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Text File | 1998-02-25 | 14KB | 294 lines

<HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"> <TITLE>Acorn Internet: Managing the mail server</TITLE> <META NAME="GENERATOR" CONTENT="Internet Assistant for Microsoft Word 2.04z"> </HEAD> <BODY> <TABLE WIDTH=100%> <TR><TD> <BODY bgcolor="#ffffff"><A NAME="_Toc401045830">6 Managing <A NAME="the">the</A> mail server</A> </TD><TD ALIGN="RIGHT"><A HREF="confbr"><IMG SRC="MiscImages/PREV" WIDTH="36" HEIGHT="36" BORDER="0"></A><A HREF="../Cover"><IMG SRC="MiscImages/START" WIDTH="36" HEIGHT="36" BORDER="0"></A><A HREF="prelms"><IMG SRC="MiscImages/CONTS" WIDTH="36" HEIGHT="36" BORDER="0"></A><A HREF="useml"><IMG SRC="MiscImages/NEXT" WIDTH="36" HEIGHT="36" BORDER="0"></A> </TD></TR> </TABLE> <HR> <H2><A NAME="Setting">Setting</A> up users and user groups</H2> You enter all user names (even your name if you are a single user). To do this, double-click on the !Connect icon in the Internet directory, to load !Connect. From !Connect's icon bar icon, choose the Menu option Admin/Users.... This will display the Users dialogue box: <IMG SRC="Diagrams/Img00021" WIDTH="411" HEIGHT="187> Enter each 'Username' in the User field. Usernames can be up to 19 characters long, passwords 10 characters. They should use only alpha and numeric characters. They are not case-sensitive (i.e., t works the same as T). For maximum security passwords should not be words found in the dictionary, and should include numbers as well as letters. If you are use POP3 mail delivery, you must create a user with the same name as your POP3 Username, as it is to this user that mail will be addressed. Users can change their passwords from the !Mail icon bar menu unless Lock password... is set. You may want to set this for shared accounts, where you don't want one user changing the password unilaterally. The System user option is for future expansion. Network users can save time entering a large number of users by first listing their names in a plain text or CSV (Comma Separated Value) file, then saving the text file into the Users dialogue box. You may already have such a list of users on your school administration system. Even DOS programs can often provide plain ASCII CSV data files, and your Acorn computer can read DOS floppy discs. The format of the text file to add users can be any one of the following (to remove users, prefix the line with a minus instead of a plus): <TT>+emailname password group Yes/No (Web) Yes/No (lockpassword) Yes/No (systemuser) fullname</TT> <TT>+emailname,password,group,Yes/No,Yes/No,Yes/No,fullname</TT> <TT>+"emailname","password","group","Yes/No","Yes/No","Yes/No","fullname"</TT> For example: Enter users to be included in the group 'all': <TT>+rjohnson xroads all yes no no Robert Johnson</TT> <TT>+cberry jonnybg00d all yes no no Charles Berry etc</TT> or <TT>+jpage,5tairway,all,yes,no,no,James Page etc</TT> Remove a user from the group 'Usixth': <TT>-"efitzgerald","manhattan","USixth","yes","no","no","Ella Fitzgerald"</TT> <H3>User groups</H3> In network use it is important to set up user groups, as it is by this mechanism that you can control access to particular newsgroups and email to and from specific locations. For single-user application, however, it is not necessary to set these up. <H2><A NAME="Managing">Managing</A> newsgroups</H2> Whenever !Connect connects with the service provider, articles from all newsgroups allowed are downloaded. If many newsgroups are allowed, this can involve a massive amount of data. It is therefore important to ensure that you only allow newsgroups in which you have a specific interest, and keep their numbers to a minimum. Otherwise, downloading could take many hours! Similarly, just the titles of all the newsgroups available make up a large file, so only the most commonly-used are included on the Acorn Internet software disc. These are listed in the file !Connect.Newsgroups. A very large Newsgroups file will consume a significant amount of RAM on your machine, so you may wish to remove unwanted lines inside the file (load it into Edit to do so). If you do want the complete up-to-date list, choose Update newsgroup list when next connected (see <A HREF="#disallowing" >Allowing and disallowing newsgroups</A>), but you do not have to leave this option switched on, as it will run up your connection charges unnecessarily. <H3><A NAME="_Ref400436267">Allowing and</A> <A NAME="disallowing">disallowing</A> newsgroups</H3> To allow or disallow a newsgroup, choose Admin/Newsgroups.... The following dialogue box will be displayed: <TABLE WIDTH=100%> <TR><TD WIDTH=440><IMG SRC="Diagrams/Img00028" WIDTH="427" HEIGHT="236"></TD> <TD><UL> <LI>Choose the group (single-users leave at All) <LI> Type in or choose via the list below the newsgroup to be allowed or disallowed. You can use wildcards (see below) <LI> Choose to download the complete list of newsgroups when connected (lengthy) <LI> Click on Allow, Disallow or Remove. Use the Adjust mouse button when dealing with more than one newsgroup. Remove will remove all access to a newsgroup. Disallow will disallow access to that user group only.