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Problem booting in CentOS 5.6
by John J. Boyer 19 Aug '11

19 Aug '11

The last update for CentOS 5.6 included a new kernel. Now when I boot there is a message on the console saying "mounting cifs: Password". If someone presses enter it continues to boot. This is very inconvenient, since I access my machine by ssh. Is there some way to get it to boot without pausing? Thanks, John -- John J. Boyer; President, Chief Software Developer Abilitiessoft, Inc. http://www.abilitiessoft.com Madison, Wisconsin USA Developing software for people with disabilities

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which firewall to automatically block bandwidth abusers?
by Rudi Ahlers 19 Aug '11

19 Aug '11

Hi, I'm looking for a firewall (preferably on Linux / UNIX) that could automatically block bandwidth abusers as soon as a connection goes over a certain speed, or limit - i.e. either more than say 3Mb/s or 10GB in a giving period (like weekly / monthly). But, I need it to block the IP to, or where the traffic comes from, or goes to. i.e. a user logs into a web server and upload a LOT of data, then the firewall should block him, but not other people. Or, someone uploads a small bit of data but downloads a lot of data and then get's blocked. But I need to set thresholds And I should be able to exclude certain IP's / domains from the limits. Does this make sense? Can this be done with iptables? If so, how? If not, what else could I use for this? A normal DDOS prevention firewall doesn't really work since it only blocks traffic coming in. But I need to limit traffic going out as well. The servers behind the firewall will serve mail, http, ftp, sql and SSH -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Two Samba Servers and Rsync
by Railic Njegos 19 Aug '11

19 Aug '11

Hi all, I plan to implement two file servers on CentOS 6 i a two remote location. i need to backup all data from second server on first. First server will be a virtual machine on Esxi, and second server will be physical machine. I plan to use rsync to sync data from second to first server. It is OK ? Any suggestion ? Njegos

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Change bash colours like in VIM
by Dotan Cohen 19 Aug '11

19 Aug '11

In VIM one can easily change colours with ":set backgorund=dark". This doesn't actually change the background, but rather uses a colour scheme that is designed for a dark background. Is there any quick command like this for bash? I don't want to edit the whole config file if there is a quick way to get a better colour scheme. Thanks. -- Dotan Cohen http://gibberish.co.il http://what-is-what.com

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Problem getting eth0 up
by Alfred von Campe 19 Aug '11

19 Aug '11

I'm just starting to test CentOS 6 in our environment, and as a first step did a basic install from DVD (Desktop target, all defaults). Next I will try to automate the installations as I did for CentOS 5 using the anakonda-ks.cfg file generated by the manual install. However, I can't wrap my brain around the new NetworkManager to get it to configure the eth0 interface to obtain an IP address from our DHCP server. I've seen the FAQ on the wiki and the interface is up, but it doesn't get an IP address. I've done the installation from DVD multiple times now, each time with the same result. What am i missing? Alfred

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cr repository when running your own mirror
by Christian Anthon 18 Aug '11

18 Aug '11

Hi, what is the right way to deal with the new cr repository for centos 5 when you are running your own mirror. In particular the following statement I don't fully understand: - Once 5.7 is released, the 5.6/cr/ repositories will be removed ( they will not be available on vault.centos.org ) Christian.

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CentOS 6 and IPv6 neighbor proxy
by Helmut Drodofsky 18 Aug '11

18 Aug '11

To route a subnet in ipv6 there are two possibilities: - add route commands for the subnet in each computer - or use neighbor proxy in the router server I prefer neighbor proxy. So I have to activate neighbor proxy in the router: sysctl -w net.ipv6.conf.all.proxy_ndp=1 and I have to add entries for each client in the subnet like ip -6 neigh add proxy 2001:0:0:1:211:d8ff:fe97:3273 dev eth0 This works well but is lost on reboot. For the sysctl command there is /etc/sysctl.conf for permanent configuration. If I create a file route-eth0 in the directory /etc/sysconfig/network-scripts/ with the above ip neighbor command, the interface eth0 is immediately down. Restart of network brings: Bringing up interface eth0: Error: Unknown connection: 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03. [FAILED] All Interfaces are NetworkManager controlled. Ask for help: - where can I store the command for a permanent configuration? - Shall I not further use NetworkManager? Thank you for help in advance Helmut

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using posfix on the local LAN, with internet FQDN
by Rudi Ahlers 18 Aug '11

