One oracle instance Monitors multiple ports. Now we can create an oracle instance with two listening ports. There are two methods:
One oracle instance Monitors multiple ports. Now we can create an oracle instance with two listening ports. There are two methods:
One Oracle instance is configured with multiple liste
One MySQL server starts multiple ports: bitsCN.com
One MySQL server starts multiple ports
In the test Mysql multi-master and one slave server, that is, one slave server synchronizes multiple ports to different master databases. This document describes how to enable different ports.
Detailed steps:
1. first, copy
CentOS7 View open Ports commandCentOS7 Open-close view ports are controlled by a firewall with the following commands:To view ports that are already open:Linux Code
Firewall-cmd--list-ports
Open portLinux Code
Firewall-cmd--zone=public--add-port=/tcp--permanent
Command meaning:–zone #作用域–add
stealing music ah. Online games good, online games for hundreds of players to provide fun and a secret game experience, they fight each other online or join the team to overcome the common enemy. I am full of confidence to write my network, so, found that the past blocking synchronization mode mode can not get a huge number of multi-player [MMP] architecture, directly denied. So, there is a IOCP, if can be easily and lifting IOCP, also will not have this tutorial. Please follow me to get to the
Note: The basic operation of the firewall command:Querying firewall Status:[[Email protected] ~]# service iptables statusTo stop the firewall:[[Email protected] ~]# service iptables Stop To start the firewall:[[Email protected] ~]# service iptables start To restart the firewall:[[Email protected] ~]# service iptables Restart To permanently shut down the firewall:[[email protected] ~]# chkconfig iptables offEnable after permanent shutdown:[[email protected] ~]# chkconfig iptables on1. View firewa
Linuxiptables is set to 22 and 80 ports only. you can run the netstat-tnl command to check which ports are opened on the server. The Ssh code netstat-tnl is used to view the Ssh code iptables-L-n enabled for the firewall. 22, port 80 Ssh code iptables-... linux iptables is set to 22 and 80 ports only. you can run the netstat-tnl command to check which
Wake up feel like modifying VPS server ports are important in Linux and Windows servers because Linux SSH defaults to port 22,windows's Remote Desktop default port is 3389, which is often scanned by researchers with ulterior motives, and if these commonly used ports are found to be open, Will touch their inspiration, so whether it's a Linux server or a Windows server, you have to modify these default
Iptables is a firewall under Linux and is also the service name.Service iptables Status View firewall stateService iptables start to turn on the firewallservice iptables Stop shutting down the firewallService iptables Restart Restart firewallfirewalls Open specific ports:① file/etc/sysconfig/iptables② Add:-A rh-firewall-1-input-m State--state new-m tcp-p TCP--dport 8080-j ACCEPT★ The number 8080 for open 8080 port, can also be changed to other
The network software is composed of the client and the service side, and the server listens to the specified port to process the received data, and the client sends the data to the server-side listening port, and the data is processed by the server side, then the processing result is returned to the client.so how do we see on Linux what ports we are listening to, and which clients are connecting to my server? first of all we need to know what protocol
-byte protocol identifier (TPID). When the prefix 0 x is fixed, it indicates that the frame carries the mark information of 802.1Q.Two bytes of tag control information (TCI), including three fields.Priority domain, which occupies 3 bits, indicates the Priority of the message. values 0 to 7 are the highest Priority, and 0 is the lowest Priority. This domain is used by 802.1p.Standard Format Indicator (CFI) domain, 1bit, 0 indicates standard format, used in Ethernet; 1 indicates non-standard forma
Using Linux Shell to disable host ports in LAN in batches
Assume that there are multiple hosts in the LAN, and only the ssh service (port 22) can be activated. If other services are opened, all are disabled. Run a shell script to complete the above functions. In actual O M, you can use puppet and other tools to perform this function faster and better. Therefore, this case is only used to train your hands to familiarize yourself with common shell comm
This article mainly introduces how to find nine consecutive idle ports in Python. For more information, see this article. it mainly introduces how to find nine consecutive idle ports in Python, for more information, see
I. project requirements
To install a software, enter the idle port during configuration. Check whether a port of five platforms is occupied
Five platforms are windows, linux, aix, hp, and s
The aggregation transformation allows you to define groups for aggregations, rather than performing aggregations across all input data. For example, instead of looking for total company sales, you can find the total sales by region group.To define a group for an aggregate expression, select the appropriate input, input/output, output, and variable ports in the aggregation transformation. You can select multiple group by
As an embedded product, the company uses the ARM kernel and Linux operating system (not uClinux ). My recent work is to mount a previously prepared module (via serial port for communication) to the system, and control a series of work of this module through serial port, and require
Into a separate driver (not controlled by an application ). I also want to familiarize myself with the development method of the device driver in Linux. The Development Board of another company we bought, Linux, can n
Close dangerous ports with one click (preventing hacker intrusion)Dangerous, port, hackerCopy all of the following contentUse NotePad to save the suffixBatCopy From @ below as prompted
Copy codeThe Code is as follows: @ echo off
Color 1f
Title: Disable common dangerous ports
Echo.
Echo.
Echo this batch is used to start the firewall of the XP system and disable common dangerous
CentOS iptables is accessible only on ports 22 and 80.
Iptables is accessible only on ports 22 and 80.
Run the netstat-tnl command to check which ports are opened on the current server.
Ssh codeNetstat-tnl
View firewall settings
Ssh codeIptables-L-n
Open ports 22 and 80
Ssh codeIptables-a input-p tcp -- dport 22
In Linux, how does one view the developed port ?, View development ports in linux
Introduction: on Linux servers, it is often necessary to check whether certain ports of the system are enabled normally, or to know which processes occupy specific port services. Therefore, this command is very common, this article describes common methods for these commands.
1. check whether a specific port is enabled or occu
I. Relationship between ports and servicesThe correspondence between the port number and the corresponding service is stored in the/etc/services file. Most ports can be found in this file. Use the netstat commandThe displayed service name is also found in this file. Some people say that they can disable the port by comment out the corresponding port number in this file.I tried it but it didn't work. This me
in the Linux under, by default 1024x768 The following ports are to be Root can be used under other users, if you try to use it will be an error. At some point, we may consider that the program runs under the root account, but this may pose a security risk to the Linux System. How can you allow a non- root user to run a program that is less than the 1024x768 port? This article attempts to give some methods: The first method: SetUIDUser is set to the
Recently found that Apache failed to start, check log also no fruit, through the manual launch prompts the following error:
(OS 10048) typically each socket address (Protocol/network address/port) is allowed only once. : Make_sock:could not bind to address 0.0.0.0:80
No listening sockets available, shutting down
Unable to open logs
This is due to the 80 port is occupied, the use of 80 ports to stop the process.
How do I see that process takes up
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