All Questions
78,241
questions with no upvoted or accepted answers
36
votes
1
answer
4k
views
Unexpected and unexplained slow (and unusual) memory performance with Xeon Skylake SMP
We've been testing a server using 2x Xeon Gold 6154 CPUs with a Supermicro X11DPH-I motherboard, and 96GB RAM, and found some very strange performance issues surrounding memory when compared to ...
- 393
17
votes
0
answers
11k
views
Restoring data after zfs destroy
On Debian 8.7 I had a zfs pool.
(obviously using ZFS on Linux, not Oracle or Solaris zfs)
It was needed to extend ZFS pool from mirror on 2 disks to raidz on 4 disks.
I did backup (one copy of data - ...
- 287
16
votes
1
answer
2k
views
Using defaultAuthenticationType with PowerShell Web Access
PowerShell web access lets you choose the authentication type. By default, it uses a value of Default, which ends up being Negotiate. I have set up CredSSP to allow logging into the PSWA server itself ...
- 2,555
14
votes
1
answer
20k
views
Parallel Redo Is Shutdown
When looking in Windows event logs, i'm seeing the following messages on an almost continuous basis -
Starting up database 'Database'.
Parallel redo is started for database 'Database' with worker ...
- 410
13
votes
4
answers
2k
views
Freebsd change default Internet channel route
I have two Internet channel and Gateway on freebsd. When I switch channel with the command route change default chan2, the command netstat -nr shows changed default route. But traceroute shows that ...
- 131
13
votes
1
answer
7k
views
Change Envelope From to match From header in Postfix
I am using Postfix as a gateway for my domain and need it to change or rewrite the Envelope From address to match the From header. For example, the From: header is "[email protected]" and the Envelope ...
- 265
12
votes
0
answers
579
views
How much does FreeBSD accept_filter actually improve performance in a modern world?
I recently learned about FreeBSD's accept_filter socket option which can allow a worker process to avoid context switching by, for example, waiting until a full HTTP request is received with accf_http:...
- 9,198
11
votes
0
answers
6k
views
How can a Cognito user initialize TOTP on first login when MFA is required?
I am setting up Amazon Cognito for authentication to use a Kibana instance. I only permit administrators to create users, and I permit only the Cognito User Pool identity provider. When creating the ...
- 186
11
votes
2
answers
2k
views
Disable file locks on a read-only Windows File Share
Case
On a Windows Server (2012R2 or 2016), I want to configure a file share offering a following functionality
some users, publishers group, have a write access to the share; these users are ...
11
votes
1
answer
4k
views
haproxy CD flags with browser, not with curl
Issuing the same url request, from the same workstation to the same haproxy server:
with a browser (tried Chrome and Firefox): haproxy log shows CD flags
with curl: haproxy log shows --
Both ...
- 437
11
votes
3
answers
1k
views
Unable to bind OSX 10.9 to Active Directory 2008
I am struggling to bind OSX 10.9 to a 2008 r2 Active Directory. I can join the domain fine when I boot into Windows from the same machine. From OSX I can find the domain controller successfully and ...
- 111
11
votes
1
answer
5k
views
certutil -ping fails with 30 seconds timeout - what to do?
The certificate store on my Win7 box is constantly hanging. Observe:
C:\>1.cmd
C:\>certutil -? | findstr /i ping
-ping -- Ping Active Directory Certificate Services Request interface
...
- 745
11
votes
2
answers
811
views
Firefox dynamic default preference configuration
My users are all on NFS home directories and with hundreds of users all using Firefox it generates a bit of traffic reading/writing to the disk cache. As a result, I'd like to move the default ...
- 3,499
10
votes
0
answers
3k
views
Docker container crashing ubuntu host
Very unexpected, but briefly if i run a docker container host becomes unresponsive, no in/out, can't ping it, only hard reboot works.
DMESG, sys and kernel logs doesn't show anything obvious
...
- 261
10
votes
2
answers
7k
views
Changing physical path on IIS through appcmd isn't activated
We have come across an issue on IIS 7.5 where we have a simple deploy system which consists of the following:
Create a zip-file of new webroot, consisting of three folders:
Api
Site
Manager
This is ...
- 878
10
votes
1
answer
2k
views
Troubleshooting Redmine (Bitnami Stack) performance
I've got a Redmine instance (Bitnami Stack) that's unusually slow. Because I'm just trying to get to the bottom of this, I have some theories which I'd like to discuss here. So, if anybody has any ...
- 201
10
votes
2
answers
10k
views
IIS aborts request thread with Win32 status 995
We have a site where we have trouble on our production server, but not on my dev machine with request beeing aborted (hence, zero response).
It fails after exactly 1:19 minutes each time, and the ...
- 878
10
votes
2
answers
12k
views
Create user in gitlab without e-mail?
I'm testing out omnibus gitlab on a local VM. After disabling anonymous signup, I tried adding a new user via the /admin/users/new page.
