Quick HOWTO Ch. Configuring Linux Mail Servers. Introduction. Email is an important part of any Web site you create. In a home environment, a free web based email service may be sufficient, but if you are running a business, then a dedicated mail server will probably be required. This chapter will show you how to use sendmail to create a mail server that will relay your mail to a remote users mailbox or incoming mail to a local mail box. How To Install Cpan In Perl A Variable That Starts' title='How To Install Cpan In Perl A Variable That Starts' />Youll also learn how to retrieve and send mail via your mail server using a with mail client such as Outlook Express or Evolution. Debian Ubuntu Differences. How To Install Cpan In Perl A Variable That Starts' title='How To Install Cpan In Perl A Variable That Starts' />This chapter focuses on Fedora Cent. OS Red. Hat for simplicity of explanation. Whenever there is a difference in the required commands for Debian Ubuntu variations of Linux it will be noted. The universal difference is that the commands shown are done by the Fedora Cent. OS Red. Hat root user. With Debian Ubuntu you will either have to become root using the sudo su command or you can temporarily increase your privilege level to root using the sudo lt command command. Here is an example of how to permanently become root. Here is an example of how to temporarily become root to run a specific command. The first attempt to get a directory listing fails due to insufficient privileges. The second attempt succeeds when the sudo keyword is inserted before the command. Permission denied. Chapter 4 Processing Forms and Sending Mail. Most forms you create will send their data using the POST method. POST is more secure than GET, since the data isnt. MYD. rw rw 1 mysql mysql 4. MYI. rw rw 1 mysql mysql 9. Now that you have got this straight, lets continue with the discussion. Introduction. Email is an important part of any Web site you create. In a home environment, a free web based email service may be sufficient, but if you are running a. Configuring Sendmail. One of the tasks in setting up DNS for your domain my site. MX record in the configuration zone file to state the hostname of the server that will handle the mail for the domain. The most popular Unix mail transport agent is sendmail, but others, such as postfix and qmail, are also gaining popularity with Linux. The steps used to convert a Linux box into a sendmail mail server will be explained here. How Sendmail Works. As stated before, sendmail can handle both incoming and outgoing mail for your domain. Take a closer look. Incoming Mail. Usually each user in your home has a regular Linux account on your mail server. Mail sent to each of these users usernamemy site. Linux account. Mail isnt actually sent directly to the users PC. Users retrieve their mail from the mail server using client software, such as Microsofts Outlook or Outlook Express, that supports either the POP or IMAP mail retrieval protocols. Linux users logged into the mail server can read their mail directly using a text based client, such as mail, or a GUI client, such as Evolution. Linux workstation users can use the same programs to access their mail remotely. Outgoing Mail. The process is different when sending mail via the mail server. PC and Linux workstation users configure their e mail software to make the mail server their outbound SMTP mail server. If the mail is destined for a local user in the mysite. If the mail is being sent to another domain, sendmail first uses DNS to get the MX record for the other domain. It then attempts to relay the mail to the appropriate destination mail server using the Simple Mail Transport Protocol SMTP. One of the main advantages of mail relaying is that when a PC user A sends mail to user B on the Internet, the PC of user A can delegate the SMTP processing to the mail server. How To Install Cpan In Perl A Variable That Starts' title='How To Install Cpan In Perl A Variable That Starts' />Note If mail relaying is not configured properly, then your mail server could be commandeered to relay spam. Simple sendmail security will be covered later. Sendmail Macros. When mail passes through a sendmail server the mail routing information in its header is analyzed, and sometimes modified, according to the desires of the systems administrator. Using a series of highly complicated regular expressions listed in the etcmailsendmail. In recognition of the complexity of the etcmailsendmail. These are then interpreted by a number of macro routines to create the sendmail. After editing sendmail. Learn how to setup an LCD touchscreen on the Raspberry Pi in this step by step tutorial that makes it easy for anyone. Description. Perl DBIdriver for Teradata. NOTEThis site describes the GPL formerly commercial version of DBDTeradata. The CPAN version provides a limited subset. NXLOG Community Edition Reference Manual for v2. Botond Botyanszki. Setting up qmailremote for SMTP Authentication. There are two Use Cases to consider allowing qmailremote to support SMTP Authentication A local user on the system. A QuickStart Guide. The following is a quick start guide to OpenLDAP Software 2. Standalone LDAP Daemon, slapd8. It is meant to walk you through. Each sendmail. mc directive starts with a keyword, such as DOMAIN, FEATURE, or OSTYPE, followed by a subdirective