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34758 discussions

Vsftpd vs. iptables firewall script
by Nicolas Kovacs 25 May '18

25 May '18

Hi, I'm currently setting up a local FTP server, to receive disk images sent with G4L (Ghost4Linux). This server has been running Slackware Linux before, and the Vsftpd setup was relatively simple. With CentOS things seem to be slightly different, so I'm currently trying to work things out. For the moment, two things seem to be creating problems, the simple iptables firewall and SELinux. When I disable the firewall and SELinux, Vsftp works as expected. So far so good. Now let's tackle this one dragon at a time. First the firewall. I'm starting with a very simple firewall script that looks somewhat like this. I'm linking to the template, I won't copy/paste the whole thing here. https://github.com/kikinovak/centos-7-server-lan/blob/master/config/firewal… Under Slackware, the iptables rule for a local FTP server looked like this: modprobe ip_conntrack iptables -A INPUT -p tcp -i $IFACE_LAN --dport 21 -j ACCEPT I tried this, but to no avail. Can't connect to my server. I googled a bit, and I found out that there seem to be quite many different answers about the subject of "how do I configure my firewall for Vsftpd". Any suggestions ? Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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Update announcement request
by Albert McCann 25 May '18

25 May '18

Hi, Can the updated files added to the Centosplus repo be sent to the announcement list please? I can't find them announced in any of the other lists. Related to that, a new kernel was released to the Centosplus repo, kernel-plus-3.10.0-862.2.3.el7.centos.plus, but perf and python-perf were not updated for the new kernel. Is this an oversight? perf doesn't complain about mismatched versions though. Thanks! Al McCann Wear a Kilt, but carry a big Bagpipe.

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New mail server slow connecting to web server
by Gary Stainburn 25 May '18

25 May '18

Having successfully killed my (Centos 7) mail server I have had to build a new one. Thankfully I had a server build that I was about to start configuring as my new web server. I appear to have set everything up okay, Exim, SpamAssassin, ClamAv, Dovecot, Postgresql, httpd etc. Everything appears fine apart from when I try to connect to my web server. Whatever tried to connect suffers from a delay, and either times out or works eventually. I started off with problems connecting Exim to Postgresql on the web server. I then found that I couldn't connect using psql, or using Perl DBD-Pg. I then found I couldn't SSH or SCP, dispite them both being on the same subnet. The more I use the new system, better it appears to be, but the delay is still there. name resolution isn't the problem as I can nslookup both ways without problems, and specifying IP addresses makes no difference. For testing I have disabled the firewall and selinux and that made no difference. If I try to connect the other way there is no delay, but I cannot access the Postgresql server on my new mail server from the web server. Anyone got any ideas?

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How to build nss-util.i686 on Centos 7 with mock
by Martin Vogt 25 May '18

25 May '18

Hello list, I'm currently trying to build the i686 version of http://vault.centos.org/7.5.1804/os/Source/SPackages/nss-util-3.34.0-2.el7.… The x86_86 version works with mock, but I cannot figure out how to build the i686 version. best regards, Martin

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CentOS 7 system unsable after "yum update" (with some errors on the way)
by Toralf Lund 25 May '18

25 May '18

God dag, I've been trying to run a "yum update" (without additional arguments) to install the latest system updates on my CentOS 7 machine. It's no going so well. What happens is this: 1. The process gets stuck a couple of places as a "post" script or similar tries to run "dbus-send"; the problem looks awfully similar to what's described in https://bugzilla.redhat.com/show_bug.cgi?id=1186018. More specifically, this happens on installation of package "setroubleshoot" and "avahi". As a workaround, I'm using a manual kill to get rid of the hung process. 2. There is a similar hang related to "systemctl try-restart". This happens on "wpa_supplicant" clean-up. 3. When I restart the system after the installation is done (with work-arounds), it won't boot properly - I don't get a login screen or console login prompt. I notice two error messages on the boot console: Failed to start login service Failed to start WPA supplicant daemon I've tried the operation twice with the same result. First time was just after the release of CentOS 7.5, I believe. I've done similar upgrades before that, too, and they've completed without problems. Has anyone else seen this? Any ideas what I can do to make the system usable again, besides restoring from back-up (as I'm doing now)? There is info on the net that suggests that the problem is related to SELinux and that a relabel operation and/or policy change would help, but I tried all sorts of things related to that the first time around, and nothing seemed to help. (I was working partly in rescue mode booted from an installer USB and partly in single user mode, which does work.) TIA - Toralf

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Steps to create efiboot.img file
by Maheshwari, Shagun 25 May '18

25 May '18

Hi, Please tell me the steps to create efiboot.img. Thank you!! Shagun

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using Skype on C-7
by Fred Smith 25 May '18

