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34758 discussions

how to build/install pulseaudio 6.0 on centos 6.8
by qw 05 Jul '16

05 Jul '16

Hi, Centos 6.8 comes with pulseaudio 0.9, but I want to use pulseaudio 6.0 or higher version, which is used on centso 7. How to build/install new pulseaudio on centso 6.8? Are there some dependency libs for pulseaudio? is there some rpm of pulseaudio 6.0 for centos 6.8? Thanks Regards andrew

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how to use python 2.7 by default instead python 2.6 on centos 6.8
by qw 04 Jul '16

04 Jul '16

Hi, centos 6.8 comes with python 2.6. But I want to use python 2.7 to build gstreamer sdk. I have built python 2.7 and installed it into my custom directory. How to set centos to use python 2.7 by default instead of python 2.6? Thanks! Regards Andrew

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netbook screen suddenly goes black
by Fred Smith 02 Jul '16

02 Jul '16

Hi all! I'm running an up to date Centos-7 on my Acer Aspire One netbook. have been for, well, ever since C7 was released. Just had an event today that also happened 2 or 3 times with earlier systems installed, but I never pursued it. What happens is that suddenly while working away on the desktop the display suddenly goes black... not black as in turned off, I can see that the backlight is still on, but no image is displayed. Nothing I can do fixes it except a reboot. I've tried CTRL-ALT-BKSP, CTRL-ALT-DEL, alt+printscreen+r+e+i+s+u+b. none of them do anything noticeable. I've been looking at system logs and don't find anything that gives me a clue what is going wrong when that happens. neither dmesg, /var/log/Xorg*, nor /var/log/messages contins much. I've tried digging thru "man journalctl" and ultimately reading thru the output of journalctl with no arguments. Can anyone of you provide further hints on what I should be looking for or at? thanks! Fred -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. ------------------------------- Romans 5:8 (niv) ------------------------------

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Securing RPC
by Leon Vergottini 01 Jul '16

01 Jul '16

Dear Community I hope you are all doing well. Recently I have been receiving several complaints from our service provider. Please see the complaint below: A public-facing device on your network, running on IP address XXX.XXX.XXX.XXX, operates a RPC port mapping service responding on UDP port 111 and participated in a large-scale attack against a customer of ours, generating responses to spoofed requests that claimed to be from the attack target. Please consider reconfiguring this server in one or more of these ways: 1. Adding a firewall rule to block all access to this host's UDP port 111 at your network edge (it would continue to be available on TCP port 111 in this case). 2. Adding firewall rules to allow connections to this service (on UDP port 111) from authorized endpoints but block connections from all other hosts. 3. Disabling the port mapping service entirely (if it is not needed). Unfortunately, I cannot disable NFS which lies at the root of this problem. In addition, I am struggling to find a proper tutorial of moving NFS from udp over to tcp. May I kindly ask you to point me in a direction or provide me with ideas on how to nail this thing in the .... Kind Regards Leon

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how to update glib-2.28.8 to glib-2.40.0 or newer version
by qw 01 Jul '16

01 Jul '16

Hi, I'm trying to build gstreamer sdk on centos 6.7. When configure is run for 'gstreamer-1.8.2.tar.xz' on centos 6.7, error messages are reported as below: checking for GLIB... no configure: Requested 'glib-2.0 >= 2.40.0' but version of GLib is 2.28.8 configure: error: This package requires GLib >= 2.40.0 to compile. The command of 'yum install glib*' can only update glib to glib-2.28.8. How to update glib to the version of >=2.40.0 on centos 6.7? Thanks! Regards Andrew

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[CENTOS ]IPTABLES - How Secure & Best Practice
by Leon Vergottini 01 Jul '16