and in some cases arguments. A typical example is. As stated before, sendmail can handle both incoming and outgoing mail for your domain. Take a closer look. FEATUREvirtusertable,hash o etcmailvirtusertable. The keywords usually define a subdirectory of usrsharesendmail cf in which the macro may be found and the subdirective is usually the name of the macro file itself. So in the example, the macro name is usrsharesendmail cffeaturevirtusertable. Notice that sendmail is sensitive to the quotation marks used in the m. They open with a grave mark and end with a single quote. FEATUREmasqueradeenvelopednl. Some keywords, such as define for the definition of certain sendmail variables and MASQUERADEDOMAIN, have no corresponding directories with matching macro files. The macros in the usrsharesendmail cfm. Once you finish editing the sendmail. If there have been no changes to the files in etcmail since the last time make was run, then youll get an error like this. Nothing to be done for all. The make command actually generates the sendmail. Bluetooth Hack Tools For Symbian Applications. The m. 4 usage is simple, you just specify the name of the macro file as the argument, in this case sendmail. Ill discuss many of the features of the sendmail. Installing Sendmail. Most Red. Hat and Fedora Linux software product packages are available in the RPM format, whereas Debian and Ubuntu Linux use DEB format installation files. When searching for these packages remember that the filename usually starts with the software package name and is followed by a version number, as in sendmail 8. For help on downloading and installing the required packages, see Chapter 6, Installing Linux Software. Note You will need to make sure that the sendmail, sendmail cf, and m. Managing the sendmail Server. Managing the sendmail daemon is easy to do, but the procedure differs between Linux distributions. Here are some things to keep in mind. Firstly, different Linux distributions use different daemon management systems. Each system has its own set of commands to do similar operations. The most commonly used daemon management systems are Sys. V and Systemd. Secondly, the daemon name needs to be known. In this case the name of the daemon is sendmail. Armed with this information you can know how to. Start your daemons automatically on booting. Stop, start and restart them later on during troubleshooting or when a configuration file change needs to be applied. For more details on this, please take a look at the Managing Daemons section of Chapter 6 Installing Linux Software. Note Remember to configure your daemon to start automatically upon your next reboot. How To Restart Sendmail After Editing Your Configuration Files. In this chapter, youll see that sendmail uses a variety of configuration files that require different treatments for their commands to take effect. This little activate sendmail. Script usrlocalbinactivate sendmail. It first runs the make command, which creates a new sendmail. Makefile. It then generates new e mail aliases with the newaliases command, this will be covered later, and then restarts sendmail. The script also restarts spamassassin, a package that will be discussed later. Use this command to make the script executable. Youll need to run the script each time you change any of the sendmail configuration files described in the sections to follow. Configuring e. Streamer Cisco. Configuring e. Streamer. After you create a client application, you can connect it to the e. Streamer server, start the e. Streamer service, and begin exchanging data. NoteAn e. Streamer server is a Defense Center or managed device version 4. Streamer service is running. Perform the following tasks to manage e. Streamer and client interaction1. Enable e. Streamer on the e. Streamer server. See Configuring e. Streamer on the e. Streamer Server for information about allowing access to the e. Streamer server, adding clients, and generating authentication credentials to establish an authenticated connection. If required, manually run the e. Streamer service e. Streamer. You can stop, start, and view the status of the service, and use command line options to debug client server communication. See Managing the e. Streamer Service for more information. Optionally, to use the e. Streamer reference client to troubleshoot a connection or data stream, set up the reference client on the computer where you plan to run your client. See Configuring the e. Streamer Reference Client. Configuring e. Streamer on the e. Streamer Server. Any. Before the Defense Center or managed device you want to use as an e. Streamer server can begin streaming events to a client application, you must configure the e. Streamer server to send events to clients, provide information about the client, and generate a set of authentication credentials to use when establishing communication. You can perform all of these tasks from the Defense Center or managed device user interface. See the following sections for more information Configuring e. Streamer Event Types. Any. You can control which types of events the e. Streamer server is able to transmit to client applications that request them. Available event types on a managed device or a Defense Center include Intrusion events. Intrusion event packet data. Intrusion event extra data. Available event types on a Defense Center include Discovery events this also enables connection eventsCorrelation and white list events. Impact flag alerts. User activity events. Malware events. File events. Note that the primary and secondary in a stacked 3. D9. 