).I have in my access list on the outside interface.......access-list outside_access_in extended permit icmp any 12.23.34.0 255.255.255.0 echo access-list outside_access_in extended permit icmp any 12.23.34.0 255.255.255.0 echo-reply.......in order to allow ping requests and ping replies into my inside network. This certainly works since I can ping the inside from outside and vice versa, but in the ASDM display of access rules, the hit count for these two lines is always zero. If I run 'show access-list', the hit count for these lines is non-zero.
Why doesn't the hit count show up in the ASDM gui display?Also, I have read that the PIX does not treat ICMP in the same way as TCP or UDP and there is no stateful behaviour towards ICMP. However, if I set up a continuous ping from outside to inside and then disable the above access list rule allowing echo requests towards the inside, the ping continues whereas I would expect it to stop.
In the config there is 'timeout icmp 00:00:02' if there is no stateful connection for ICMP, why is there a timeout value for it?
I have been told that if an access list is created with the suffix _access_in, that if the preifx is the name of an interface, then that access list is automatically bound to that interface, even if there is no explicit command doing that. I looking at the config of an ASA 5550.
example:
Interface is Production
access list is called Production_access_in.
Is that access list automatically bound to the Production interface, even though it does not show up in any other commands?
Yesterday, I configured ASA via CLI for Static PAT and created some entries in an access-list. I will be testing that setup this evening.
However on a quick double check of the settings on the device via ASDM I could not see the acess-list settings. I searched every tab and found nothing so I PuTTYed into the device and checked the running config. The rules I created were right there. Is this something I should expect? If so doesn't it defeat the point of having a GUI if it does not show a complete running config?
I have new DIA Internet service coming in and unlike the last vendor who provided a router, I am configuring my own. This is my first full Cisco config - I've been looking at this for 3 days now. I have SIP signalling, rtp and default traffic on a (3) t1 multilink (4.5mb). My lan and firewall uses dscp tags and passes them to the 1841 for outbound. The ISP only prioritizes by destination address so I just need the 1841 to respect the tags internally. Inbound, I have only port numbers to go by to differentiate voice traffic and I want to tag EF and CS3 accordingly for use by the 1841 and the rest of my network.
Below is part of my proposed config. I have read tons of Cisco docs and looked at all the queuing methods and this one I understand the best. I am getting the error: "CBWFQ : Can be enabled as an output feature only", so I presume that something is wrong on an input definition somewhere. For now all the firewall functions are done at the actual firewall (Sonicwall NSA) so other than limiting ports to the PBX everything else is just pass-through. Any changes required. IOS is 12.4(4)T1.
[Code]....
i have a stack of 3750 (WS-C3750G-24TS-1U with IOS 12.2(53)SE2).
This is the conf I have:
!
class-map match-all DC_SC-to-DC_UW
match access-group 100
[Code].....
I've got a Cisco 1841 with 2 FastEthernet ports here. My Cisco isn't great, and I've been given a problem I don't seem to be able to crack.Essentially, I have one network with two sides. I've connected these to fe0/0 and fe0/1 on the router, and put them interfaces into a bridge group which as far as I can tell, essentially makes the router a 2 port switch...I know this won't make a lot of sense from a normal network point of view, but what we need to do is allow all traffic from fe0/0 to fe0/1, but not allow any traffic in the reverse direction. The traffic allowed to flow from fe0/0 to fe0/1 must include broadcast traffic (infact that is the most important traffic, its how the silly theatre application works). None of the traffic is IP addressed.... ie, each of the devices on the network assign themselves an IP address, and then throw broadcast traffic out on to the "dedicated physical network" that exists between them for communication[CODE]
View 2 Replies View RelatedI have started to use ip extended access-lists on several 3750X-switches to filter inbound and outbond traffic on the VLANs. But it seems that the use of object-groups is not supported, is this correct? Is it really no way to group different ip-addresses into groups and then use these groups in the access-lists?
I am running sw version 15.0(1)SE2.
My network topology consists of 3 directly connected routers where the central router contains sensitive data and i need to block traffic from ENTERING the LAN adjoined to that router. My issue is creating an access list to DENY traffic from entering the network connected to Fa0/1 but ALLOW traffic to exit from that network. I am using one class C network which is subnetted 7 times to provide me with the required LAN's.