It requires I associate an e-mail with the new user account, ...
- 1,165
10
votes
1
answer
3k
views
Is it possible to do multiseat the systemd way with one graphic card / two heads?
I would like to setup a multi-seat configuration using Ubuntu Xenial 16.04.
After some researches, it seems the way to do now is by systemd through "loginctl" calls. (saw here for example).
Before ...
- 201
9
votes
0
answers
2k
views
connect to tightVNC in a windows container
There are plenty of resources online about using VNC with a linux container, but none that I can find for windows containers, so I thought I'd give it a crack.
I can get the tightVNC server to start (...
- 205
9
votes
1
answer
15k
views
How to export Cisco AnyConnect preferences and certificates to another PC
I have two computers (PC and MAC) connected to different organization VPNs. I want to be able to connect from MAC to the same VPNs set on PC. So I need to export VPN list and certificates, etc to my ...
- 191
9
votes
0
answers
10k
views
LDAP: creating a bind user with limited privileges
I need to bind to an OpenLDAP server to authenticate users, but I don't want this low-privileged or "delegated administrator" to be able to see more attributes than strictly necessary.
How do I ...
- 2,879
9
votes
1
answer
8k
views
cups: HTTP_STATE_WAITING Closing for error 32 (Broken pipe)
On a Debian stable I've a network printer connected and shared (Epson hp1536dnf):
socket://ip:9100
from Linux clients I've:
ipp://IP/printers/printer1
The logs of the server are:
D [01/Sep/2017:18:...
- 1,095
9
votes
0
answers
2k
views
CentOS 6 local update repository and security updates
I know that official CentOS 6 (even 7) update repositories does not provide security information. The consequence is thatyum-plugin-security plugin and yum check-update --security command does not ...
- 5,877
9
votes
0
answers
618
views
Can Asterisk's phoneprov module be used securely?
I'm using Asterisk 13.1.0 as packaged by Ubuntu Server 16.04 to run a pure-VoIP phone system. Asterisk has a module – phoneprov – that allows it to template out configuration files for ...
- 391
9
votes
4
answers
592
views
Redundant Power Supply Sloshing (If sloshing is the right word)
I have a Supermicro Redundant Power Supply with two units in it. I also have two UPS units, one for each of the Power Supplys. I was watching the LCD on the UPSs for the watt usage. The total watts ...
- 91
9
votes
1
answer
2k
views
Azure AD Connect Password Sync
Windows 2012 R2, fully updated/activated
Roles: ADDS, ADFS
Installed Azure AD Connect latest version (only software installed other than updates)
Other applicable services: Office 365 (Business ...
- 221
9
votes
2
answers
2k
views
Delegate session management on RemoteApp 2012
We've built a rather large RemoteApp environment on 2012 R2, fully patched. Everything is working fine, so now comes the time to offshore and delegate tasks to the first line team.
We would like to ...
- 18k
9
votes
2
answers
312
views
Windows 7 contains duplicate, identical builtin print forms (Letter, Legal) but only one of the 2 successfully prints
I have a Windows 7 64-bit machine with a Lexmark E360dn printer. Whenever the user attempts to print anything, the printer defaults to "Letter" size, as expected. When the user clicks PRINT, the ...
9
votes
1
answer
2k
views
Is it possible to authenticate to Sonatype Nexus via ssh keys
Is it possible to authenticate to Sonatype Nexus via ssh keys or any other method that does not require user password in maven settings.xml?
I know there are user generated tokens in Sonatype Nexus ...
- 191
9
votes
2
answers
689
views
Cisco DNS doctoring or Hairpinning?
I've the following configuration: CISCO 881, IOS 15.2(4)M6. On WAN interface is configured the 86.34.156.48/29 subnet from our ISP. Behind the router is staying 2 webserver. NAT: 86.34.156.51 <> ...
9
votes
0
answers
223
views
Setting up IPv6 ACLs on 3com 5500g to block Router Advertisment messages
Is there a way to set up IPv6 ACLs on 3com 5500g switch to block RA traffic on access ports? I couldn't find settings for setting up any IPv6 ACL. Acording to guides, there should be ipv6 specific ...
- 101
9
votes
0
answers
2k
views
Android to openswan/xl2tpd/pppd error: result_code_avp: avp is incorrect size. 8 < 10
I am trying to use a simple Android 4.4.4 VPN connection to openswan/xl2tpd/pppd combo. the IPSec SA works, but xl2tpd at one point terminates the pppd and this shows up in logs:
xl2tpd[17990]: ...
- 880
9
votes
2
answers
18k
views
Vagrant not ready for SSH error on VirtualBox and Laravel Homestead
Vagrant Version: 1.6.3
VirtualBox: 4.3.14
Ubuntu 14.04 LTS 64 Bit
I have been on this for a pretty good while now and cannot figure this out. I have my public and private keys setup and they work. I ...
