All Questions

5
votes
0answers
2k views

Configure BIND to prefer IPv4 without disabling IPv6

Our office network is internally dual-stack, but the connection to the rest of the Internet is IPv4-only. I've got BIND 9.9 set up on a Linux box to handle DNS resolution. Is there a way to ...
5
votes
0answers
240 views

How to debug failed checksums/flipped bits in TCP packets?

A web application we maintain recently encountered a very weird problem: three out of four virtual machines on two physical hosts had trouble connecting to the server of our payment provider via HTTPS....
5
votes
0answers
3k views

LFTP: certificate common name doesn't match requested host name

Using lftp to upload files to a remote server from two computers on my network. Using the exact same code this works fine on one and doesn't work on the other. Transcripts of a problem session and a ...
5
votes
0answers
975 views

CentOS 7: Fresh Install Firewalld doesn't work at all (Fatal Error: No IPv4 and IPv6 firewall)

I have the following problem. I just did an dvd CenOS 7 installation. After I boot into the system I normally login as the root user. From there I'm trying to configure Firewall on my server. As I'm ...
5
votes
0answers
686 views

Heapster + InfluxDB on Google Container Engine (GKE)

I am trying to figure out what the best way to run Grafana/Heapster/InfluxDB on my GKE Kubernetes cluster. From what I understand I cannot modify the kube-system namespace unless I want google to ...
5
votes
0answers
439 views

Environment variables not available on server after mod_rewrite, but works locally

I am working on a site where I am using SSI to set a variable on an HTML page that gets parsed and the variable is then to be picked up by a script after a mod_rewrite rewrite. This works on my local ...
5
votes
0answers
2k views

Newly installed programs in Server 2016 can't be clicked from the start menu

I created a new instance of Windows Server Datacenter 2016 on AWS (Version: 1607 OS Build 14393.321). When I install a new application and try to click on it from the start menu it does not work. ...
5
votes
0answers
6k views

SNMP differences in ifInOctets vs ifHCInOctets values

I'm trying to graph network usage on my router for a specific interface using data from SNMP. I know that ifInOctets/ifOutOctets is only 32 bit and will overflow for high speeds and make my graphs ...
5
votes
0answers
393 views

RabbitMQ two node high availability cluster intermittently breaks with Veeam backup jobs

The environment consists of two 2012R2 Virtual Machines running RabbitMQ in high availability (ha-all) on their Queues. I use Veeam to create snapshot backups that are sent offsite as part of the DR ...
5
votes
0answers
895 views

Where can I find the Dropbox log files?

I am running Dropbox on a Debian server. Once I start Dropbox using python dropbox.py start it stops working after a while and python dropbox.py status reports: Dropbox isn't running! I ...
5
votes
0answers
1k views

Nginx reverse proxy with dynamic port forwarding

I'm setting up a reverse proxy on Nginx. I need it to listen to multiple ports. I then would like to hit the exact same port on the backend server. Like this: http://frontendserver:9000 -> http://...
5
votes
0answers
334 views

Hyper-V Manager - Use HTTPS with WinRM

I've successfully configured WinRM on my Hyper-V server to use HTTPS. I am able to connect to it and execute commands from my client PC by using the same local username and password on both (they are ...
5
votes
0answers
5k 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, ...
5
votes
0answers
1k views

Latency (wait ttfb) on EC2

My application is crawling a website. I use this crawler : https://github.com/rfussien/leboncoin-crawler On my dev environment, the latency is acceptable (3-4 sec) but on my prod server (ec2 T2....
5
votes
0answers
538 views

VMware ESXi and Intel DC3700 (NVMe) Poor Performance Even With Intel's Driver

I'm running VMware ESXi 6.0.0 with the Intel DC3700 800GB. My VM is running Windows 10 x64 with 8GB RAM and 4CPU Cores. The entire VM is 32GB and sits on the SSD. I'm using CrystalDiskMark at 1GiB ...
5
votes
0answers
972 views

pfSense Internal Traffic Policy Based Routing

What is the current and correct way to apply policy based routing to pfSense internal traffic (originating from the firewall itself)? Creating a floating rule with the WAN interfaces selected, ...
5
votes
0answers
1k views

Is RSS (receive side scaling) in Windows considered unstable?

