Hello, everybody!I have a very strange problem in my internal LAN. Please, take a look at the attached picture, its from my ASA 5508 firewall.About once in every two minutes DNS queries from my internal DNS servers (192.168.13.20, 192.168.13.51 - bot...
Network Security
Engage with peers and experts on network security topics such as Secure Firewall Threat Defense, Adaptive Security Appliance, Secure Firewall Management Center, and Security Cloud Control.
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
- Cisco Community
- Technology and Support
- Security
- Network Security
Options
- Mark all as New
- Mark all as Read
- Float this item to the top
- Subscribe
- Bookmark
- Subscribe to RSS Feed
- Threaded format
- Linear Format
- Sort by Topic Start Date
Labels
-
AAA
(9) -
Access Control Server (ACS)
(6) -
Access List
(4) -
ACI
(10) -
Advanced Threats
(1) -
AMP for Endpoints
(1) -
AnyConnect
(2) -
APIs
(1) -
Appliances
(17) -
ASA
(1) -
Branch Router
(1) -
Buying Recommendation
(81) -
Catalyst 2000
(1) -
Catalyst 3000
(2) -
Catalyst 4000
(1) -
Catalyst 6000
(1) -
Catalyst 8000
(1) -
Catalyst 9000
(2) -
Catalyst Switch
(3) -
Catalyst Wireless Controllers
(1) -
Cisco
(1) -
Cisco Adaptive Security Appliance (ASA)
(9,339) -
Cisco Bugs
(65) -
Cisco Cafe
(15) -
Cisco CLI Analyzer
(1) -
Cisco Cloud Services Router
(1) -
Cisco Defense Orchestrator (CDO)
(140) -
Cisco Firepower Device Manager (FDM)
(768) -
Cisco Firepower Management Center (FMC)
(2,700) -
Cisco Firepower Threat Defense (FTD)
(2,986) -
Cisco Press Cafe
(1) -
Cisco Secure Firewall Device Management (FDM)
(57) -
Cisco Secure Firewall Management Center (FMC)
(287) -
Cisco Secure Firewall Threat Defense (FTD)
(343) -
Cisco Security Cloud Control
(17) -
Cisco Security Manager (CSM)
(3) -
Cisco Software
(20) -
CISCO START ANZ
(1) -
Cisco Threat Response
(1) -
Cisco Vulnerability Management
(45) -
Cloud
(1) -
Cloud Provisioning
(1) -
Cloud Security
(2) -
Community Bug or Issue
(1) -
Community Feedback Forum
(26) -
Community Ideas
(12) -
Compliance and Posture
(1) -
Crypto
(1) -
CSC Content with No Valid Community to Post
(1) -
CUBE
(1) -
CUCM
(1) -
Data Center Networking
(1) -
Device Admin
(15) -
EEM Scripting
(1) -
Emergency Responder
(1) -
Endpoint Security
(6) -
Enterprise Agreement
(1) -
Event Analysis
(238) -
FirePOWER
(1) -
Firepower Chassis Manager (FCM)
(2) -
Firepower Device Manager (FDM)
(14) -
Firepower Management Center (FMC)
(383) -
Firepower Threat Defense (FTD)
(206) -
Firewall Migration Manager (FMM)
(1) -
Firewall Migration Tool (FMT)
(39) -
Firewalls
(1,051) -
FMC
(1) -
General
(2) -
Guest
(1) -
Identity Services Engine (ISE)
(8) -
IE3300
(1) -
Integrated Security
(8) -
Integrated Security Architecture
(1) -
Integrations
(4) -
Investigation
(2) -
iOS
(1) -
IPS and IDS
(6,519) -
IPS and IDS1
(1) -
IPS-IDS
(1) -
IPSEC
(1) -
IPv6 Configuration
(1) -
ISE
(1) -
LAN Switching
(6) -
License
(307) -
MPLS
(1) -
Multicloud Defense
(2) -
Network Management
(87) -
Network Security
(2) -
NFVIS
(1) -
NGFW Firewalls
(37,235) -
NGIPS
(1,794) -
Online Tools and Resources
(1) -
Optical Networking
(3) -
Optics
(1) -
Other Collaboration Topics
(1) -
Other Community Feedback
(3) -
Other Firewalls
(1) -
Other NAC
(18) -
Other Network
(3) -
Other Network Security Topics
(10,662) -
Other Networking
(9) -
Other Routers
(8) -
Other Routing
(22) -
Other Routing and Switching topics
(2) -
Other Security
(1) -
Other Security Topics
(18) -
Other Switches
(12) -
Other Switching
(4) -
Physical Security
(19) -
Policy and Access
(2) -
Prioritization
(3) -
Remote Access
(1) -
Room Endpoints
(1) -
Routing Protocols
(8) -
SD-WAN Security
(1) -
Security
(5) -
Security Management
(566) -
Segmentation
(3) -
Service Providers
(1) -
Small Business Routers
(5) -
Small Business Security
(2) -
Sourcefire
(2) -
Support
(2) -
Threat Containment
(6) -
Threat Grid
(1) -
Unified Computing System (UCS)
(1) -
Voice Gateways
(1) -
VPN
(27) -
VPN and AnyConnect
(1) -
Vulnerability Management
(43) -
WAN
(7) -
Web Security
(4) -
Webex Teams
(1) -
Wired
(4) -
Wireless Security
(1)
- « Previous
- Next »
Forum Posts
We currently run a pair of ASA5555x's in FO for our prod perimeter protection.I have bought all of the required licenses and hard drives to upgrade the firewalls to run the Firepower services.Both firewalls currently run the Cisco IPS module.Hoping s...