01 Jul '16

Dear Members I hope you are all doing well. I am busy teaching myself iptables and was wondering if I may get some advise. The scenario is the following: 1. Default policy is to block all traffic 2. Allow web traffic and SSH 3. Allow other applications I have come up with the following: #!/bin/bash # RESET CURRENT RULE BASE iptables -F service iptables save # DEFAULT FIREWALL POLICY iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP # ------------------------------------------------------ # INPUT CHAIN RULES # ------------------------------------------------------ # MOST COMMON ATTACKS iptables -A INPUT -p tcp --tcp-flags ALL NONE -j DROP iptables -A INPUT -p tcp ! --syn -m state --state NEW -j DROP iptables -A INPUT -p tcp --tcp-flags ALL ALL -j DROP # LOOPBACK, ESTABLISHED & RELATED CONNECTIONS iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # SSH iptables -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT # WEB SERVICES iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 8080 -j ACCEPT # EMAIL iptables -A INPUT -p tcp -m tcp --dport 143 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 993 -j ACCEPT # OTHER APPLICATIONS iptables -A INPUT -p tcp -m tcp --dport XXXXX -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport XXXXX -j ACCEPT # ------------------------------------------------------ # OUTPUT CHAIN RULES # ------------------------------------------------------ # UDP iptables -A OUTPUT -p udp -j DROP # LOOPBACK, ESTABLISHED & RELATED CONNECTIONS iptables -A OUTPUT -i lo -j ACCEPT iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # SSH iptables -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT # WEB SERVICES iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 8080 -j ACCEPT # EMAIL iptables -A INPUT -p tcp -m tcp --dport 143 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 993 -j ACCEPT # OTHER APPLICATIONS iptables -A INPUT -p tcp -m tcp --dport 11009 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 12009 -j ACCEPT # ------------------------------------------------------ # SAVE & APPLY # ------------------------------------------------------ service iptables save service iptables restart To note: 1. The drop commands at the beginning of each chain is for increase performance. It is my understanding that file gets read from top to bottom and applied accordingly. Therefore, applying them in the beginning will increase the performance by not reading through all the rules only to apply the default policy. 2. I know the above point will not really affect the performance, so it is more of getting into a habit of structuring the rules according to best practice, or at least establishing a pattern for myself. How secure is this setup? Is there any mistakes or things that I need to look out for? Thank you in advance for your feedback. Kind Regards Leon

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CentOS-announce Digest, Vol 137, Issue 1
by centos-announce-request＠centos.org 01 Jul '16

01 Jul '16

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CEEA-2016:1375 CentOS 7 qla2xxx Enhancement Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Thu, 30 Jun 2016 17:45:38 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CEEA-2016:1375 CentOS 7 qla2xxx Enhancement Update Message-ID: <20160630174538.GA46122(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Enhancement Advisory 2016:1375 Upstream details at : https://rhn.redhat.com/errata/RHEA-2016-1375.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: 08a6bc752e27c15e9416e7e517f3d8196230222a0b48500feabb503a51526233 kmod-qla2xxx-8.07.00.33.07.3_k-1.el7_2.x86_64.rpm Source: 8c3640fe32a123a6f1630d3f3be4007be5c3a3bcbac94a6ea37c5ff21b921456 qla2xxx-8.07.00.33.07.3_k-1.el7_2.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org https://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 137, Issue 1 ***********************************************

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Does centos 6.8 support gstreamer 1.8?
by qw 30 Jun '16

30 Jun '16

Hi, I found gstreamer offcial have just announced 1.8.2 version. ("gstreamer.freedesktop.org") But centos 6 only support gstreamer 0.10. When will centos 6 support gstreamer 1.8? Thanks! Regards Andrew

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CentOS-7 Screen black after boot
by Venkata Balaji N 30 Jun '16

30 Jun '16

Hello Community, This is my first ever email to CentOS community. Firstly, CentOS is a great open-source operating system. I have been using it for years and recommending the same for production use to our customers. I have installed CentOS-7 operating system couple of days ago and everything was working fine. Yesterday, the screen got struck and the whole system was unresponsive, after a long wait, i have restarted the system. Since, then, i can only see the black screen and GUI is not coming up. I can remotely login to the system from Putty and can operate without any issues, the only issue is that GUI is not coming up. I have installed CentOS-7 server-GUI. Any help would be appreciated here. Regards, Venkata B N

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VNC server issue- Gnome - oh no! Something has gone wrong
by Hersh 29 Jun '16

29 Jun '16

Hi, I have been using VNC on CentOS 7 server from last couple of months and it was running all fine till last night. Unfortunately, there was an abrupt power failure and system got restarted. Now, when I try to login with VNCviwer, it thrown an error message- "*Gnome - oh no! Something has gone wrong "* with a logout option. When I click on logout, I see black/dark gray screen with 3 check boxes. I googled to figure out a solution and tried several solutions but could not fix the problem. Any suggestion would be very helpful. Regards Hersh

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