- luv-main - example.com

Internode + Nodephone + Asterisk (+FreePBX?)
by Michael Schams 18 Oct '16

18 Oct '16

Hi there, We are planning to switch from a standard phone line to Nodephone VoIP from Internode. I am very keen to test if Asterisk (maybe in combination with FreePBX) is an option for a small team (one trunk, 6 to 8 endpoints, all with various SIP clients). I successfully set up Asterisk 13 and pjsip and FreePBX 13 on a pretty standard Debian 8 box. I suspect the challenges start when it comes to the VoIP SIP details for the trunk. I came across a few forum posts and discussions about the Internode settings, but I wonder if anyone from the LUV community runs such a setup or has some experience with Asterisk and Internode (especially their Nodephone product)? As I pointed out above, we don't have the line yet, so it's more curiosity than a specific problem I want to solve (yet) :-) Any feedback is welcome. Cheers Michael

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Re: How to make systemd more reliable
by Russell Coker 12 Oct '16

12 Oct '16

On Tuesday, 11 October 2016 10:30:01 PM AEDT Craig Sanders via luv-main wrote: > I was rebooting anyway in order to replace a failed SSD on one machine and > convert both of them to root on ZFS. It booted up OK on both, so I made it > the default. If it refrains from sucking badly enough to really piss me off > for a decent length of time, i'll leave it as the default. That's a bold move. While ZFS has been totally reliable in preserving data I have had ongoing problems with filesystems not mounting when they should. I don't trust ZFS to be reliable as a root filesystem, I want my ZFS systems to allow me to login and run "zfs mount -a" if necessary. > (this is, of courtse, one of the reasons I dislike journald. logs should be > plain text, so you can access them without specialised tools. and rsyslogd > wasn't running in the semi-broken recovery mode that systemd dumped me in > after making me wait 1m30s until it finished doing mysterious things > (AFAICT, it was doing nothing except twiddling some stars on screen). I agree that those things need to be improved. There should be a way to get to a root login while the 90 second wait is happening. There should be an easy and obvious way to display those binary logs from the system when it's not running systemd or from another system (IE logs copied from another system). -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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How to make systemd more reliable
by Tim Connors 11 Oct '16

11 Oct '16

Stop using it! And that part is easy, just run NOTIFY_SOCKET=/run/systemd/notify systemd-notify "" in a while 1 loop as an ordinary user. https://www.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet (sorry for the flamebait first line - I know this list is full of systemd fanbois) -- Tim Connors

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Re; System losing network connection(s) after a few hours
by Duncan Roe 06 Oct '16

06 Oct '16

Hi, Did someone mention this syndrome at the last LUV meeting or maybe the one before? Or perhaps it was in a post to the list? Anyway, I had a problem like that on Experts Exchange and eventually the guy solved it himself - there was another system on the network with the same IP address. Hope this helps someone, Cheers ... Duncan. -- Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html

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Drupal and daylight savings
by Russell Coker 03 Oct '16

03 Oct '16

We have Drupal running the LUV web site which exports events as iCAL which can be imported into Google Calendar for Android phones. But somewhere along the way it gets messed up with daylight savings, so currently my phone is telling me that the next LUV meeting starts at 7:30 when it's really 6:30. Is there anyone who would like to investigate this? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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spam and web security
by Russell Coker 02 Oct '16

02 Oct '16

https://etbe.coker.com.au/2016/10/02/hostile-web-sites/ In a discussion on luv-talk Mark asked about the risks involved with accessing hostile web sites with wget. I wrote the above blog post which hopefully answers most questions in this regard. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Orbital simulation
by Russell Coker 26 Sep '16

26 Sep '16

Is there a good free orbital simulator for Linux? I don't want a game like KSP but a simulation of orbits without much need for fancy graphics. I am wondering what the orbit of a ring would be like (EG a Dyson ring) and whether it's plausible to make such a ring or whether a set of disconnected sattelites in the same orbit is required. -- Sent from my Nexus 6P with K-9 Mail.

