Cisco Firewall :: Unable To Open SMTP Session Through ASA 5512-X?
Sep 20, 2012
Just doing some basic testing before we replace our ancient PIX 515E with a new 5512. I have a mini lab set up following the diagram below, although I am unable to telnet through to the mail server's netcat listener on port 25 TCP. I can ping all the way outbound from 192.168.101.1 to 10.0.0.2, and the 10.0.0.2 machine shows it is translated properly to 200.225.117.1.
NAT and access rules are as follows:
object network mail
host 192.168.101.1
description Mail relay
access-list inbound extended permit ip any host 200.225.117.1
[code]....
EDIT: Somehow the new global access rule is involved. When adding a permit any any in there I can get to the mail server no problem. When I remove it but leave in my permit ip any any on the outside interface, I am denied?
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Mar 17, 2013
I have created a VPN connection for ASA 5512-X by using the wizards and nothing seems to be wrong on the wizards's config.I am able to connect to the network by using the VPN but unable to ping internal network.Below is my config for your reference:
Result of the command: "sh run"
: Saved
:
ASA Version 8.6(1)2
!
hostname FAA-ASA-1
enable password crzcsirI44h2BHoz encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
[code].....
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Feb 19, 2012
I got a situation here for Nat-ed IPs i configured. I expected to open some ports on the interface to allow certain traffics to pass through, yet there are some of them are failed. Down is my current config.
object-group service DM_INLINE_SERVICE_1
service-object icmp
service-object tcp destination eq https
[Code]....
The only ports opened are 443, www, 3389 while ports domain, 5061,3478,3389. how to open domain, 5061, 3478, and 3389 ports on my ASA .
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Jul 25, 2011
This is my first post in CSC. I have two issues with ASA 5505. I have configured ASA to use Easy vpn (ASA as RA server). Users are able to connect to vpn with out any issue and there is no diconnections with VPN. But when the users are trying to RDP to server it connects and disconnect as soon as login. some time it connect for 2 mins then it fades out for some time then it reconnects again. I guess I have give correct access-lists. Please find the Running configuration in the below.
2). we have a Email server in DMZ zone and it users are able to connect to the email server and they can see the emails. But when they try to send any emails it just stuck in the email server queue and does not deliver to the destination.
ASA Version 7.2(3)
!
!
interface Vlan1
nameif inside
security-level 100
ip address intinside 255.255.255.0
[code]....
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Apr 18, 2013
I'm looking to make a possible configuration for a customer. They need a device to provide :- firewalling- bandwidth limiting based on protocols, IP, users- web content filtering- good reporting to see which device/users are consuming most of the bandwidth.I used to use cisco ASA as firewall but it's a while I last installed on and I'm nt uptodate which current state.So I thought of using an ASA 5512-X but I'd like to know if it comply with all the requirements .Most important being the reporting and bandwidth limiting capability. It would be great to have some configuration example regarding bandwidth management.
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Nov 10, 2012
I have a windows 2003 server and an ASA 5512
I'm trying to use SSLVPN and it was all working, and I don't believe any configs on either box have been changed.
On Friday people were connecting, but now I get a message "Login Error" in the browser. In the ASDM home 'latest ADSM Syslog Messsages' I get "AAA authentication server not accessible", followed by two messsages AAA Marking LDAP server in group as FAILED AAA Marking LDAP server in group as ACTIVE
When I go to configuration --> Remote Access VPN --> AAA/Local Users AAA server groups and click on my RADIUS server and click Test, it takes a while and says ERROR: AD agent Server not responding: No error
If I stop my IAS server on my Windows box i get the same error but much more quickly.
I have a sonciwall set up doing the same thing, and RADIUS seems to work happily, so I don't think it's the server config...
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Feb 18, 2013
My collegue and I have been trying to figure out why we are unable to get this ASA to NAT Overload correctly. I'm sure it is something stupid, and the config may have gotten a little dirty as we tried to change options and make it work. FYI, we can ssh from the WAN into the device to configure it. It is communicating externally, but it isn't natting.
ASA Version 8.6(1)2
!
hostname ASA5512-X-Remote
enable password ********** encrypted
passwd ********** encrypted
names(code)
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May 21, 2013
I have a customer who needs a 5512-X set up with two ports on the "Outside" interface and act like a switch on the outside. This is very easy to do with the way the ASA 5505 works just by creating vlans and treating the ports as members of the vlan.
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May 14, 2013
I am having soem difficulty getting documentation and setup procedures for the new ASA 5512-X (or X models in general) firewalls.I know the IPS sensor is a software-based one, but I'm not sure how much different the setup in than with a 5510 and IPS module.
Also, is the IOS upgrade procedure different?
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Aug 2, 2011
We had a problem with SMTP inspection dropping some regular emails (Cisco 2901 IOS 15.0). The original configuration.
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Jun 21, 2011
We had a problem with SMTP inspection dropping some regular emails (Cisco 2901 IOS 15.0).Incoming mails are going thru Spam and Virus Blocker so that bypassing SMTP inspection is not security issue in this case.