Resolved! ASA Firepower services bundle
Hello guys, Hope you are doing well! I am about to buy an ASA-x with firepower services and I need your help:1) Does the ASA-x Bundle include all the Firepower licenses (IPS+URL+AMP)? if so, are these permanent licenses?2) If I purchase the Bundle, d...
Resolved! ASA pre 8.3 NAT
Hi Team,I have 3 interfaces on ASA, guest, outside and DMZ.The guest is trying to browse to xyz.com, which resolves to a proxy arp address on the outside interface. There is a static NAT for this address to a host in the DMZ.I want to translate the d...
Does anyone know how to change the gw on the sourcefire module on a cisco asa 5515-x? I set up the IP on the module and it works fine, but the gw has since changed and I cannot seem to change it. I have tried changing in the asdm in the startup wizar...
Hi,I dont know if this is a bug in different versions of ASDM or something that i'm doing wrong but it could be solved changing something. I've tested this with different versions of ASDM, from 7.2.2 to 7.4.1, and different versions of ASA, asa923-4-...
Hi, The back of the ASA 5516-X unit says a different serial number compared to the show version from the unit. Is that a problem, Which SN to link the license to? I received a 5516 control license in the box. ThanksLovleen
Having just upgraded to 5.3.1.4 (19) i'm trying to apply Access Control Policy, nothing fancy just a new un-configured policy. When I click apply to device after about a minute I get an error as follows:Access Control Policy Apply ErrorThe access co...
Resolved! Migrating from ASA 8.4 to 9.5
Hello,I am replacing existing ASA 5520 8.4 firewall with ASA 5545X 9.5, I am migrating the configuration from the existing firewall to the new one. What I have done so far, I have extracted the 8.4 configuration and applied it on the 9.5 section by s...
Resolved! ASA Security Level Help
Hi I've just started a new role and after looking at the ASA 5550 config I have an issue. The inside interface has security level 0 and outside security level 100!It's been like this for years!So there're lots of inbound rules , some NAT entries and...
anybody knows an ASA Firepower can block/permit "naver line" Application.
Resolved! DMZ ASA 5505
HI There, We are setting up a DMZ for our VPS Virtual Machines. We have our esxi host behind the firewall on 192.168.1.101Our VMs internally are all working fine. Our issue is we want to create VPS VMs with a static public IP address on the DMZ. We h...
Resolved! ASA packet tracer cisco
Hi ,When you ping from asa packet tracer it does say the connection fails but it doesn't if you do it actually , why ? for isntance I can ping 8.8.8.8 from outside interface ip but when i do the packet tracer command it says it will fail. does the ...
I got some issues with NAT configuration. I have a host server with 2 service: WWW and DNS. I want to access Server via IP address and domain from outside. How to configuration ASA and router??? Thank's!!!P/s: my english is not good !!!
I just reboot my both firewalls connected as active/failover mode, some of the devices were not establishing the connection. when I checked the fire wall I notice these connection using same source and destination interface OUTSIDE.UDP OUTSIDE 10.2....
Learn, share, save
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide
Unanswered Topics
| Subject | Author | Posted |
|---|---|---|
| 11-06-2026 12:20 AM | ||
| 09-22-2026 04:13 PM | ||
| 08-25-2026 06:22 PM | ||
| 08-24-2026 12:26 AM | ||
| 08-20-2026 05:54 AM |
New solutions
Top Solution Authors
| User | Count |
|---|---|
| 3 | |
| 1 | |
| 1 | |
| 1 | |
| 1 |