- 91
9
votes
1
answer
897
views
Using ZFS head node as database server?
I'm using a dual-head ZFS-backed NAS for high availability cluster shared storage, based on Nexenta's recommended architecture as seen here:
The disks in 1 JBOD will store the database files for a ...
- 389
9
votes
0
answers
4k
views
Unix nslcd login with sAMAccountName and/or userPrincipalName from Active Directory
I'm trying to setup authentication from Active Directory in FreeBSD 10.0 using nslcd (nss-pam-ldapd-sasl package) and would like to allow both sAMAccountName and userPrincipalName as valid login ...
- 5,540
9
votes
2
answers
5k
views
Yet Another NFS Permissions Error: Linux NFS4 Access Denied ('Auth Bogus Credentials (seal broken)') from NAT'd VM
Inside the VM, host address is 10.0.2.2, local address is 10.0.2.15. (VirtualBox).
This gets translated to 127.0.0.1 on the host side. To connect:
sudo mount -vvvt nfs4 -o clientaddr=127.0.0.1 10.0.2....
- 433
9
votes
1
answer
3k
views
how to configure IIS 7 so partial content requets/range requests on mp4 static files work.
I need help on how to setup IIS 7 so it can handle partial requests/range requests for serving mp4 files so Chrome can position seek and loop video.
From what I have read IIS is supposed to support ...
- 91
9
votes
2
answers
9k
views
OpenLDAP memberOf attribute is not updated after group update
I have an OpenLDAP setup on Debian 7.1, (OpenLDAP 2.4.31), and I am trying to set up the memberof overlay. My configuration is just like I have read at lots of sites throughout the internet, however, ...
- 191
9
votes
2
answers
2k
views
1GB VPS - Apache Worker MPM - FCGID - Max concurrent connections - RAM CAP
I have spent a week or two researching and setting up my server to run Apache with the Worker MPM and FCID. I am trying to optimize it to allow for the most concurrent connections possible. It has ...
- 89
9
votes
2
answers
3k
views
Dynamic ARP Entries turning into Static ARP entries
I recently acquired a client that has a strange ARP caching issue on one of thier servers.
I have a server that will eventually start turning it's dynamic ARP entries into static ARP entries. This ...
- 126
9
votes
1
answer
9k
views
Apache/wsgi "Script timed out before returning headers"
I have a custom Django app that's becoming unresponsive roughly every 5,000 requests. In the apache logs, I see see the following:
Apr 13 11:45:07 www3 apache2[27590]: **successful view render here**
...
- 543
9
votes
2
answers
298
views
Prompt for user group when logging into OSX domain
When a user is a member of more than one group, when logging in to a 10.6 machine, it shows a prompt asking for what group to apply settings for.
We're using the groups to mount different shares, e.g....
- 353
9
votes
3
answers
843
views
ip6tables rules are completely ignored inside OpenVZ container
We have set up IPv6 networking on openvz using bridged veth devices.
The IPv6 traffic to and from the VEs works fine.
ip6tables works on the HN and iptables work on the VE.
Inside the VE we can set ...
- 421
8
votes
1
answer
332
views
Can Samhain monitor for a file that does not exist, but might in future?
I would like Samhain to monitor a file, say for example, /root/somefile. This file does not currently exist, but I would like to be notified if it gets created at any point.
I add this to samhainrc:
...
- 471
8
votes
2
answers
925
views
what is the IOPS behavior when partitions of single disk are used in an LVM?
I have an ubuntu 14.04.1 LTS server which have LVM(backed by hardware RAID5) with logical volume and a volume group named "dbstore-lv" and "dbstore-vg" which have sdb1 sdb2 sdb3 created from same sdb ...
- 608
8
votes
0
answers
4k
views
ZFS cannot import : I/O error
I experienced an error in my ZFS machine. This may have happend after I lost power to my server, but I can not tell for sure. My ZFS Pool Gewuerzglas with RAIDZ-1 is no longer willing to import. I ...
- 81
8
votes
0
answers
3k
views
DHCP interface never transitions to configured state in systemd
I have a server running CoreOS, and my main network interface that gets configured via DHCP gains a carrier and is routable, but never leaves the configuring state. This causes systemd-networkd-wait-...
- 205
8
votes
1
answer
1k
views
Utilizing SSL on Multi-domain, Autoscaling Elastic Beanstalk Setup
We are creating a Content Management System for our company. It is important that this CMS support dynamic domain names on a dynamic number of servers. After many hours of research we felt that Amazon'...
- 211
8
votes
2
answers
1k
views
Replacing windows extra large cursor file with one that is 30% larger (Server 2008 R2)
Currently have a client that has poor eyesight and needs everything on his screen larger than standard. The issue is when running a Citrix application [Xenapp], the mouse is not scaling properly.
...
- 333