View 2 Replies View RelatedI want to configure accesslists on my Catalyst 3750X-switches to protect different VLANs/networks. Any best-practices about inbound versus outbound accesslists? In my head it is more readable and easier to understand the config when accesslists are assigned outbound on the VLAN to protect instead of assigning them inbound on all possible source-VLANs. But of course, from a performance point-of-view it is better to use inbound access-lists to avoid un-necessary routing etc.
View 1 Replies View RelatedI have some problem with the ASA 5510 ver 7.0(6). My manager wants to keep this as backup. tried lots of things but still users not able to access internet nor can i ping anywhere.For example when i ping 4.2.2.2 i dont get any reply.The runing config is below for ur ref :
HQ-ASA-01# show running-config
: Saved
:
[Code]......
upgrading our small office network. We currently have about 75 employees with probably 125 devices on the network. I'd like to create about 10 vlans for the different departments and then configure intervlan routing as needed. Currently we have all unmanaged switches and it's just a huge broadcast storm on the network. We are upgrading our Cisco 800 router to an ASA5505 sec. Plus license. I need some recommendations on switches. Of course, this needs to be done as cheap as possible.... Is there a way to use the ASA to configure all the vlans and intervlan routing and access lists and use a cheaper switch to provide the access layer to hosts?
View 4 Replies View RelatedI have one 2621 router i want to creat time base access list so that one of my subnet user(10.128.194.0 255.255.255.128) use only internet between 11am to 2pm.
View 15 Replies View RelatedThis is my first time to use the Cisco ASA 5500 family. I have a request from a user to create an access rule, to allow all LAN traffic to Destination IP address 165.241.29.17, 165.241.31.254 with Destination TCP port 5060,5061,5070 and UDP port 50000-52399.
View 9 Replies View RelatedI'm setting up a bunch of VPN tunnels for a customer of mine. Because we want the ability to fail over tunnels manually and to change IP addresses in the future without having to reconfigure both sides we want to build the VPN tunnels to hostnames instead of IP addresses.[CODE]
View 4 Replies View Relatedi installed the Cisco Prime LMS widget and see there is a choice to search by username and hostname and phonenumber (for IP phones?) how can this be set up?
View 1 Replies View RelatedI have a new ASA 5510 firewall, the objective is to set up a DMZ zone. my problem is I can't access to the web server in the DMZ from outside
DMZ ==========> outside OK
INSIDE ==========> DMZ OK
DMZ ============> Inside OK
OUTSIDE ==========> DMZ NOK "FAIL"
I put in attachment the running-config file.
I've just installed a 2504, upgraded the firmware so that 3602i ap's can attach. As a test I left the network open and am running dhcp from the 3560 switch. Why am I unable to ping or connect to a device by name within the same subnet on the "wired" network? There's no DNS server.
View 2 Replies View RelatedRecently powered down device (transformer overhaul) and when it booted back up, unable to access with ASDM, SSH...can access directly using HyperTerm, but have only limited commands...will not accept known user/password credentials. When I issue 'show flash' I can see that there are upgrade_startup_errors.log files, but cannot access them.
View 5 Replies View RelatedIs there a way to access the asa in a failover pair that is in standby mode from the primary asa? IE I am logged into the primary asa via command line and was hoping to access the other asa from here.
View 1 Replies View RelatedI can't seem to get internet access working from the DMZ network through our ASA 5510. PCs on the DMZ can ping the ASA but can't get out to the internet.I will attach a (cleaned) configure.
View 3 Replies View RelatedI need the ssh access on my ASA outside interface and have added
ssh ipremoved 255.255.255.255 outside access-list acl_outside extended permit tcp host ipremoved any eq 22 but this is the log i get from ASA
Oct 06 2012 16:10:04: %ASA-3-710003: TCP access denied by ACL from ipremoved/39884 to outside:ipremoved/22
Cisco Adaptive Security Appliance Software Version 8.2(5) Device Manager Version 6.4(5)
I can get access to the internet from the ASA 5510 itself and that is confirmed via pings. However, anything behind the ASA does not have internet access, on any VLAN/sub-interface. I've attached my running-config.