90. 0 pair report intrusion events to the Defense Center as if they were separate managed devices. If you configure communication with an e. Streamer client on the primary in a 3. D9. 90. 0 stack, you also need to configure the client on the secondary the client configuration is not replicated. Similarly, when you delete the client, delete it in both places. If you configure an e. Streamer client for a Defense Center managing 3. D9. 90. 0s in a stack configuration, note that the Defense Center reports all events received from both managed devices, even if the same event is reported by both. If you configure an e. Streamer client on a Defense Center in a high availabilityconfiguration, the client configuration is not replicated from the primary Defense Center to the secondary Defense Center. To configure the types of events captured by e. Streamer. System Local Registration. The e. Streamer page appears with the. Streamer Event Configuration. Step 3Select the check boxes next to the types of events you want e. Streamer to capture and forward to requesting clients. Note that if a check box is currently unchecked, that data is not being captured. Unchecking a check box does not delete data that has already been captured. You can select any or all of the following on a Defense Center or managed device. Intrusion Events. Intrusion Event Packet Data. Intrusion Event Extra Data. URI associated with the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer. You can also select any or all of the following on a Defense Center. Discovery Events. Correlation Events. Impact Flag Alerts. Defense Center. User Activity Events. Intrusion Event Extra Data. URI associated with the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer. NoteNote that this controls which events the e. Streamer server can transmit. Your client application must still specifically request the types of events you want it to receive. For more information, see Request Flags. Step 4Click. Your settings are saved and the events you selected will be forwarded to e. Streamer clients when requested. Adding Authentication for e. Streamer Clients. Any. Before e. Streamer can send events to a client, you must add the client to the e. Streamer servers peers database. You must also copy the authentication certificate generated by the e. Streamer server to the client. To add an e. Streamer client. Streamer. The e. Streamer page appears. Step 2Click. The Create Client page appears. Step 3In the. field, enter the host name or IP address of the host running the e. Streamer client. NoteIf you use a host name, the host input server must be able to resolve the host to an IP address. If you have not configured DNS resolution, you should configure it first or use an IP address. Step 4If you want to encrypt the certificate file, enter a password in the. Step 5Click. The e. Streamer server allows the client computer to access port 8. Defense Center and creates an authentication certificate to use during client server authentication. The e. Streamer Client page re appears, with the new client listed under. Streamer Clients. Step 6Click the download icon. Step 7Save the certificate file to the directory used by your client computer for SSL authentication. The client can now connect to the Defense Center. TipTo revoke access for a client, click the delete icon next to the host you want to remove. Note that you do not need to restart the host input service on the Defense Center access is revoked immediately. Configuring the e. Streamer Reference Client. The. reference client. Streamer SDK is a set of sample client scripts and Perl modules included to illustrate how the e. Streamer API can be used. You can run them to familiarize yourself with e. Streamer output, or you can use them to debug problems with installations of your custom built client. For more information on setting up the reference client, see the following sections Setting Up the e. Streamer Perl Reference Client. To use the e. Streamer Perl reference client, you must first configure the sample scripts to fit your environment and requirements. For more information, see the following sections Understanding the e. Streamer Perl Reference Client. You can download the. Streamer. SDK. Streamer Perl reference client, from the Cisco support site. The following files are included in the. Streamer. SDK. This MIB file is used by the. SNMP. This Perl module contains definitions of discovery message record blocks. This Perl module contains the functions called by the Perl clients. This Perl module parses the client certificate and allows the client to connect to the e. Streamer server. This Perl module contains definitions of discovery data blocks. You can use this Perl script to test an intrusion event request over an SSL connection. This Perl module prints intrusion events to a comma separated value CSV format. This Perl module prints events to a human readable format. This Perl module sends events to the specified SNMP server. This Perl module stores packet captures as a pcap file. This Perl module sends events to the local syslog server. Configuring Communications for the e. Streamer Reference Client.