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Re: [CentOS] mailing list mail from @yahoo addresses
by Richard 09 Nov '16

09 Nov '16

> Date: Wednesday, November 09, 2016 21:25:50 +0100 > From: Antonio Trande <anto.trande(a)gmail.com> > > On 11/09/2016 09:21 PM, Phil Wyett wrote: >> On Wed, 2016-11-09 at 12:16 -0800, Bart Schaefer wrote: >>> For what it's worth, I just received the auto-notification of >>> having been kicked off the list for excessive bounces. So gmail >>> is honoring Yahoo's DMARC. >> >> Hi, >> >> Your not the only one. I got it a few hours ago. >> >> Regards >> >> Phil >> >> > > Me too. > Must we do something about? In one of the Yahoo articles I referred to earlier they indicate that Hotmail and Gmail (in addition to themselves) enforce DMARC. My mail provider (Rackspace) does now too so I get dropped off various lists (including this one the other day) every few days. The issue is in how the mailing list sends out messages. If they are addressed as if they come from an @yahoo address (e.g,. the original poster), but not from an authorized yahoo mail server, any mail server enforcing (in this case yahoo's) DMARC will reject the message. After enough bounces the mailing list will drop you (with or without notice). Short of getting your mailing list mail via a provider that doesn't enforce DMARC this week, there's nothing an end-user can really do. >From some lists that I'm on that are handling this, it appears that mailman 2.1.18 can (or can be made to) deal with the addressing so that things pass the DMARC test. This list appears to use 2.1.12.

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Lost Wifi device after update/reboot
by Johannes Haas 09 Nov '16

09 Nov '16

After updating and rebooting my laptop, I seem to have lost my wifi device. Since it still is physically intact (everything works when I boot a live system from USB) I have the suspicion that something went wrong on the CentOS side. Also, ,my password prompt after booting (system is encrypted) now appears to see an US keyboard layout, instead of the German layout it should have, so it seems like there is indeed something wrong/changed with my system. Apparently there used to be some issues with older versions where the system simply forgot the "NetworkManager-wifi " package, but according to "rpm -q" I still have that. "rfkill list" does not list my wifi card, whereas "lspci | grep Network" seems OK: "04:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)" So, is it "simply" an issue with with CentOS, or did I do something wrong without realizing it?

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samba CTDB inability to create smb.conf cache
by lejeczek 09 Nov '16

09 Nov '16

hi everyone any experience with ctdb? I'm setting up a simple cluster, only ldap backend instead of tdb2. One (of the two) server fails this way: 50.samba: ERROR: smb.conf cache create failed $ ctdb status Number of nodes:2 pnn:0 10.5.6.32 OK pnn:1 10.5.6.49 UNHEALTHY (THIS NODE) Generation:323266562 Size:2 hash:0 lmaster:0 hash:1 lmaster:1 Recovery mode:NORMAL (0) Recovery master:0 If I copy the file manually while ctdb is running I see: 50.samba: WARNING: smb.conf cache update failed - using old cache file Node became HEALTHY. Ask recovery master 0 to perform ip reallocation and: $ ctdb status Number of nodes:2 pnn:0 10.5.6.32 OK pnn:1 10.5.6.49 OK (THIS NODE) but only so far as next stop/restart. What the heck? Why is that one box unable to create that cache file? Would you care to make some sense out of it for me please? thx L.

1 0

How to start a script to complete configuration
by Bernard Fay 09 Nov '16

09 Nov '16

Hi, We have a virtual environment based on XenServer. In this environment I defined a template for CentOS 7 servers. I would like to start a script a boot time to complete the configuration of new VMs based on this template. How can I have a script started before any login prompt to ask question to the user to complete the configuration such as hostname, IP address, etc? Thanks, Bernard

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Re: [CentOS] CentOS 6.3 packages updates options without upgrading.
by Dipal Bhatt 08 Nov '16

08 Nov '16

Hi, Thanks for your responses. Unfortunately, there's not possibility in this specific situation to be able to update from 6.3 -> 6.8. But, it would be nice to be able to update specific packages to latest that's available in 6.8 repo at http://mirror.centos.org/centos/6/os/x86_64/Packages/ For example, nss-util-3.21.0-2.el6.i686.rpm <http://mirror.centos.org/centos/6/os/x86_64/Packages/nss-util-3.21.0-2.el6.…> 2016-05-12 10:48 67K nss-util-3.21.0-2.el6.x86_64.rpm <http://mirror.centos.org/centos/6/os/x86_64/Packages/nss-util-3.21.0-2.el6.…> 2016-05-12 10:47 67K nss-util-devel-3.21.0-2.el6.i686.rpm <http://mirror.centos.org/centos/6/os/x86_64/Packages/nss-util-devel-3.21.0-…> 2016-05-12 10:48 69K nss-util-devel-3.21.0-2.el6.x86_64.rpm <http://mirror.centos.org/centos/6/os/x86_64/Packages/nss-util-devel-3.21.0-…> 2016-05-12 10:48 69K Simply updating these packages on 6.3, would there be any issues w/o updating rest of the packages from 6.3 to 6.8? As I mentioned, 'yum update' or updating to latest 6.8 packages from 6.3 is not currently plausible or even feasible for some reason. Or, please suggest any other options to be able to update such packages w/o updating rest of the userland on 6.3? Thank again very much.

