Linux Magazine (Munich) www.linux-magazine.com ... which calls itself 'the magazine for advanced Linux know-how'
o Security links of various major distros http://www.debian.org/security/ http://www.mandrakesecure.net http://www.redhat.com/errata/ http://www.redhat.com/mailing-lists/ http://www.sco.com/support/security/ http://www.slackware.com/lists/ http://www.suse.de/uk/private/support/security/
o NETWORKING MADE EASY: In today's high tech world, we all have to deal with computers. Whether it is part of a multinational's work group or just a small office/home office, the chances are we need at some point to interconnect to a network. Here GNU/Linux rules above all others, writes John Southern. Also - Linux in LANS - Network configuration under Red Hat 8.0 - The SuSE Distribution Network configuration (YaST) - Using Windows shares - Samba share configuration - Integrating NT4 domains with Samba - User management and authentication for Samba
WORTH NOTING: Microsoft will soon be withdrawing its support for Windows NT4, but Samba for Linux offers a free alternative that provides both users and administrators with a familiar environment.
o CHECK POINT SecurePlatform with firewall: CheckPoint's SecurePLatform provides a hardened Red Hat Linux with Check Point's own Firewall-1NG and allows you to install a firewall yourself within a few minutes -- without any assistance from systems integrators or consultants.
o MS OFFICE UNDER LINUX: Codeweavers, the makers of Crossover Office -- with more than a little help from Wine -- promise to get the Microsoft Office Suite and a few other Windows programs running on Linux without any hassle. www.codeweavers.com Single license price approx US$ 55.
o SOFT HARDWARE, THE BOCHS PC EMULATOR: Though the FLOSS community has developed free alternatives to complex Office suites, PC emulators have proven challenging so far. Despite poor performance, the Bochs ('box') project is at least interesting for test purposes. http://bochs.sourceforge.net
o TIDYING UP DOCUMENTS: Part 2 of the LaTeX series looks at putting some structure into your documents. Divide documents into sections and chapters, creating tables of contents, using various list formats and tables, and working with cross-references and footnotes.
o BLOCKS AND MESSAGES: The SMB (Server Message Block) protocol specifies how Windows computers communicate on a network. SMB provides access to files, printers, serial lines, and communication channels, such as named pipes and mailshots. Samba is a free SMB implementation. Just what is SMB -- an intro www.samba.org/cifs/docs/what-is-smb.html
o MySQL BACKUP: Admins often tend to use mysqldump, a component from the MySQL package, when they need to backup MySQL data. But a more convenient method is MySQL backup.
o PARANOIA FOR BEGINNERS: Info security on GNU/Linux. http://www.kerneli.org/ http://loop-aes.sourceforge.net/ http://gsu.linux.org.tr/wipe/ http://freshmeat.net/projects/securedelete/ http://wipe.sourceforge.net/ http://www.outguess.org/ http://wwwrn.inf.tu-dresden.de/~westfeld/f5.html http://linux01.gwdg.de/~alatham/stego.html http://www.erikyyy.de/tempest/ http://tinfoihat.shmoo.com http://www.zapatopi.net/afdb.html
o KEEPING IN SYNC: rsync program allows you to synchronise local or remote files and directories using the "rsync remote-update protocol" that first checks for differences between source and target before data transfer commences, thus minimizing transfer volume.
o Stadrin is an effective enterprise tool for raising security levels, esp where the static passwords authentication systems are no longer sufficient.
o INTERACTIVE 3D worlds with Coin and Qt.
o LinuxBIOS Project: Putting GNU/Linux on your motherboard.
o KNewsticker DELIVERS THE latest news hot off the press.
o Icewm, YOU CAN use an oldermachine as a graphical desktop with light-weight alternative window managers (blackbox, fluxbox, aewm, pwm, larswm) and panels (fbpanel, hpanel, fspanel).
o COLOUR CODES: syntax highlighting can improve read- ability when integrating your source code into a website or document.
o CREATING CD images with mkisofs & dd
o EVER SINCE WOODY, Debian GNU/Linux 3.0 hit the scene, users have started turning to the flagship amongst free distributions. Some help to counter initial obstacles from Dr Linux.
o BraveGNUWorld by Georg C F Greve looks at Ninvaders (clone of the console classic Space Invaders), GNOME-Annotate (make notes while working with a web browser), RULE (helping GNU/Linux work on earlier generation hardware) - http://dettus.dyndns.org/ninvaders/ - http://home.swipnet.se/darshiva/software.html - http://www.rule-project.org - http://brave-gnu-world.org
o ON THE CD: Kolab server (Germany's IT security federal agency has contracted three firms to provide a Free Software groupware solution accessible with Windows running Outlook and GNU/Linux running KDE clients), Amaya (browsing/authoring tool to publish docs on the Web... WYSIWYG style of interface), RH8 updates, games (3D Open GL Action RPG Space Simulator...)
o Next month: - Groupware - Mail User Agents - Multi distributions - Lindows - Bootable CDs
o SEND LETTERS and feedback to letters@linux-magazine.com
Hi
I restarted my server after 243 days. Meanwhile no change to IP address,sendmail.cf or any other thing.