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Mar 14, 2013
IOS Firewall (ZBF) Limit SMTP connections from same IP
we are running a Postfix MTA behind a IOS Firewall (ZBF) on a CISCO1921. Sometimes we get more than 2000 smtp login attemps like
postfix/smtpd[123456]: connect from (...) (...) postfix/smtpd[123456]: lost connection after AUTH from (...)
in one second. May be bruteforce or DoS ... nevertheless - we like to protect the Postfix MTA from this stuff.
Can we inspect the smtp and limit connections in a time period from the the same IP? Something like "not more than 10 smtp connections during 60 seconds from the same ip" .
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Apr 10, 2013
I'm trying to access our ASA 5512-X via the Management port, but the address https://192.168.1.1/admin can't be displayed.
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Jun 9, 2013
I am configuring a brand new pair of ASA 5512s running 8.6(1). Traditionally we hae been using the Management port as the dedicated failover link, but that seems to not be possible on the 5512s.
ASA (config-if)# no management-only ERROR: It is not allowed to make changes to this option for management interface on this platform.
I have not been able to find anything in the official documentation mentioning this restriction.
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Jun 3, 2012
I installed a new ASA 5512-X over the weekend for a client. Their backup ISP connection is DHCP based. I need to use the 'dhcp client route track' command on the interface, but it is not available. However according the all the documentation I am looking at and even the ASDM says it should be available.
This is the version of ASA and ASDM they are running:
Cisco Adaptive Security Appliance Software Version 8.6(1)1
Device Manager Version 6.6(1)
I did upgrade to the latest ASA software, so has this command been removed? If I do a '?' in the interface, there isn't a 'dchp' option.
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May 2, 2013
I'm porting our configuration from a Pix 515 firewall to an ASA 5512x. What's vexing me right now is with the deprecation of the "static" command, I can't quite figure out the best way to Identity NAT my inside sub nets (multiple) to the DMZ sub net
So on the pix I have my identiy NATs as an example:
static (inside,dmz) <IntSubA> <IntSubA> netmask 255.255.255.0
static (inside,dmz) <IntSubB> <IntSubB> netmask 255.255.255.0
static (inside,dmz) <IntSubC> <IntSubC> netmask 255.255.255.0
Cisco's migration guide seems to do them one object at a time, which I guess is straightforward enough to do:
object network SubA
subnet <IntSubA> 255.255.255.0
[code]...
I'm thinking that there must be an easier way (aka less lines) to implement this for all the sub nets I want to Identity NAT to the DMZ.
1) Can I do this creating objects using a sub net with a net mask of 255.255.0.0 - one object to cover multiple internal sub nets?
2) Can I do this using object groups and trim this down to: (assuming I have to commands right)
Object-group network Inside_Subs
network-object <IntSubA> 255.255.255.0
network-object <intSubB> 255.255.255.0
network-object <intsubC> 255.255.255.0
nat (inside,dmz) source static Inside_Subs Inside_Subs no-proxy-ARP route-enabled. What would be the best way to translate my Identity NATs?
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Mar 25, 2013
If you look at the data sheet for the 5512-X the High Availability section states "Not Supported; ActiveActive or ActiveStandby" while the ASA 5515-X states "ActiveActive or ActiveStandby". What does "Not Supported" mean for the ASA 5512-X? Does this mean HA does not work, or that I need to purchase an additional license to use the HA feature?
[URL]
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Jun 7, 2013
I have a Cisco 5512 x Firewall connected with Cisco Layer 3 switch 3750.I have two different WAN connections, one for Data and one for voice. Cisco Layer 3 switch is configured with 2 different VLAN's one for data & other is Voice Vlan. Switch is providing DHCP to computers and IP phones. Voice Pool 192.168.10.0/24 Vlan10 and Data pool 192.168.20.0/24 Vlan20.I need to route my data & voice traffic separately. Cisco ASA is connected with two different ISP's. So, how can I do this configuration so that Voice and Data traffic will route separately.
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Apr 8, 2013
What is the benefit of replacing 5512 for 5510.
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May 1, 2013
I am having an issue where I can't connect to VPN after upgrading the license. The license upgraded is related to AnyConnect VPN. I noticed from the newly upgraded license, the Encryption-3DES-AES is disabled whereas previously it was enabled.
ASA 5512-K9
Version 8.6(1)2
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Oct 31, 2012
I am currently trying to enable WCCP between a Cisco ASA 5512 firewall and Barraccuda Webfilter 410 Vx applicance. The ASA firewall is running IOS version 8.6(1)2 and the Barracuda is funning firemware 6.0.0.013. Both the ASA and Barracuda are in the same network and can ping eachother. The ASA has several interfaces, outside, inside, data and dmz. The PCs and barracuda appliance are behind the data interface. ASA data IP 172.16.18.1 Barracuda IP 172.16.18.40 All PCs in the 172.16.18.0/24 subnet use the ASA as the default gateway and should have web requests redirected to the Barracuda.
