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smtp+pop3+imap+tls+webmail+anti spam+anti virus
by Eugeneapolinary Ju 23 Nov '09

23 Nov '09

hi! does anyone has a good howto, docs how to set up an smtp, pop3, imap server, with webmail, and has anti virus solution, and even spam filtering? :D [plus secure connection for the clients :D ] wich softwares are the best for this? [e.g.: "vsftpd is the most secure ftp server"..] users would be from /etc/passwd [so not virtual users] thank you! p.s.: I've already googled :( :\

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What's wrong with yum-priorities?
by Dennis Kibbe 23 Nov '09

23 Nov '09

"The upstream maintainer of yum, Seth Vidal, had the following to say about 'yum priorities' in September 2009: Gosh, I hope people do not set up yum priorities. There are so many things about priorities that make me cringe all over. It could just be that it reminds me of apt 'pinning' and that makes me want to hurl." This note was placed on the wiki (PackageManagement/Yum?Priorities) without any explanation why yum-priorities isn't a good idea. yum-priorities doesn't appear in RHEL 5.4 but protectbase does. Is that the better choice and if so why? Thanks, Dennisk -- "Free as in Freedom" Free Software Foundation

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Inquiry:How to enable "NAT" on CentOS 5 ?
by hadi motamedi 23 Nov '09

23 Nov '09

Dear All On my CentOS 5 , I installed the Asterisk 1.4.13 and DECT application software and then when I want to try for "NAT" I issue as the followings : #iptables -t nat -A POSTROUTING -s 10.20.30.0/24 -o eth0 -j MASQUERADE But it didn't get through . So I checked if the "NAT" is enabled on my CentOS server , as the followings : #echo "1" > /proc/sys/net/ipv4/ip_forward But still I cannot try for "NAT" . Can you please let me know which other setings maybe influenced and need to be checked for enabling the "NAT" ? Thank you in advance

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yum-priorities (recap)
by Dennis Kibbe 23 Nov '09

23 Nov '09

Thanks for everyone's input. I had been under the impression and was passing that impression on to my students. The take-away here seems to be that once you start mixing official and unofficial repos anything can happen. dennisk -- "Free as in Freedom" Free Software Foundation

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dnsmasq - where to use? where not?
by Rob Kampen 22 Nov '09

22 Nov '09

Hi list, On updating my server today, I noted that dnsmasq was updated, I do not recall installing this onto my server as it is running bind/named and dhcpd, thus why does it need dnsmasq? So I did a $> sudo yum remove dnsmasq to find out what rpm / yum thinks about it - I get a list of NetworkManager(-glib) removals evolution(-connector) removals krb5-auth-dialog also...... I think I can live without NetworkManager and evolution on this server, but why krb5-auth-dialog?? Any suggestions appreciated. TIA Rob

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crontab problem
by Susan Day 22 Nov '09

22 Nov '09

Hi; I have the following in crontab -eu root: @daily /usr/local/bin/mysql-backup- daily.sh @weekly /usr/local/bin/mysql-backup-weekly.sh @monthly /usr/local/bin/mysql-backup-monthly.sh [root@13gems globalsolutionsgroup.vi]# ls /usr/local/bin/mysql-* /usr/local/bin/mysql-daily.sh /usr/local/bin/mysql-monthly.sh /usr/local/bin/mysql-weekly.sh These scripts worked on another server. The daily writes to: /usr/backup/database/mysql-backups/mysql-backup-dailys/ However, a day later, nothing is there. Please advise. TIA, Suzie

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system time automatically fowards in time and then comes back to normal
by ankush grover 22 Nov '09

22 Nov '09

Hi friends, I am running Nagios 2.7-1 on Centos 5.0 32-bit hosted on Vmware ESX 4.0. The issue I am seeing on the server is sometimes nagios is showing the below messages in /var/log/messages and as the system time gets changed some false alarms gets generated. I searched it on the google but I am not able to find the correct solution. I even posted on the nagios forum and they asked me to see elsewhere why the server shitfs so much before looking at nagios. Nov 21 20:37:12 linuxmonitoring nagios: Warning: A system time change of 4398 seconds (forwards in time) has been detected. Compensating... Nov 21 19:23:54 linuxmonitoring nagios: Warning: A system time change of 4398 seconds (backwards in time) has been detected. Compensating.. Earlier this server was syncing time through ntp daemon and below is the ntp.conf file. Now I have set a cronjob which sync the time with the ntp server every 5 minutes but still the problem persist. ntp.conf file restrict default ignore restrict 127.0.0.1 driftfile /var/lib/ntp/drift broadcastdelay 0.008 #authenticate yes keys /etc/ntp/keys restrict 172.16.6.3 nomodify notrap noquery server 172.16.6.3 restrict 172.16.6.2 nomodify notrap noquery server 172.16.6.2 Please see the output of hwclock and date at the same time. hwclock Sat 21 Nov 2009 08:19:02 PM IST -0.496922 seconds date Sat Nov 21 20:19:55 IST 2009 Please advice what I need to do to fix this error. Regards Ankush

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Re: [CentOS] Dynamic DNS update
by Les Bell 22 Nov '09

22 Nov '09

"Joseph L. Casale" <JCasale(a)activenetwerx.com> wrote: >> Does anyone know of an existing script that wont update the bind zone unless the ip has actually changed rather than me hacking one out and reinventing the wheel? << I did this one years ago - see http://www.lesbell.com.au/Home.nsf/web/Dynamic+DNS+Updates+with+TSIG+for+Se… Best, --- Les Bell [http://www.lesbell.com.au] Tel: +61 2 9451 1144

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Dynamic DNS update
by Joseph L. Casale 22 Nov '09

22 Nov '09

I am using a /etc/dhclient-exit-hooks script to update a bind host record for a remote server so I can gain admin access to it when its dynamic ip changes. Does anyone know of an existing script that wont update the bind zone unless the ip has actually changed rather than me hacking one out and reinventing the wheel? Thanks! jlc

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Sendmail "Queued mail for delivery"
by Timothy Murphy 22 Nov '09

22 Nov '09

I see that mail sent from a remote computer never leaves the computer, the last entry in /var/log/maillog being "Queued mail for delivery". 1. What is likely to cause this message? I know I registered with my remote mail server with a different name to my name on the computer. Is that likely to be the cause of my problem? And if so, what is the solution? Or is there any other likely cause? Incidentally, I can telnet the mail server: --------------------------------------- m@althea ~]$ telnet out.alice.it 25 Trying 85.33.2.55... Connected to out.alice.it (85.33.2.55). Escape character is '^]'. 220 FBCMCL01B06.fbc.local Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at Sun, 22 Nov 2009 01:02:20 +0100 ^] telnet> quit Connection closed. --------------------------------------- 2. Where incidentally is the mail queued for delivery? I don't see it in /var/cache/ . Any suggestions or enlightenment gratefully received. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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