I. Overview:
By default, ASA does not respond to TTL exceeded packets, so Traceroute/tracert does not see the ASA device, and Traceroute/tracert cannot traverse the firewall because of firewall policy restrictions.
Two. Basic ideas:
Depending on how the Traceroute/tracert is handled, determine why it is not possible to traverse the firewall, thereby releasing the corresponding firewall policy:
A.windows
Cisco ASA iOS Upgrade or RestoreFirst, pre-upgrade preparation work1. Prepare the iOS files to be upgraded and the corresponding ASDM files2. Set up TFTP on a computer, setup the directory, and connect with the firewall (assuming the computer IP is 192.168.1.2)Second, upgrade steps1 , Telnet on the ASAasa>en//Enter privileged modeAsa#conft//Enter configuration mode2 , viewing files on the ASA, version infor
I. Overview:
I listened to the ASA course of yeslab's instructor QIN Ke and talked about ASA's random initialization of serial numbers to disrupt TCP. So I set up an environment for testing and found that not only is the serial number initialized by TCP disrupted, the subsequent TCP packet serial numbers will also be disrupted.
---- Postscript: After listening to the subsequent tutorials, we know that the initialization serial number is disrupted beca
ASA supports two same-security-traffic types. Their application scenarios are1: different interfaces with the same security-level2: traffic between the same interfaces: cisco is called IPSEC hairpinnig, which is mainly defined in ipsec vpn.Description: ipsec vpn is not used for tunneling, or tunneling is not allowed. All traffic must be routed from the ASA.2. There are two scenarios: a: one client (vpn) to
It is actually using the file "global. asa "! Many new ASP programmers want to know what this is? In fact, global. asa is an event driver, which contains four event processing processes: Application_OnStart, Application_OnEnd, Session_OnStart, and Session_OnEnd.When a page of an application on a website is accessed by a user for the first time, global. asa
Release date:Updated on:
Affected Systems:Cisco ASA Description:--------------------------------------------------------------------------------CVE (CAN) ID: CVE-2014-0653, CVE-2014-0655
The Cisco ASA 5500 Series Adaptive Security Device is a modular platform for providing security and VPN services. It provides firewall, IPS, anti-X, and VPN services.
A Security vulnerability exists in the implementation of
When the sybase asa database is shut DOWN abnormally, it is prone to exceptions, such as table or index errors. The trouble is that the database will go DOWN when you delete a table using drop table t_name. Below are two common restoration methods:
Sybase asa database restoration method
When the sybase asa database is shut DOWN abnormally, it is prone to except
I. Overview:
In actual work, it is estimated that two ISP lines, such as China Telecom and China Netcom, are often connected using ASA, and there is not enough budget to buy load balancing equipment, however, we want to achieve load sharing and automatic switching of links. We want to return traffic from China Telecom, from China Telecom to China Telecom, and from China Netcom to China Telecom. When one of the lines fails, all traffic never goes throu
Network Topology
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Set dynamic pat on the ASA firewall so that the Intranet can access the Internet through a public address
The command is as follows:
Ciscoasa (config) # NAT (inside) 11900001.0 255.255.255.0
Ciscoasa (config) # global (outside) 1 Interface
Set static nat on
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I. Overview:
It is estimated that the actual work will often encounter with Asa two ISP line, for example, Telecom and Netcom, and there is not enough budget to buy load balancing equipment, but want to achieve link load sharing and automatic switching, from telecommunications to traffic, from the telecommunications line back, from Netcom to the flow of traffic from the Netcom line back, When one of the lines fails, all traffic never goes off the fau
This is certainly not the first article on "Quick Guide to building a VPN using Cisco devices, however, we still hope that this guide will become an all-in-one guide for users who use ASA 5505 devices to set up VPN and connect to the Internet.
The ASA itself has a setup wizard, but this wizard does not cover all aspects of work required by the user, and some steps are vague, making it difficult for the user
the flash format650) this.width=650; "Src=" Http://s2.51cto.com/wyfs02/M00/82/28/wKioL1dNLxuiOdu-AAAQJCGgzwc938.png-wh_500x0-wm_3 -wmp_4-s_2149940309.png "title=" 4.png "alt=" Wkiol1dnlxuiodu-aaaqjcggzwc938.png-wh_50 "/>To ensure that no errors occur when using the command WR, copy run start, after restarting the ASA, in the global configuration mode650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M01/82/28/wKioL1dNL5fjluXRAAAppw3MQ2o580.png-wh
//Disable Logging 503001logginghostdmz 192.168.12.1//specifies the interface log server (SYSLogserver) IP Address Troubleshooting tool Packet TracerThe Packet tracer simulates a packet traversing the data channel of the ASA and tracks the entire processing of the packet by the ASAASA1 (config) #packet-tracerinputdmzicmp192.168.12.10080 192.168.12.139phase:1 //View Route Type:route-lookupsubtype:resolveegressinterfaceresult: allowconfig:additionalinfo
The IPSec VPN realizes the network expansion, the firewall realizes the control and the filtering to the network traffic, therefore has the influence to the IPSec VPN communication.
The default ASA maintains a state session only for UDP/TCP traffic, and therefore discards the ESP traffic that is returned. There are two ways to solve the problem
One uses ACLs to release ESP traffic.
Two applications check IPSec VPN.
Experimental topology
R1 conf
Tags: connecting database expected database file Contact Us jewelryI 've picked up a couple of days Sqlanywhere (ASA) database, where two of the databases are reported as "File isshorter than expected-transaction rolled back" error,650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M02/84/61/wKiom1ePD7Hyg0xRAABBOiL-9xQ267.png-wh_500x0-wm_3 -wmp_4-s_1269407155.png "style=" Float:none; "title=" Qq20160720133433.png "alt=" Wkiom1epd7hyg0xraabboil-9xq
It is an important feature to determine whether a DBMS is powerful and whether external stored procedures are easy to create and use.
The ASA database has long been supporting the use of C, CLR (. NET), Java and other programming languages to create stored procedures.
The following is a simple example to create a Java-based ASA stored procedure, database (asa11.0 or later). This example is very simple. Ente
There are many ways to count online users in ASP, and I cannot figure out several ^ _ ^ methods. I would like to introduce three methods first. If there are any errors, please criticize and correct them. There are also good methods, please add it!
First, we will introduce a simple method, using application, session, and global. asa, because when the web pages created with ASP are stored in the base point directory of the WWW server and the WWW server
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