View 2 Replies View RelatedI have DMZ n/w 192.166.0.0/24 on which i have nated on public ip
-private ip : 192.16.0.201 (OWA)
-public ip : 61.x.x.x.
when i try to access owa(public ip ) from dmz it is not allowing , From what rules i need to set to get work ASA 5510 8.2
the set-up is: a DSL modem in half bridge (it does all the PPPoE connection) passes our static IP (55.167.x.x) to the ASA's outside interface ... (the modem has an IP of 192.168.1.1, but not sure this matters)
then I have one inside interface on 192.168.43.1, which connects to a server and we have a working site-to-site VPN between this server and a client.. so I know most of it's set up right ... nothing else is on the 192.168.43.0/24 network.
the management interface is on 200.200.1.0/24 so it's out of the way and incidentally connected to a dedicated PC, which also has console access via the blue serial cable.
the last interface Main_Network is on the 192.168.0.0/24 network and it's this that I'm trying to get to work... at the moment I just have one Windows PC connected directly (does it need to go through a switch?) into the ASA for testing with a static IP (192.168.0.72), but I can't ping anything outside from the PC... only the ASA's interface (at 192.168.0.30).. I have the gateway on the PC set as 192.168.0.30 by the way.
The ASA can ping all the inside machines and anything I like outside.
Here's my config ... the static routes are there for when this replaces the current modem/router and the whole network plugs into the ASA.
ciscoasa(config)# show running-config
: Saved
:
ASA Version 8.2(5)
!
hostname ciscoasa
[Code]......
I lost the ability for my Web server (or any servers in the DMZ) to access the Internet. However, the Web server is still being used fine from the Internet. Here is my config
ASA Version 8.4(2)
!
hostname xxxx
domain-name xxxxx
enable password xxxx encrypted
passwd xxxx encrypted
names
[code].....
I bought ASA 5510 about a week ago, very basic configuration and my priority was and still to get access list inbound the outside “Security Level 0 “so I can access my web server from the cloud but unfortunately I could not make it work (((TCP access denied by ACL from 92.40.X.X/52511 to outside:81.108.X.X/80))). ••à>> 92.40.X.X is a pc from the cloud that I used to access my web server and the 81.108.X.X is my public ip address My recent Conf is as follow:
Nat Section:
==================================================================================
Dynamic:
nat (inside,outside) source dynamic any interface <<<To have the PCs that inside the Network to have access to Internet>>>>
[Code].....
When i create a rule and enable icmp in ASA inside to outside direction to testing purpose, but I can't ping outside address ,
access-list ICMP extended permit icmp any any
access-group ICMP in interface inside
LOGG:::
ping 8.8.8.8
%ASA-3-106014: Deny inbound icmp src outside:122.255.3.1 dst inside:202.124.160.1 (type 0, code 0)
%ASA-3-106014: Deny inbound icmp src outside:122.255.3.1 dst inside:202.124.160.1 (type 0, code 0)
then I have permitted icmp for return path then it works, configs and logs are followed,
access-list ICMP extended permit icmp any any
access-group ICMP in interface outside
LOGG:::
ping 8.8.8.8
%ASA-6-302020: Built inbound ICMP connection for faddr 122.255.3.1/0 gaddr 202.124.160.1/14 laddr 192.168.1.1/14
%ASA-6-302021: Teardown ICMP connection for faddr 122.255.3.1/0 gaddr 202.124.160.1/14 laddr 192.168.1.1/14
We have a brand new Linksys X3000, with the latest firmware installed. It does not recognise the hostnames of devices on our network. We have added a few hostnames, using 'manually add client'. My first question is why would it not recognise hostnames (a variety of devices, e.g. phones, apple time machine, linux PCs)?
The next problem is that that we are successfully able to ping IP addresses, but when we ping hostnames, results are inconsistent. e.g. currently I have my laptop and a time machine connected by wire directly to the router. I can ping the time machine by IP. The first time I ping by hostname, it works, but immediately after that I ping again and it says 'unknown host'. Why would it suddently forget about a device it is clearly connected to? Have we got some sort of default security setting I don't know about?
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
We currently have one Cisco ASA 5510 firewall at our mailn office. Our firewall does not let users access the internet. We currently have a web proxy that lets users access this. I need to let users access one website through the firewall without going through the firewall. I believe this is possible if I use dynamic NAT.
View 1 Replies View RelatedI have a mail archiver (hardware device) in my network that I need to access to from the Ipad/iphone. There is an app for it but I have to allow the access on the ASA. I created an 'object' for the device and added a Static NAT entry for it, then added an access rule. Its not working so I am guessing I did it wrong. The device uses port 8000 which I also added to the object. correct commands, or using the ASDM works too.
View 1 Replies View Related