Below are the respecive bits of my ASA config
interface GigabitEthernet0/0
description Management
speed 1000
[Code].....
I suspect my issue is that the ASA is generating a Router Identifier of 172.21.20.1 which is my inside network and the barracuda cannot communicate with it. how I can get this working ?
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Apr 7, 2013
From what I can find the ASA does not support policy routing.
I have two VLANS that need to go to the same destination but different routes. Anyway to accomplish this on the ASA?
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Jan 11, 2013
Configuration of inter-vlan routing on ASA 5512 ver 8.6? I have everything configured (un-nat, access-list, etc.) but still not working. When i do a packet capture, it says the traffic is denied by the implicit acl. Here is my config:
interface GigabitEthernet0/0.100
vlan 100
nameif data
security-level 100
[Code]...
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Aug 7, 2012
where I can find detailed documentation on these two products. Particularly, I am looking for high availability capabilities and any license requirements.
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Jul 4, 2012
I have a problem with random host's geting the wrong source address on a ASA 5512-X 8.6(1). Right now there is a host, 192.168.25.108, showing up with 6.6.6.6 (fake) on whatsmyip.org, should be 5.5.5.5 like the rest of 192.168.25.0/24. In the xlate tabel I cant find anything wrong. Same yesterday with two host, that are using the right NAT address today.
nat (any,outside) dynamic interface. (5.5.5.5)
object network H-192.168.25.10
nat (inside,outside) static H-6.6.6.6X(code)
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Apr 3, 2013
if on the ASA 5512-X virtual contexts are supported with version 9.1 ?
I found different information on the Cisco web, the ASA datasheet says it is supported but in the configuration guide I found exactly the opposite information.
Cisco ASA Series General Operations CLI Configuration Guide 9.1 and 8.6 [URL]
Cisco ASA 5500 and ASA 5500-X Series Next- Generation Firewalls for Small Offices and Branch Locations Data Sheet (Updated) [URL]
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Jan 10, 2013
Is the 5512 able to be field upgraded to a 5515 and so on through 5555? I.E. Can I add ram and other hardware to make the boxes more powerful as my requirements increase? I was hoping this would have been a new feature with the ngen firewalls.
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Mar 8, 2013
I've been asked to deploy an ASA in Transparent Mode because of concerns of putting another layer 3 hop between PE and CE routers running BGP.
Is there some problem with allowing BGP to flow freely through an ASA the is also terminating site to site and remote access vpn tunnels?
I just don't see the need for Transparent Mode here and you cannot have a standard DMZ setup with Transparent Mode: you have to use bridge groups to provide for multiple interfaces on the ASA and then have an external router route between those bridge groups.
what I'm missing here as to why Transparent Mode is needed (not needed)
ASA is 5512
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Jun 26, 2012
Does ASA 5512-X have a category-based webfilter build-in?
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Sep 29, 2011
i'm having a problem establishing a pppoe session with a 1812 router. i've tried everything i could find online, even contacted the isp (all they said was that the modem should be in bridge mode, which it is).
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Mar 5, 2012
I have an ASA 5500 Firewall. I need to figure out how to log all events using Port 25 to determine if there are any rogue devices on our network. I was trying to figure out how to do this via the Real-Time Monitoring (filter) but have had no success.
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Dec 29, 2011
I am trying to configure my ASA5505 to allow SMTP relay and the ACLStatic I created is not working.
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Dec 25, 2012
Most examples of NAT translation using an ASA 8.4 are based on servers within a DMZ. In my case it's not because the mailserver also functions as an data and Active Directory server for my local domain. If tried to config the ASA for a while now and throw it in the corner for a couple of months out of frustration. Now I got some time left during christmas break I decided to start again.My purpose is to NAT SMTP / POP traffic from the internet, trough the ASA to my (inside) server. This is what I got so far. With this config I'm unable to telnet the inside server (192.168.1.10) from a remote location.
ASA Version 8.4(3)!hostname ciscoasaenable password cE8UUNd encryptedpasswd 2KFQ.2KYOU encryptednames!interface Ethernet0/0switchport access vlan 2!interface Ethernet0/1!interface Ethernet0/2!interface Ethernet0/3!interface Ethernet0/4!interface Ethernet0/5!interface Ethernet0/6!interface Ethernet0/7!interface Vlan1nameif insidesecurity-level 100ip address 192.168.1.253 255.255.255.0!interface Vlan2nameif outsidesecurity-level 0ip address 95.*.*.218 255.255.255.248!ftp mode passiveobject network obj_anysubnet 0.0.0.0 0.0.0.0object network server1_smtphost 192.168.1.10object network server1_pop3host 192.168.1.10access-list outside_access_in extended
[code]....
I can ping 192.168.1.10 from the ASA CLI. I can Ping DNS 4.2.2.2 from the CLI (internet access). I can Telnet the server from the inside LAN, using: telnet 192.168.1.10 25.But I can't Telnet from an outside location using: Telnet 95.*.*.218 25 Because my server is on the Inside interface (diffenrent subnet) do I need an additional route?
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