When asking a customer to enable RSS in their data center to improve network performance (very high UDP packets-per-sec rate), I was told that they generally turn it off, because after various ...
5
votes
0answers
912 views

UWSGI SIGINT/SIGQUIT received

I'm trying to use nginx with uwsi. I wrote uwsgi ini file and test it with uwsgi --ini site.ini Everything works fine. But when I try to run the site I got the following error (from log file): *** ...
5
votes
0answers
624 views

udev rule not applied on boot for mounted disk

I'm trying to persist a readahead rule on a mounted drive to use with mongodb. The mount is persisted using /etc/fstab and that works as expected. I have added a udev rule ACTION=="add", KERNEL=="...
5
votes
0answers
1k views

meaning of 'event_wait : Interrupted system call'

I manage several OpenVPN links. Sometimes while the VPN connection is UP for a few minutes/hours it suddenly gets down with the following (error) message: event_wait : Interrupted system call (code=...
5
votes
0answers
325 views

Low Entropy on Container

I am thinking my entropy level may be low? $ cat /proc/sys/kernel/random/entropy_avail I am around 132-178 on average. Pool size is default 4096 (this is a container on a virtualizer by the way). ...
5
votes
0answers
964 views

How do I fix a non-starting “Microsoft Key Distribution Service”? (not to be confused with Kerberos KDS)

The Microsoft Key Distribution Service is not starting on my DC (kdssvc.dll) and when I look at the event log under Microsoft\Kdssvc, I see the events: Event ID 4001 Group Key Distribution ...
5
votes
0answers
1k views

HP MSA P2000 G3 Disk Scrubbing performance?

I have a HP P2000 G3 array with two 10Gbit iSCSI controllers in it that presents storage to my virtualisation cluster. It is soon to be expanded with two D2700 shelves each loaded with 25 10k RPM ...
5
votes
0answers
11k views

chrome requests get stuck pending

Description of issue We have a web server that is serving static assets. We are experiencing a problem where after you browse around some of the http requests get stuck in the "pending" state. In the ...
5
votes
0answers
3k views

Wrong filename encoding/decoding when downloading recursively with wget

I'm downloading files from a remote directory recursively using wget and whoever created the folders and files, used special characters such as è or Ó, when I download a single specificating the full ...
5
votes
0answers
409 views

Blue-green deployment for Jenkins itself

When I tinker with my live Jenkins instance, I risk down time. Thus I want to run blue and green Jenkins master instances. This way, I can work on one while the other is live and stable. As ...
5
votes
0answers
362 views

Virtual terminal PCI compliance

The PCI DSS compliance rules say that if we use any computers to take card payments via a web based virtual terminal, then those PCs must be isolated from the rest of the IT network (otherwise the ...
5
votes
0answers
971 views

Make LXC containers directly accessable with ipv6

First off I have a special IPv6 address allocated to my dedicated server, just 1. A ::1/128 one. But I can assign addresses to eth0 (eg ::2/128, ::3/128, etc). Now I would like to run LXC containers ...
5
votes
0answers
164 views

How to clone the OS disk and keep both disks plugged in?

Here's the situation: A Windows RAID 1 has partially failed. The broken disk was replaced with a new disk. The old two disks do not have Advanced Format (bigger sector size). The new replacement disk ...
5
votes
0answers
2k views

Immediate handler, or flushing just one handler, in Ansible

(Related to Callbacks or hooks, and reusable series of tasks, in Ansible roles): Does Ansible provide a way to flush notifications for just one handler? Like meta: flush_handlers, but for a single ...
5
votes
0answers
828 views

SNMP OID for VMware Tools on a virtual machine

I have an ESXi host running several VMs. I use snmp to query that host for information. I need to find if VMware Tools is installed on some virtual machine. Is that possible? and If so, which OID is ...
5
votes
0answers
199 views

Blank sent to default printer on RDP Win2008R2 with mapped printing

I’ve got an issue with a terminal server running Win2008R2 Enterprise SP1. My users have remote print mapping enabled (as it is imperative for their day-to-day duties). When they log in, RDP will ...
5
votes
0answers
869 views

IPSec bandwidth between two Pfsense hosts has predictable, variable bandwidth

I have a IPSec tunnel between two Pfsense machines. Both machines are connected to a 100mbps symmetrical connection. The latency between the two routers is ~70ms. I'm using AES-GCM-128 and SHA1, both ...
5
votes
0answers
461 views

Installing MSA (Managed Service Accounts) using Windows deployment tools

I have to install several new application servers (2012R2) for a project which will run IIS and MSMQ. I need to script the complete install, so I need to be able to change permissions on IIS ...
5
votes
0answers
1k views