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another outage
by Russell Coker 24 Sep '16

24 Sep '16

The virtual machine running the LUV server was killed by the kernel OOM 4 hours ago. I didn't immediately notice because the VM running my Jabber server (which notifies me of system problems) was also killed). When we had the last problem I converted the virtual machines from Xen to KVM. With KVM the VMs are regular Linux processes and they share the same memory as regular processes. So if another process allocates too much RAM then it may cause KVM memory allocation to fail. Also if the entire system runs out of RAM the kernel may stupidly decide to kill the KVM instance instead of something else. I think that part of the problem was that BOINC was configured to use up to 90% of system RAM. That was an OK setting for a Xen server where the Dom0 had nothing of note running other than BOINC and the virtual machines had RAM reserved. When running KVM this wasn't a suitable setting. I've configured BOINC to only use 40% of RAM and increased swap size. This shouldn't happen again. Also I'm going to move the Jabber server to the Dom0 so that if the DomUs die then I can still get alerts. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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ZFS error logging
by Russell Coker 23 Sep '16

23 Sep '16

Below is part of the output of "zpool status". It seems that sdr is defective, it has a steadily increasing number of checksum errors. Would the "resilvered 763M" part be about the 121 checksum errors? If so does that mean each checksum error required resilvering on average 6M of data? The kernel message log has NOTHING about this. I'm used to Ext* and BTRFS which give kernel message log entries about filesystem errors. Can ZFS be configured to give similar logging? As an aside I've written a mon module for monitoring for such ZFS errors. I'll release it sometime soon. But I'd be happy to give a version that's quite usable although not ready for full release to anyone who wants it. status: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected. action: Determine if the device needs to be replaced, and clear the errors using 'zpool clear' or replace the device with 'zpool replace'. see: http://zfsonlinux.org/msg/ZFS-8000-9P scan: resilvered 763M in 0h0m with 0 errors on Thu Aug 18 14:48:53 2016 config: NAME STATE READ WRITE CKSUM server ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 sdj ONLINE 0 0 0 sdk ONLINE 0 0 0 sdl ONLINE 0 0 0 sdm ONLINE 0 0 0 sdn ONLINE 0 0 0 sdo ONLINE 0 0 0 sdp ONLINE 0 0 0 sdq ONLINE 0 0 0 sdr ONLINE 0 0 121 -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Postfix + Dovecot (+MySQL)
by Piers Rowan 21 Sep '16

21 Sep '16

Hi there, I set up a VM a couple of weeks back as a mail server. I can send email via web mail and I can get email in but I can't get it to relay. cat /etc/postfix/main.cf | grep restrictions # overcome chroot restrictions. The alternative, having a copy of # through Postfix. See the smtpd_recipient_restrictions parameter # relay mail to. See the smtpd_recipient_restrictions description in smtpd_relay_restrictions = permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination mua_client_restrictions = permit_sasl_authenticated,reject mua_helo_restrictions = permit_sasl_authenticated,reject mua_sender_restrictions = permit_sasl_authenticated,reject smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,check_policy_service unix:/var/spool/postfix/postgrey/socket smtpd_recipient_restrictions = reject_invalid_hostname, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, reject_unauth_destination, permit_sasl_authenticated, check_policy_service unix:/var/spool/postfix/postgrey/socket, reject_rbl_client zen.spamhaus.org, reject_rbl_client bl.spamcop.net, reject_rbl_client dnsbl.sorbs.net, reject_rbl_client cbl.abuseat.org, reject_rbl_client b.barracudacentral.org, reject_rbl_client dnsbl-1.uceprotect.net,permit cat /etc/postfix/master.cf | grep restrictions -o smtpd_client_restrictions=$mua_client_restrictions -o smtpd_helo_restrictions=$mua_helo_restrictions -o smtpd_sender_restrictions=$mua_sender_restrictions -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject # -o smtpd_client_restrictions=$mua_client_restrictions # -o smtpd_helo_restrictions=$mua_helo_restrictions # -o smtpd_sender_restrictions=$mua_sender_restrictions # -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject -o smtpd_client_restrictions= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject Any ideas? I'm not familiar with Postfix. Thanks Piers

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