Greatest Hits

4
votes
2answers
23k views

Converting .cer to .pem?

I have zero knowledge on certificates . I searched on internet and found few , but none of them helped me in my case. I am on Red Hat Enterprise Linux ES release 4 (Nahant Update 9) I am trying to ...
1
vote
1answer
16k views

Adding alias to an Office 365 mailbox with dirsync

We've recently migrated to Office 365 with a new Active Directory structure and as part of this the naming convention for all the e-mail addresses has changed. This isn't a problem for most users, but ...
0
votes
4answers
16k views

Fortigate bandwidth monitoring

I have a Fortigate 200B with Forti OS 5.0. How can I watch the total bandwidth being used by my unit both incoming and outgoing? Thanks
0
votes
1answer
11k views

Postfix/smtpd: Client host rejected: cannot find your hostname

I'm trying to set-up a mail server, using postfix and dovecot. Everything works fine, and I can connect in IMAP using Mozilla Thunderbird. But when I'm trying to send emails using the smtp server, I ...
6
votes
3answers
28k views

How to set shmall, shmmax, shmni, etc … in general and for postgresql

I've used the documentation from PostgreSQL to set it for example this config: >>> cat /proc/meminfo MemTotal: 16345480 kB MemFree: 1770128 kB Buffers: 382184 kB ...
2
votes
4answers
8k views

“sudo service nginx start” fails but “sudo nginx” works - can't figure out why

I have a server that is close to new and having a problem with getting nginx to start as expected. I have configured another server basically the same way and it works there. I figure there must be ...
0
votes
3answers
9k views

SCCM - How to make new deployed applications appear in Software Center faster?

I am trying to make the process between SCCM deployments and the Software Center (configmgr) faster, if not seamless. Right now, applications generally take about 1-2 hours to populate properly. ...
4
7
votes
2answers
13k views

Filtering Security Logs by User and Logon Type

I have been asked to find out when a user has logged on to the system in the last week. Now the audit logs in Windows should contain all the info I need. I think if I search for Event ID 4624 (Logon ...
0
votes
2answers
13k views

Domain User Account Locks: Correct password used

I have a domain (DC is running Windows Server 2008 R2) and have the Account Lockout Policy enabled. When a user attempts to log into their PC (with the correct password) they receive the following ...
8
votes
1answer
51k views

How do you mount an NFS Share in Windows 7?

I have FreeNAS exposing an NFS. How do I access this from Windows 7? I have enabled the "Services for NFS" within Windows Features.
1
vote
2answers
8k views

You don't have permission to access /cacti/index.php on this server

in cacti.conf I tried to edit the default context from localhost to 0.0.0.0 (and everything in between). Now I only have Alias /cacti /usr/share/cacti <Directory /usr/share/cacti/> ...
4
votes
5answers
24k views

Disk IO slow on ESXi, even slower on a VM (freeNAS + iSCSI)

I have a server with ESXi 5 and iSCSI attached network storage. The storage server has 4x1Tb SATA II disks in Raid-Z on freenas 8.0.4. Those two machines are connected to each other with Gigabit ...
2
votes
1answer
15k views

DNS server can't resolve localhost name

I'm trying to set up an Apache server on my RHEL6.4 vm and can't because dnsmasq can't recognize the hostname for some reason: nslookup rhel64.example.com Server: xxx.xxx.xx.1 Address: ...
2
votes
3answers
8k views

PBIS Open AD authentication stops working on ubuntu with errors: “user accout has expired” and “is your account locked?”

We have been using PowerBroker Identity Services Open to authenticate active directory users from ubuntu hosts successfully for six months. Recently AD authentication stopped working on several ...
0
votes
1answer
20k views

How to force all traffic through VPN?

I have a openVPN set up on the server and I am using openVPN connect for my client. I have some internal websites that I need to access and some of them don't work. I want to make sure that when the ...
1
vote
1answer
12k views

pfSense routing between subnets behind OPT1 and LAN

pfSense short config summary: WAN interface is on a registered Internet block of addresses connected to ISP via fibre LAN interface has IP address 10.200.1.3/24 OPT1 interface has IP address ...
16
votes
6answers
3k views

Why is RAID 1+6 not a more common layout?

Why are the nested RAID levels 1+5 or 1+6 almost unheard of? The nested RAID levels Wikipedia article is currently missing their sections. I don't understand why they are not more common than RAID ...
10
votes
2answers
3k views

Why is Internet Explorer 11 unable to connect to HTTPS sites when TLS 1.2 is enabled?

