turnkey linux email server

it with your own email address. You can enter or do not enter a key passphrase before saving the private Key ). Of course, security is used. Key passphrase and the Confirm passphrase below it are the aforementioned cryptographic phrase used to protect the private Key. It is better to mix uppercase and lowercase letters with numbers and add special characters such! " £ $ % ^. If you save the private key without entering the password phrase, a confirma

Linux and Cloud computing--the second phase of Linux Server SetupThe nineth Chapter:Mail e-mail server Setup-Configure SSL-based mail servers and the use of virtual domainsMail Client Configurationcan be self Select the email client to set according to the configuration of t

Administrator2. Avoid IP address conflicts3. When the current network changes the IP address segment, you do not need to reconfigure each user's IP address4, improve the utilization of IP address5, convenient configuration of the clientDHCP-assigned address information mainly includesIP address, subnet mask of the network cardThe corresponding network address, broadcast addressDefault gateway AddressDNS server addressExperimental environment

to:Pubkeyauthentication Yes 4. TestingLog on to the server using the key on the client:[Email protected]:~$ ssh-i ssh/id_rsa [email protected]last login:tue May 9 15:14:01 from 10.0.0.129[[email prote CTED] ~]# 5. Precautions In the server side need to

clients.Service mode: C/S ;SERVER:DHCP Server (running DHCP service);UDP: Monitoring 67CLIENT:DHCP Client (running DHCP program);UDP: Monitoring 682. Install and configure DHCP:[[Email protected] ~]# service iptables stop[Email protected] ~]# Setenforce 0: Turn off firewall and selinux;[Email protected] ~]# ifconfigEt

= RW# trainers have full access to the training repository[trainingrepos:/]@training = RWLet's configure our Authz file:[email protected] conf]# cat Authz[Groups]admin = DaveDev=tianlesoftware[davesvn:/]@admin = RW@dev = RW[Email protected] conf]#2.4 Starting and stopping SVN services(1) Start the SVN service:[Email protected] conf]# svnserve-d-R/U02/SVN-D indic

attacker's program is hidden deep, such as the rootkits backdoor, in which case the PS, top, netstat and other commands may have been replaced, if the system's own command to check the suspicious process becomes not credible, at this time, It is necessary to use third-party tools to check system suspicious programs, such as the previously described Chkrootkit, Rkhunter and other tools, through these tools can easily find the system is replaced or tampered with the program.Five, check the integr

. 　　 SUSE SLES8 SUSE SLES8 is the old one in two Enterprise Linux versions and has reached the end of its lifecycle. SLES 8 features a regular 2.4 kernel update (SUSE has released three service packages for SLES8 users to ensure system security and performance that can be supplemented with updates ), it provides options for all categories. There are three types of file systems with logs available. By default, all common database, Web

port information of the local source host is displayed by this keyD Use this key to toggle whether the port information for the remote destination host is displayedP Use this key to toggle whether the port information is displayed> This key can be used to sort the host name or IP address of the remote target hostO This key toggles whether the current connection is fixedThe power of iftop is that it can display the traffic status of the network in real-time, monitor the source IP and destination

11Time correct to within 7948 MSPolling server every SBecause it is the intranet, the general Ntpstat can be synchronized quickly.OK, after the native Client configuration is complete, use the SCP copy/etc/ntp.conf to other client machines that need to be synchronized, and start the NTPD service.The operation configuration on other client machines is as follows:The third machine is also configured.[Email p

DistributionCopyright (c) and/or, Oracle, its affiliates. All rights reserved.Oracle is a registered trademark of the Oracle Corporation and/or itsAffiliates. Other names trademarks of their respectiveOwners.Type ' help ', ' or ' \h ' for help. Type ' \c ' to clear the current input statement.Mysql>6. Shutdown and restart of MySQL service[[email protected] www.linuxidc.com ~]# service mysqld StopShutting down MySQL. [OK][

The FTP service can be divided into two categories based on different service objects: one is the system FTP Server, which only allows valid users on the system to use; the other is the Anonymous FTP Server, Anonymous FTP Server, it can be used by anyone to log on to the FTP server to obtain files. Next, this article d

, and the information entered by the customer through the pipeline to the parent process parent process: Accept the server information and display, will be from the child The information received by the process is sent to the server */int main (int argc, char *argv[]) {int sock, PID, pipe_fd[2], EPFD; struct sockaddr_in addr; addr.sin_family = pf_inet; Addr.sin_port = htons (Serv

First, build preparation1. Determine your time zone#date命令可以查看当前系统时间, China's time zone is CST. To configure the time zone using the Tzselect command 650) this.width=650; "border=" 0 "src="/e/u261/themes/default/images/spacer.gif "style= " Backgroun D:url ("/e/u261/lang/zh-cn/images/localimage.png") no-repeat center;border:1px solid #ddd; "alt=" Spacer.gif "/>Configuration file Modification:/etc/sysconfig/clock2. Check NTP service Program#rpm-qa |grep NTP Fontpackages-filesystem-1.41-1.1.el6.no

As a system administrator, how do you always have enough information about all aspects of your server's state performance? How can you be very aware of your current Linux Server (10-100) status performance information? one, how to view the server's CPUBasis of judgment:1. CPUs with the same core ID are Hyper-threading of the same core. (Physical ID and core Idare not necessarily consecutive but t

CHATTR command to lock important information files on the server, such as/etc/passwd,/etc/group,/etc/shadow,/etc/sudoers,/etc/sysconfig/iptables,/var/spool/ Cron/root, etc.6) Disable ping (echo 1 >/proc/sys/net/ipv4/icmp_echo_ignore_all)Today we mainly say the server security login whitelist settings, through the following two ways:1) iptables SSH port restrictions;2)/etc/hosts.allow and/etc/hosts.deny res

; when other packets of this request arrive, they are also forwarded to the selected server. In the content-based request distribution technology, the server can provide different services. When a customer requests arrive, the scheduler can select the server to execute the request based on the request content. All operations will be completed in the core space of

The following is the "high-performance Linux server Building combat Ⅱ" a book or typographical errors, if found to have related error information, I will be published here, but also hope that you can find the error message to me, thank you for the support of readers! Your support is my greatest power to improve the book!1, 30th pageSecond Small segment: 2, install ChkrootkitWill[[

identity source using ${user} User Login System ------------------------------------------------------------- Systeminformation Host name: $HOSTNAME kernel version: $Kernel _version system Elapsed time: $Up _runtime Last restart time: $Up _lastime Current number of users logged in: $Login _user Last Login user: $Last _user-------------------------------------------------------- ----- "}; head>/tmp/.loginmailtitle= "host: ' echo $HOSTNAME ' login prompt (' date ' +%f%T "')" body= ' Cat/tmp/

1. Install the Apache serverWhen installing red hat linux 9.0, you will be prompted whether to install the Apache server. If you are not sure whether the installation is successful, enter the following command in the terminal command window: [Root @ ahpeng root] rpm-Qa grep httpd If the result is displayed as a httpd-2.0.40-21, it indicates the systemThe Apache server