Now sendmail accepts mails from outside network and delivers properly. but from my local network it does not accept mails.
My access file says ----------------------------------------------------------- 127 RELAY 192.168.1 RELAY 192.168.10.26 RELAY 192.168.10.19 RELAY workz.co.in RELAY workz.com RELAY spock.workz.com RELAY chekov.workz.com RELAY ------------------------------------------------------------
192.168.10.26 [spock.workz.com ] 192.168.10.19 [ chekov.workz.com ] are my local machines .
the debug mode sendmail says ----------------------------------------------------------------- checkcompat(to=richardc@workz.co.in, from=richardc) openmailer: TCP unitek.co.in. richardc@workz.co.in... Connecting to mail.abriasoft.com. via esmtp... makeconnection (mail.abriasoft.com. [64.11.117.27].25 (2)) makeconnection: fd=7 Connect failed (Connection refused by mail.mymailserver.com.) openmailer: makeconnection => stat=75, errno=111 -----------------------------------------------------------------
Any help will be highly appriceated
Richard V. Correia
Connect failed (Connection refused by mail.mymailserver.com.) openmailer: makeconnection => stat=75, errno=111
can u connect to this server manually on port 25...using telnet try to connect and see if you can excecute any smtp commands. are you sure this server admin has not blocked your site? nowdays many smtp server require authorization before sending mails to avoid spams...make sure the policy for above server is not changed. when have u sent last message using this connection...
Kiran Ghag Software Engineer @ Patni Computers, India Work Phone: +91 (22) 2829 1454 Extension 5236 Web Page: http://kiran7.freeservers.com _____
ASCII: The control code for all beginning programmers and those who would become computer literate. Etymologically, the term has come down as a contraction of the often-repeated phrase "ascii and you shall receive." -- Robb Russon
Connect failed (Connection refused by mail.mymailserver.com.) openmailer: makeconnection => stat=75, errno=111
can u connect to this server manually on port 25...using telnet try to connect and see if you can excecute any smtp commands. are you sure this server admin has not blocked your site? nowdays many smtp server require authorization before sending mails to
avoid
spams...make sure the policy for above server is not changed. when have u sent last message using this connection...
Yes, I can connect to mailserver manually using SMTP and mail delivers perfectly. Even Pine works without any problem.
I would like to mention one small issue here. [All IP/domain are fake]
my hosts has entry for mymailserver.com 192.168.10.25 This is for internal network.
When I make a dns query mymailserver.com 202.56.230.146
from my internal network I cannot connect to 202.56.230.146. So I get error "connection refused from mymailserver.com
Pine must be using /etc/hosts entry to find internal IP, so it works perfect.
Is there any way so that I can tell sendmail not to make a nslookup for mymailserver.com and refer /etc/hosts. my hosts.conf has order hosts,bind
Richard
On Wed, 26 Mar 2003, Richard Unitek wrote:
I would like to mention one small issue here. [All IP/domain are fake]
my hosts has entry for mymailserver.com 192.168.10.25 This is for internal network.
When I make a dns query mymailserver.com 202.56.230.146
This is so because mymailserver.com is owned by Tribeca Internet Initiatives Inc. You cannot use that name for your mail server - whether it is public or private. Change that name. Use something like mymailserver.local or mymailserver.<yourcompanyname> or mymailserver.<your local domain name>
Philip
On Wed, Mar 26, 2003 at 07:30:39AM +0530, Richard Unitek wrote:
I restarted my server after 243 days. Meanwhile no change to IP address,sendmail.cf or any other thing.
Now sendmail accepts mails from outside network and delivers properly. but from my local network it does not accept mails.
Since you mentioned that this started after you restarted the server, I guess the firewall must be the most likely culprit. The scripts for ipchains/iptables must be lurking around in your rc-scripts although they were disabled during normal operation.
Sameer.
-
Frederick Noronha (FN) -
Kiran Ghag -
Philip S Tellis -
Richard Unitek -
Sameer D. Sahasrabuddhe