IIS 8.5 forces incorrect Content-Length header

We have a application that generates PDF files dynamically and forces a download of a the file. This code was working without issue on a Windows Server 2008. From what I can tell it appears that IIS ...
5
votes
0answers
1k views

TCP congestion collapse

I am experiencing suboptimal performance on an EC2 instance connecting to an RDS instance. This particular instance was built before VPC's existed, so all the traffic is flowing through a single ...
5
votes
0answers
2k views

Dell OpenManage Web Interface Inaccessible

We've installed all the Dell server admin tools on our Ubuntu 12.04 Server box using the following command: sudo apt-get install srvadmin-all All the omreport commands etc work as expected but we ...
5
votes
0answers
1k views

Access website hosted on same server as VPN via the VPN

I have just finished setting up a OpenVPN server running on Ubuntu 12.04 and I have been able to connect to it from my own computer (the client). I am able to set up the VPN server to route ALL ...
5
votes
0answers
386 views

Slow authentication on Fedora VM due to /var/run/dbus/system_bus_socket connect timeout

I have this Fedora VM that for some reason after a while always starts having very slow "sudo" authentication (or an authentication in general, like GUI apps asking for credentials). It's will work ...
5
votes
0answers
3k views

can't access sub-subdomain: DNS_PROBE_FINISHED_NXDOMAIN

I can't access to sub-subdomains. For example http://electricien.synerciel.fr is working. But, for sub-subdomains http://electricite-lemonnier.electricien.synerciel.fr/ returns ...
5
votes
0answers
987 views

Apache + Php-FPM + APC : mode_deflate not compressing HTML output

I have prepared a server to run a Magento instance with: Apache + Php-FPM + APC The problem I have is that Apache is not compressing the HTML output from the Magento PHP scripts. In my .htaccess I ...
5
votes
0answers
362 views

Recalculate Windows inherited ACLs for hardlinks

How do I get Windows to recalculate the inherited permissions of a file? A tool (Mercurial) created multiple NTFS hardlinks to the same file from different directories. I can see them using fsutil ...
5
votes
0answers
1k views

Apache as a reverse proxy for GitLab Omnibus

I'm using GitLab Omnibus on a CentOS6.5 server. The gitlab nginx server listen on the 6543 port (Apache already using 80 and 443). I want to use Apache as a reverse proxy to access GitLab with that ...
5
votes
0answers
3k views

What is optimal IIS threading settings for a Win2012 server that does lots of slower web service calls?

We have a Windows 2012 Server that communicates to lots of other services via SOAP based web services using ASP.Net and .NET 4.5. These services tend to have higher latency (i.e. 2-6 seconds to ...
5
votes
0answers
410 views

Bugzilla extremely slow on EC2, RDS PostgreSQL

The Problem I have installed Bugzilla on an EC2 instance, using PostgreSQL RDS as my database. After entering a few dozen bugs, Bugzilla became unbelievable slow, and I get a lot of timeouts. Server ...
5
votes
0answers
885 views

Cannot set ACL on ACL-enabled EXT4 partition

I am trying to enable xattrs and acls on a Debian machine. I've (re)mounted the partition in question with user_xattr and acl. (/dev/md3 is the partition in question) root@fs01:/# mount | grep /dev/...
5
votes
0answers
843 views

Proxy Server setting stuck on Server 2003 R2 for Windows Updates

Stay a while and listen. This is going to be a long one. We've been having a problem the last couple of months with Updates on very specific Microsoft Server 2003 R2 Machines. This problem has ...
5
votes
0answers
559 views

Minimum Privileges for vmware user for Foreman 1.4 Compute Resource

I am currently trying to add a ESXi cluster I have into Foreman 1.4.1, and am running into a problem with permissions. Currently, I've given a service account the following rights: Datacenter-Level: ...
5
votes
0answers
343 views

To VDI or not? Having a central desktop for a group of old computers

I'm planning to work on a contract with a nonprofit organization that supports low-income areas in the South-east Washington D.C. area with computers as a community service so that people can use the ...
5
votes
0answers
1k views

Vagrant bridge to openvpn interface?

Setup: A box running OpenVPN server and few Vagrant virtual machines Problem: I would like to access Vagrant boxes directly from VPN clients as regular machines, and not on only few forwarded ports....

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