</UL> In the list of newsgroups below, sub-groups will cascade when parent groups are chosen, making selection quicker </TD></TR> </TABLE> (The newsgroups themselves will only be loaded once you have connected to your service provider.) The menu which lists available newsgroups has a writable line at the top where you can enter the name of the newsgroup in which you are interested, or you can click on the newsgroup listed. If the server does not find the file `Newsgroups' inside the '!Connect' application, it will load a full list from the service provider. <H4>Using wildcards</H4> You can speed up the process of allowing and disallowing newsgroups by using wildcards when you specify newsgroups. This is useful because there are so many of them. Wildcards are (usually) single characters which stand in for several characters of a similar type. Two wildcards are available for describing newsgroups: <UL> <LI>* meaning any number and type of letter <LI><TT> <string> </TT> where <TT> string </TT> is any sequence of characters. </UL> So, <TT> comp.* </TT> would mean all the newsgroups which start <TT> comp. </TT> , such as <TT> comp.sys.acorn </TT> for example. <TT> <cultur> </TT> would signify all newsgroups with <TT> cultur </TT> anywhere in their title (such as culture and cultural). <TT> <politic> </TT> would cover all newsgroups with <TT> politic </TT> anywhere in their title (such as politics, politicians and political). <TT> <sex> </TT> could be used to disallow all newsgroups with <TT> sex </TT> anywhere in their title (including, for example, <TT> Essex </TT> ). <H3>Newsgroup expiry times</H3> You can configure how long news articles remain accessible. Obviously, very old articles lose their topicality and need to be deleted to make room for new ones. The default life for a news article is seven days, but this may be changed using Admin/Expiry times/Newsgroups. Newsgroups with a high volume of traffic might be set to keep their articles a shorter time than those with a low volume, for example, to avoid the hard disc filling up too quickly. <TABLE WIDTH=100%> <TR><TD WIDTH=350><IMG SRC="Diagrams/Img00029" WIDTH="338" HEIGHT="170"></TD> <TD><UL> <LI>Set the default expiry time for the system <LI> For specific newsgroups, set individual expiry times. You can use wildcards <LI> Confirm or cancel your choice</UL> </TD></TR> </TABLE> <H2><A NAME="Allowing">Allowing</A> and disallowing Web URLs</H2> You can allow or disallow a Web URL to a particular group of users in much the same way you censor Newsgroups. Choose Admin/URLs... and the following dialogue box will be displayed: <TABLE WIDTH=100%> <TR><TD WIDTH=290><IMG SRC="Diagrams/Img00030" WIDTH="281" HEIGHT="124"></TD> <TD><UL> <LI>Choose the group <LI> Type in or choose via the menu icon the URL to be allowed or disallowed. You can use wildcards (see above) <LI> Click on Allow or Disallow. Use the Adjust button when dealing with more than one URL</UL> </TD></TR> </TABLE> <H2><A NAME="Mail">Mail</A> statistics</H2> A number of mail reports are available to the network manager to help judge the performance of the system, how much it is being used, and by whom. These reports are available from the menu option Reports/Statistics, and are largely self-explanatory: <UL> <LI>Allowed groups (allowed newsgroups, by user, group and total). Subscribed groups in the case of the single-user version of Acorn Internet software. <LI>Connect times (a list of recent connection times) <LI>Disc usage (by user, group and total) <LI>Censorship (a list of disallowed addresses by user group). </UL> Each of these subjects leads to a Save dialogue box - drag the textfile icon to !Edit to view the report, or to a printer to print it out. <H2><A NAME="Displaying">Displaying</A> the server log</H2> You can display the Acorn Internet software server communications log by choosing Show log from the Connect main menu: <IMG SRC="Diagrams/Img00031" WIDTH="389" HEIGHT="68"> The server log tracks the activities of the server as they occur. This is useful for network management and tracing problems. <H3>Saving the server log</H3> When you quit Connect, the current log is saved to disc as the file Log inside !Connect. <H3>Log file messages</H3> Do not be alarmed if some of the text in the log appears truncated- "Got rotocol" for example. This is often because service providers use a mixture of upper and lower case letters, the first letter being ignored when matching text strings. RMEnsure messages are displayed complete, together with their associated error messages, but this does not necessarily mean than an error has occurred. <H2><A NAME="Finger">Finger</A></H2> Finger, available from the Connect main menu, is a convenient way of interrogating a service provider. <CENTER><IMG SRC="Diagrams/Img00032" WIDTH="268" HEIGHT="85"></CENTER> Typing in: <TT><username>@post.demon.co.uk</TT> for example, would return details of any mail waiting for <TT><username></TT> at the service provider demon. <H2><A NAME="Quitting">Quitting</A> Connect</H2> Exit from Connect by choosing Quit from the !Connect icon bar menu. <H2><A NAME="Saving">Saving</A> space</H2> A list of the more commonly-accessed newsgroups is supplied. It is held in the file !Connect.Newsgroups. If you want a complete list, simply delete this file, and !Connect will load another from the service provider next time you connect. However, this list is large, (approximately 200K) and you can save space if you subsequently delete entries in which you are unlikely to have any interest. Deletion can be performed by dragging the file to !Edit, manually deleting unwanted sections, and then saving the file again. <A HREF="confbr"><IMG SRC="MiscImages/PREV" WIDTH="36" HEIGHT="36" BORDER="0"></A><A HREF="../Cover"><IMG SRC="MiscImages/START" WIDTH="36" HEIGHT="36" BORDER="0"></A><A HREF="prelms"><IMG SRC="MiscImages/CONTS" WIDTH="36" HEIGHT="36" BORDER="0"></A><A HREF="useml"><IMG SRC="MiscImages/NEXT" WIDTH="36" HEIGHT="36" BORDER="0"></A> </BODY> </HTML>