Normally I don't use Internet Explorer at all. I use it only in design time for interface tests (development machine and with unencrypted http). Every week I run the SSL Labs server test which says ...
1
vote
0answers
3k views

ntopng: Host XXX.XXX.XXX.XXX is a flooder [NNN new flows in the last 3 sec]

I am exploring ntopng reports on my router and seeing, that one computer on my LAN is a flooder. ntopng says Host XXX.XXX.XXX.XXX is a flooder [NNN new flows in the last 3 sec] How to explore these ...
2
votes
3answers
5k views

Administrator can access all mailboxes - how can I stop it?

At our organisation the DOMAIN\Administrator account can access all mailboxes i.e. log in to Outlook Web Access as DOMAIN\Administrator and then open another mailbox and that users mailbox appears. I ...
2
votes
1answer
4k views

Forbidden You don't have permission to access /cgi-bin/mailman/

I just upgraded from Ubuntu server to 14.0.4 LTS and I can no longer access Mailman via the Web Interface. I get a 403 forbidden error (Forbidden: You don't have permission to access ...
1
vote
1answer
12k views

Unable to add a static route: SIOADDRT: Network is unreachable

I've been bashing my head against a wall for a few days trying to figure this out: My ifconfig is: eth0 Link encap:Ethernet HWaddr 00:50:56:BB:XX:XX inet addr:192.168.36.132 ...
6
votes
1answer
9k views

Windows feature installation fails with “The source files could not be found”

I am trying to install the Media Foundation feature onto a Windows 2012 R2 box in preparation for it to be used as an RDS Session Host. However, all attempts to install fail with: Installation of one ...
6
votes
1answer
14k views

VLAN tags not shown in packet capture (Linux) via tcpdump

I am adding a tagged VLAN onto eth0: #ip link add link eth0 name eth0.20 type vlan id 20 This results in: #ip link 2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc ...
2
votes
1answer
12k views

Install 32- or 64-bit Crystal Reports runtime on 64-bit server?

To run, our VB.NET application needs the runtime files Crystal Reports, developer version for Microsoft Visual Studio. (Support Pack SP8) We are installing our application on Windows Server 2012 R2 ...
24
votes
3answers
4k views

How do servers with redundant power supplies balance consumption?

I have several servers from the HP DL360 line (generations 5-8). Each of these servers has two power supplies installed. The 2 power supplies in each server are fed from different circuits. My ...
1
vote
1answer
10k views

iptables port forwarding (prerouting port 80) and firewall not working together

I have read many articles and answers on this topic and I have been in discussion with Linode support, but no one seems to be able to answer my exact problem. Seems easy - I'd like to use a iptables ...
1
vote
2answers
6k views

nginx: Log complete request / response with all headers?

We have an application server that sometimes hangs. We suspect it is due to a bad request from a client. Can nginx log the complete request/response (like fiddler captures) to files, so we can see ...
3
3
votes
2answers
3k views

Windows Updates taking a long time to install

I manage a WSUS server for a large number of servers in a shared environment. Recently I noticed that despite the scheduled install time configured via the local gpo of many servers, they were not ...
6
votes
1answer
12k views

Configure Squid as an HTTPS forward proxy?

Here's some background about my problem: I have a web service running on Heroku, with a dynamic IP address. Static IPs on Heroku are not an option. I need to connect to an external web service which ...
1
vote
2answers
9k views

Need help configuring Sendmail relay/Connection refused errors

I am running Ubuntu 10.04 with Sendmail in a VMWare VM. In my mail.log file I have thousands of Connection Refused errors, and I'd like to get rid of them. There are multiple errors each second and ...
0
votes
1answer
3k views

SFTP Error - Couldn't read packet: Connection reset by peer

I try to configure SFTP on Centos 7, on my first server it works perfectly, but on my second server when I try to connect me with : sftp USERNAME@serveripaddress I have this error : Could not read ...
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0
votes
1answer
5k views

Install RAID driver on HP DL380 G9

I'm trying to install RHEL 6.2 on HP DL380 G9, but the I cannot find the storage during the installation. I thought maybe RHEL 6.2 does not support HP P440AR contoller by default, then I go to HP ...
2
votes
1answer
6k views

Elasticsearch is using way too much disk space

I have a CentOS 6.5 server on which I installed Elasticsearch 1.3.2. My elasticsearch.yml configuration file is a minimal modification of the one shipping with elasticsearch as a default. Once ...
2
votes
2answers
14k views