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CentOS 6.3 packages updates options without upgrading.
by Dipal Bhatt 08 Nov '16

08 Nov '16

Hi, IT seems, centos6.3 does no longer get any updates esp security fixes as per readme here: http://mirror.centos.org/centos/6.3/readme Is there updated source RPMs that can be rebuilt and hand patched, for example, nss-util 3.21.0-2 or openssl 1.0.1e that can be safely used on CentOS 6.3? Any other options that you can shed some light on, highly appreciated for above examples. My apologies if this is not the right group to post such questions or if any existing literature available for same, please kindly refer to right place. The other option is to use CentOS 6.8 updated package on 6.3, but I am not sure of any upstream and downstream dependencies in 6.3 without updating the rest of the userland from 6.3 to 6.8. Nonetheless, would this option be feasible? Appreciated very much, Thank you.

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Proxy server settings
by paul.greene.va 07 Nov '16

07 Nov '16

Hello All, I'm sure this must be a fairly quick and easy configuration, but I have not been able to figure it out yet. How do you configure the proxy settings in the OS itself (not in a browser or other application) so that anytime the server tries to get out to the internet, that it can direct its traffic to go through a proxy server? I tried putting the proxy settings in .bash_profile per a tech article I found online but that did not work. The OS is Redhat 7.2. Thanks, Paul Greene

2 2

FireFox and Plugins
by Alice Wonder 06 Nov '16

06 Nov '16

While doing a browser fingerprinting survey, I was quite surprised to see I actually have a FireFox plugin installed. The culprit is /usr/lib64/mozilla/plugins/librhythmbox-itms-detection-plugin.so It appears that whoever maintains the rhythmbox RPM has chosen not to package the browser plugin separately like it probably should be. So if I have the rhythmbox RPM installed, I have the plugin. This is rather worrisome because I can find no trace of the plugin in the Mozilla preferences panel, so if it is there it is very well hidden and if it really isn't there, it can't be disabled there. Is there some kind of blacklist file I can put in /usr/lib64/mozilla/plugins/ or ~/.mozilla/plugins/ to specifically tell FireFox not to load that plugin, or do I have to uninstall rhythmbox? Thank you for suggestions. PS does anyone actually have a real world use for an itms detection plugin?

8 17

RHEL 7.3 released
by James Hogarth 06 Nov '16

06 Nov '16

As a heads up RHEL 7.3 is released: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/ht… Pay careful attention when the CR repo starts churning out RPMs (if you have CR enabled) as there have been a few rebases in this - notably firewalld, NetworkManager, freeIPA, libreoffice, samba, amongst others If you have an ipv6 environment ping is now ipv6 aware and ping6 is removed (with a symlink to ping for compatibility). On the SSL side of things pycurl now handles TLS 1.1 and 1.2 and openJDK8 can handle ECC. With the NetworkManager rebase more complicated arbitrary layering of interfaces is possible (eg physical -> team -> vlan -> bridge), which I'll be revisiting my old NM article to investigate soon, and Wi-Fi scanning will use a randomised MAC ... this may affect some people. For a known BSSID the connect won't be a randomised MAC though just when scanning. The firewalld zones become a bit more usable with ipsets being usable to define the zone making management of which networks go in which zones a bit nicer - I'll be revisiting my old firewalld article to investigate this too. The deprecation of the old net-tools suite continues with bridge-utils no longer required in many circumstances as iproute2 gets improved bridge capabilties... this brings EL7 inline with the Fedora behaviour: https://fedoramagazine.org/build-network-bridge-fedora/ On the network side of things be aware of a potentially breaking change to systems in how device names are created, this will only affect systems that have exceptionally long device names: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/ht… For fresh installs using automatic partitioning the default /boot size has been bumped to 1G ... for kickstarts and other automated installs you may want to tweak your setups to match. The NSS bug that caused problems with reusing SSL sessions and was breaking owncloud setups has been resolved - I have not tested this yet and will be doing so this weekend. The impending owncloud 9.1.1 EL7 release in EPEL7 will be removing my workaround and require this for full correct functionality. In the tech preview world nftables joins the testing group (I'll have articles up exploring this new firewalling method in the coming weeks) for networking. Whilst with storage overlayfs and btrfs remain in tech preview status - with cephfs joining them... as notable pieces. There's also new pNFS stuff. This is only a small snippet of things that jumped out relevant to me personally. As always make sure you read through the release notes in full. to be ready once CentOS starts producing the RPMs, and keep in mind this early in the lifecycle there are a fair few rebases and new features implemented that should be tested... unlike later on in the lifecycles (eg EL6) where no/minimal rebasing happens and changes at a feature level don't happen.

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anaconda pgp rpm verification
by Leon Fauster 04 Nov '16

04 Nov '16

Does anaconda verifies gpg signatures to ensure the integrity of the packages? Are the keys already imported or how does anaconda do this job? Any suggestions to improve the integrity while kickstarting a system? Do you use repo_gpgcheck? -- Thanks, LF

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