18 Aug '11

Hi all, I hope someone can help me with this please. One of our clients has an in-house Postfix mailserver which basically downloads mail for the individual users from our mail server hosted on the web using fetchmail. They use our SMTP server to send mail. Their email clients are then setup to get & send mail from the server, on 192.168.2.254 (for POP3 & SMTP). All mail between them on the local LAN gets send to each other via the server, and not the internet. This works quite well, but as soon as someone sends mail from the Linux server directly (it has webmin + usermin installed and has a basic webmail interface for when they're out of the office) it sends mail using the local machine name, instead of the domain name. for example, mail comes from esther(a)ser001.rewards.local. How do I tell Postfix to automaticlly send mail from <user>@<theirdomain.com> instead? Sorry for asking this, but I don't know Postfix very well and don't know what to call to, to search on google. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Re: [CentOS] using posfix on the local LAN, with internet FQDN
by Leen de Braal 18 Aug '11

18 Aug '11

> On Thu, Aug 18, 2011 at 3:00 PM, Leen de Braal <ldb(a)braha.nl> wrote: >> myhostname = mail.braha.nl >> myorigin = $mydomain >> >> Think the second one is what you need. >> >>> >> L. de Braal >> BraHa Systems >> NL - Terneuzen >> T +31 115 649333 >> F +31 115 649444 >> >> _______________________________________________ > > > I actually had "theirdomain.com" in both otions, but changed the > second option to "$mydomain" and that didn't make any difference > either. > I presume you did reload or restart postfix > > > -- > Kind Regards > Rudi Ahlers > SoftDux > > Website: http://www.SoftDux.com > Technical Blog: http://Blog.SoftDux.com > Office: 087 805 9573 > Cell: 082 554 7532 > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos > -- L. de Braal BraHa Systems NL - Terneuzen T +31 115 649333 F +31 115 649444

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Kickstart installation error
by Anshul Chauhan 18 Aug '11

18 Aug '11

Hi, I’m trying kickstart on CentOS Below is my ks.cfg *[root@localhost ~]# cat /root/ks.cfg* * * #Generated by Kickstart Configurator #platform=x86, AMD64, or Intel EM64T #System language lang en_US #Language modules to install langsupport en_US #System keyboard keyboard us #System mouse mouse #Sytem timezone timezone Asia/Dili #Root password rootpw --iscrypted $1$597tHcci$7GOVXzr92.Ce5IaqnXZA30 #Reboot after installation reboot #Use text mode install text #Install OS instead of upgrade install #Use Web installation url --url ftp://192.168.0.1/pub/ #System bootloader configuration bootloader --location=mbr #Clear the Master Boot Record zerombr yes #Partition clearing information clearpart --all --initlabel #Disk partitioning information part /boot --fstype ext3 --size 100 part swap --size 1987 part / --fstype ext3 --size 1 --grow #System authorization infomation auth --useshadow --enablemd5 #Network information network --bootproto=dhcp --device=eth0 #Firewall configuration firewall --disabled #SELinux configuration selinux --disabled #Do not configure XWindows skipx #Package install information %packages --resolvedeps @ gnome-desktop @ kde-desktop @ editors @ engineering-and-scientific @ graphical-internet @ text-internet *[root@localhost ~]# cat /etc/dhcpd.conf* ddns-update-style interim; ignore client-updates; subnet 192.168.0.0 netmask 255.255.255.0 { # --- default gateway option routers 192.168.0.1; option subnet-mask 255.255.255.0; # option nis-domain "domain.org"; # option domain-name "domain.org"; # option domain-name-servers 192.168.1.1; # # option time-offset -18000; # Eastern Standard Time # option ntp-servers 192.168.1.1; # option netbios-name-servers 192.168.1.1; # --- Selects point-to-point node (default is hybrid). Don't change this unless # -- you understand Netbios very well # option netbios-node-type 2; range dynamic-bootp 192.168.0.128 192.168.0.254; default-lease-time 21600; max-lease-time 43200; #filename "/var/ftp/pub/"; #next-server 192.168.0.1; allow booting; allow bootp; class "pxeclients" { match if substring(option vendor-class-identifier, 0, 9) = "PXEClient"; next-server 192.168.0.1; filename "linux-install/pxelinux.0"; } *FTP server showing ks file accessable by ananomous users via browser* * * * * Can’t find what I’m doing wrong Kickstart installation stops with error *Kickstart error * * * *Error opening kickstart file (null) bad address * *Tried same with NFS also but their also getting the same error.* Please suggest.... Warm Regards, Anshul Chauhan "Never expect things to happen struggle & make them happen Never expect yourself to be given a good value Create a value for your own.."

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