How to find cause of main file system going to read only mode

Ubuntu 12.04 File system goes to readonly mode frequently. First of all I have read this question file system is going into read only mode frequently already. But I have to know if it's not caused ...
1
vote
2answers
9k views

subversion on apache - checkout failed: 405 Method Not Allowed

I try to setup subversion on an apache server. I followed this guide: [http://wiki.centos.org/HowTos/Subversion][1] If I try to checkout afterwards with Tortoise SVN a project I get the following ...
2
votes
1answer
8k views

Unable to mount '/dev/sda'

My server has two 2 TB hard disk drives in soft RAID 1. I can't mount /dev/sda. Output of parted -l root@rescue:~# parted -l Model: ATA HGST HUS724020AL (scsi) Disk /dev/sda: 2000GB Sector size ...
2
votes
1answer
7k views

Logstash, Kibana and email alerts

I am trying to setup email alerts using logstash. Right now it emails me EVERY time the pattern "Error" is parsed into my log file which can lead to a lot of unnecessary emails. I'd like to create a ...
13
votes
1answer
8k views

How does vm.overcommit_memory work?

When I use the default settings: vm.overcommit_memory = 0 vm.overcommit_ratio = 50 I can read these values from /proc/meminfo file: CommitLimit: 2609604 kB Committed_AS: 1579976 kB But ...
3
votes
6answers
11k views

vSphere ESX 5.5 hosts cannot connect to NFS Server

Summary: My problem is I cannot use the QNAP NFS Server as an NFS datastore from my ESX hosts despite the hosts being able to ping it. I'm utilising a vDS with LACP uplinks for all my network traffic ...
0
votes
1answer
12k views

How to install SSL Certificate on Windows Server 2012 R2 without IIS

I have a Windows Server 2012 R2 server running SQL Server 2012 with Reporting Services. I want to be able to use the Reporting Services Report Manager over HTTPS instead of the default HTTP. How can ...
0
votes
3answers
11k views

How to connect an ODBC DSN to nondefault SQL Server instance on default port?

We are migrating an SQL Server 2000 database on one server to SQL Server 2008 R2 on another server. The client application use a User DSN to connect directly to the SQL Server on the internet. I have ...
0
votes
1answer
6k views

upstream prematurely closed connection while reading response header from upstream

I am having issues setting up SSL for my Jenkins CI server. I use Jenkins behind nginx for a reverse proxy. I am getting these upstream prematurely closed connection while reading response header from ...
4
votes
4answers
19k views

Find out what high CPU usage apache process is actually doing?

Currently having a few issues with our server where, intermittently, we seem to get apache processes which just run and run, taking up 100% CPU. When running top, we see the following: PID USER ...
5
votes
1answer
5k views

nginx set variable in location

I am trying to optimize my nginx configs, so it would be possible to set one variable, and all location paths would update automatically. I have four lines in question: server_name php.domain.com; ...
2
2
votes
2answers
9k views

How can I map a network drive from another domain?

I am using terminal-service server with Windows Server 2012 and we have two terminal servers share trough NLB, users connect to a terminal in the DOMAIN1 domain with Remote Desktop Connection (see ...
7
votes
1answer
4k views

SSH key authentication using LDAP

In short: Would like a way to do SSH key authentication via LDAP. Problem: We use LDAP (slapd) for directory services and we've recently moved to using our own AMI for building instances. The ...
1
2
votes
1answer
8k views

Windows 8.1 domain computer cannot see it's own domain

Quite a perplexing one. I have a Windows 8.1 machine (completely up to date on patches from Windows update) that I want to join a Windows Server 2008 (R1) domain. When I log into the local ...
1
vote
1answer
8k views

Windows Updates not working via SCCM 2012 R2

We upgraded from SCCM 2012 SP1 on Server 2008 R2 to SCCM 2012 R2 CU2 on Server 2012 R2. Very simple site hierarchy - one site server provides MP, DP, SUP, etc. roles, and has WSUS installed (with all ...
1
vote
1answer
8k views

“CHECK_NRPE: Socket timeout after 10 seconds” HTTPS / SSL

I have configured NAGIOS server on IP address AA.BB.CC.DD (Linux Fedora 20), and Monitoring the host with IP address LL.MM.NN.OO (Linux Fedora 20). I have configured NRPE to run on port # 15666 ...