-Production
SQL> quitDisconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsOracle @ tbslinux: ~> Emca-config dbcontrol db
Started emca at Jan 5, 2012 9:49:10 AMEM Configuration Assistant, Version 11.2.0.0.2 ProductionCopyright (c) 2003,200 5, Oracle. All rights reserved.
Enter the following information:Database SID: ticketListener port number: 1521Listener ORACLE_HOME [/oracle/produ
the parameter is r, read the tcpdump package for analysis)
Call offline_capture to analyze offline packages
2. capture. c
The offline_capture function calls pcap_loop to capture packets for analysis. process_packet is a callback function used to process packets.
3. process-packet.c
The process_ip function distinguishes the incoming and outgoing packets based on the source ip address and destination ip address of the ip package.
Only data> 0 p
is normally routed back to the internal network.
To ensure that the source address belongs$ Ext_if1Packets are always routed$ Ext_gw1(Pair$ Ext_if2And$ Ext_gw2 is the same), The following two rows should be included in the Rule Set:
pass out on $ext_if1 route-to ($ext_if2 $ext_gw2) from $ext_if2 \to anypass out on $ext_if2 route-to ($ext_if1 $ext_gw1) from $ext_if1 \to any
Eventually, Nat can also be used on each outbound interface:
nat on $ext_if1 from $lan_net to any -> ($ext_if1)nat on
scanning.Files in other directories cannot be operated even after files are uploaded.Shell cannot be executed even if files in other directories are operated.Users cannot be added even if shell is executed.You cannot log on to the graphic terminal even if you have added a user.Even if you log on to the graphic terminal and have system control, what he does will still be recorded.
Additional measures:We can add some devices and measures to further enhance system security.1. proxy firewall. For e
China's first monitoring of Skype has solved the problem that Skype Network calls cannot be monitored. On-site agents can not only block Skype calls in different time periods, but also conduct traffic analysis and statistics on it: the Analysis of BT traffic is more accurate. The mail monitoring query provides an HTML display method to make the recorded content clearer. It also increases alarms for Trojans or similar insecure software that use MAC spoofing in the network, makes the network more
The Linux administrator should understand the usage of 20 IPTables firewall rules
Managing network traffic is one of the most difficult tasks that must be handled by the system administrator. We must specify that users connected to the system meet the incoming and outgoing firewall requirements to protect the system from attacks to the maximum extent.
Many users regard IPTables in Linux as a firewall. In strict opinion, IPTables is only a command line
After the National Day, zhibang International has made great strides. Version 31.85 is officially released! A wave of new features are coming, new Custom shipment, one-click Import, unlimited dispatch approval, manual entry by express delivery company, one-click supplier outgoing call, automatic off-site price retrieval, detailed collection product printing, and fixed asset workload in batches input and a series of new functions. The mobile terminal p
input data return The first parameter of the Inputsalary () function Parr to an array outside the function that holds payroll data. This allows us to save the payroll data entered by the user to the external array it points to, thereby indirectly realizing the outgoing of multiple data within the function. In this function, we also use the function return value to get the total number of data entered from the function. This also indicat
Linux Network Programming 4--Personal SummaryTCP and UDP communication flow
The basic steps for TCP communication are as follows:
Server: Socket---BIND---listen---while (1) {---accept---recv---send---close---}------close
Client: Socket------------------------------Connect---Send---recv-----------------close
The basic steps for UDP communication are as follows:
Server: Socket---bind---recvfrom---sendto----close
Client: Socket----------sendto----recvfrom---C
This article summarizes a section of Android to get the call time program code, the need for friends to refer to.
We know that the phone length of the Android system should be callog, so it is advisable to check contactprovider, or Telephonyprovider
Service Test
Can start when the call starts service record current time A, then stopself (); In addition, start the service again at the end of the call, get the current time B again, and compare time a with B.String time = long.tostring (when the
clients are allowed to be in the receiving State, if more connection requests are received, they are ignored. Listen () successfully returned 0, failure returned-1.
3), accept
int accept (int sockfd, struct sockaddr *cliaddr, socklen_t *addrlen);
After the three-party handshake is complete, the server calls accept () to accept the connection and, if the server calls accept () without a client connection request, blocks the wait until a client is connected. CLIADDR is an
The study of the Dubbo protocol, you can know the current mainstream RPC communication is probably what the situation, this article refer to Dubbo official documentation
Http://dubbo.io/User+Guide-zh.htm
Dubbo supports a total of the following communication protocols: dubbo://rmi://hessian:///http/webservice://thrift://memcached://redis://
Some of the features and usage scenarios of the protocol are as follows:
1. Dubbo Agreement
The Dubbo default protocol uses a single long connection and NIO
User-controlled switches are quite common. So I studied the types and functions of these switches and shared them here, hoping to be useful to you. A user-controlled switch is a dedicated switch for internal telephone exchanges between industrial and mining enterprises and other organizations. Its basic function is to complete mutual calls between users within the Organization, however, there are also incoming and outgoing trunk lines that can be conn
The concept of broadcasting
Case-Listen to SMS and parse SMS content
Case-intercept outgoing calls and set the area code
Case-SD Card Status monitoring
Introduction to some popular broadcasts
Send Custom Broadcasts
Ordered broadcast and unordered broadcasts
Leave!!!The concept of broadcasting
Type of broadcast:
out-of-order broadcasting (Normal broadcasts), similar to the daily use of WiFi, by a
css to achieve smooth fade-in and fade-out effects. First, use the transform attribute to zoom in and copy the code: h2: hover {/* CSS3 Transform Effect */-webkit-transform: scale (1.2 ); /* Safari Chrome */-moz-transform: scale (1.2);/* Firefox */-o-transform: scale (1.2 ); /* Opera */}: Use the transition attribute to implement the fade-in and fade-out Effect. The Code is as follows: h2 {/* CSS3 Transition Effect */-webkit-transition: all 0.12 s outgoing
and in-depth understanding of the exchange system.
2) ComparisonCompare the difference between faulty equipment and normal equipment to identify the fault location. This method is easy to use and is especially beneficial for troubleshooting software faults, but its disadvantage is its limited use. In particular, some faults cannot find effective comparison benchmarks.
3) replacement methodReplace suspicious devices with normal devices. This method is mainly used to handle hardware device faults
A user-controlled switch is a dedicated switch for internal telephone exchanges between industrial and mining enterprises and other organizations. Its basic function is to complete mutual calls between users within the Organization, however, there are also incoming and outgoing trunk lines that can be connected to the Intranet of the public telephone network and user calls in the network (including municipal calls, domestic long-distance calls, and in
Kernel region URL filtering vulnerability affects Samsung Note 3, Galaxy S6 (CVE-2016-2036)
A Bug that affects Samsung Note 3 and Galaxy S6 mobile phones-what is the problem with URL filtering in the kernel? Author: Robert Paleari (@ rpaleari) and Aristide Fattori (@ joystick) ID: CVE-2016-2036 notification date: Release Date: When studying Samsung's Android kernel, we found a module named secfilter. The initialization program of this module attracts our attention because some Netfilter hooks ar
elements have the opportunity to go out of the stack, said the ground is that a (I-1) blocked the front (I -2) elements!
1, for a (I-1) followed by AI out of the stack: A (I-1) is {A1, A2, A3 ,..., A (I-1), A (I + 1), a (I + 2 ),..., an} A total of (n-1) elements of the I-1 element, so in this case all the number of outgoing Stacks is S (I-1, n-1)
2. When a (I + 1) is followed by AI to exit the stack: A (I + 1) is {A1, A2, A3 ,..., A (I-1), A (I + 1
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