25 May '18

Hi I've whined about this before, but now I feel the overwhelming urge to whine some more. Forgiveness begged... :) I've spent some very frustrating times trying to get a microphone to work when doing skype calls. According to the various sound tools available on Centos all the various mics I have (built into webcam, analog headset, USB headset)produce sound just fine. but when using skype there are too many different knobs one can turn to actually make it work. There's PulseAudio, Alsamixer, and for me, since I use the Mate desktop, the Mate Volume Control, which can also be accessed by a right-click on the speaker icon in the top panel. then in skype I get a list of 5 (FIVE!) different audio input devices. I just spent a frustrating time trying to join in a daily scrum at my office (I'm out of the office today) wherein I could not get outgoing audio to work. afterwards I tried more things and managed to get ONE of the 3 to work, the one built into the webcam. to do that I had to make the following settings: choose Input tab in the Mate Volume Control, then move the volume slider most of the way over to the right. In Alsa Mixer, set front mic to 70 and front mic boost to 100. In Pavucontrol, enable webcam audio input, and crank it way up. in Skype, choose "default device", as distinct from "Default Device", or the other three choices. There's gotta be a better way, I'm open to suggestions from anyone else who has figured out how to configure the system to work with Skype, without having to configure FOUR different applications before it will work. thanks (a lot!) in advance! -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- The eyes of the Lord are everywhere, keeping watch on the wicked and the good. ----------------------------- Proverbs 15:3 (niv) -----------------------------

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CentOS 6 libvirt update?
by Matthew Phelps 24 May '18

24 May '18

I hate to pester, but I have several VM hosts to reboot. Is this update on its way for CO6? https://access.redhat.com/errata/RHSA-2018:1669 The CO7 libvirt update went out, and the qemu CO6 updates as well. Any reason the CO6 libvirt update is not out yet? Thanks, -- Matt Phelps System Administrator, Computation Facility Harvard - Smithsonian Center for Astrophysics mphelps(a)cfa.harvard.edu, http://www.cfa.harvard.edu

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CentOS-announce Digest, Vol 159, Issue 6
by centos-announce-request＠centos.org 24 May '18

24 May '18

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. [Infra] - planned outage : {bugs, fr, status}.centos.org (Fabian Arrotin) ---------------------------------------------------------------------- Message: 1 Date: Thu, 24 May 2018 13:05:09 +0200 From: Fabian Arrotin <arrfab(a)centos.org> To: "The CentOS developers mailing list." <centos-devel(a)centos.org>, centos-announce(a)centos.org Subject: [CentOS-announce] [Infra] - planned outage : {bugs, fr, status}.centos.org Message-ID: <2747bbbb-5c09-9ff9-813c-06f62599390d(a)centos.org> Content-Type: text/plain; charset="utf-8" Due to a hardware replacement, we'll have to power down the hypervisor hosting several VMs, including the ones used for the following impacted services : * https://bugs.centops.org * https://status.centos.org * https://fr.centos.org Hardware maintenance is scheduled for """"Thursay May 24th, 12:00 pm UTC time"""". You can convert to local time with $(date -d '2018-05-24 12:00 UTC') Root cause : a HDD in the array used to host the VMs failed, and there is no hot-swap capabilities, so full "power off" is required to replace the failed HDD and then start the rebuild operation. That means that those services (already impacted) will be slower during the rebuild operation, but at least reachable Thanks for your comprehending and patience. on behalf of the Infra team, -- Fabian Arrotin The CentOS Project | https://www.centos.org gpg key: 56BEC54E | twitter: @arrfab

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CentOS 7.5 Nautilus 100% reproducible crash.
by George Labuschagne 24 May '18

24 May '18

Good day When trying to add an 'Other Locations' in Nautilus CentOS 7.5, Nautilus always 100% of the time crash with a kernel error. Here is a short video showing the workflow: https://youtu.be/dPmTDBRqL_I This did not happen in 7.4 Both 7.4 and 7.5 runs on VirtualBox 5.2.12 - but as stated before, this did not happen in 7.4 I also did a fresh clean install of both 7.4 and 7.5, and 7.5 exhibits this behaviour irrespective if it was updated or freshly installed. Kind regards, George Disclaimer The information contained in this communication from the sender is confidential. It is intended solely for use by the recipient and others authorized to receive it. If you are not the recipient, you are hereby notified that any disclosure, copying, distribution or taking action in relation of the contents of this information is strictly prohibited and may be unlawful. This email has been scanned for viruses and malware, and automatically archived by Mimecast SA (Pty) Ltd, an innovator in Software as a Service (SaaS) for business. Mimecast Unified Email Management (UEM) offers email continuity, security, archiving and compliance with all current legislation. To find out more, visit http://www.mimecast.co.za/uem.

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