Latest Server related questions

Score: 0
Max Muster avatar
postfix : how to check the "from" server ip match server domain for all hops
se flag

I recieve spam emails where the sender server ip does not match the named domain like this examples:

Return-Path: <l.coupin@dtfibre.fr>
[...]
From: "Sparkasse informiert" <l.coupin@dtfibre.fr>
[...]
Received: from amdir.dtfibre.fr (amdir.dtfibre.fr [199.101.190.36])
    by my.example.com (my.example.com) with ESMTPS id 1DDEC74013E
    for <me@example.com>; Wed,  3 Nov 2021 07:16:1 ...
Score: 1
mdmb avatar
Extremely slow ssh for spot request EC2 instance
jp flag

I have an EC2 instance that I can't ssh into – the process takes extremely long, and if succeeded, I can't type any command in there. 3-4 hours ago this process was taking milliseconds.

What can I do in this scenario? I was trying to stop the instance manually, yet AWS tells me I can't do it as it is connected with Spot Request (and it's true).

It would be great if there is something that can be d ...

Score: 0
nico95 avatar
Loading speed / TTFB difference between DNS change and domain transfer?
ng flag

I am a Web Developer and primarily create Websites with Gatsby.js or Next.js. Most of my Customers either already have a Website or have bought some kind of web hosting to secure their domain name. Unfortunately, the Infrastructure they have bought is almost always not suitable for the Application that is developed and we need to relocate their data.

As transferring their domain to another server ...

Score: 0
uday kiran avatar
How to deploy to azure kubernetes using github actions when there is a new tag?
uz flag

I am trying to connect to cluster and create a namespace using github actions. And then doing the deployment using the yaml files saved in repository. Also, the acr container registry is being used here and creating a tag everytime using the short-ID of github commit. How to update the deployment to use the new tag once the push is completed.

The below run task is using static yaml files only.

name: D ...
Score: 0
Vahid Alimohamadi avatar
enable ceilometer and gnocchi on all domains
kz flag

I'm newbie on openstack and i'm trying to use gnocchi and ceilometer to collect data in all domains. But gnocchi only works on default domain.

This project is admin project and it's on default domain and the command:

~ gnocchi aggregates --resource-type image --start "2019-01-01T00:00:00" --stop "2022-01-01T01:00:00" --fill 0 --granularity 300 "(metric image.size mean)" "project_id=f5f6e3c428cc4250a08 ...
Score: 0
Windows VPN - Can't see network once connected, can't map network drive
bd flag

In short the problem is that when users connect to the VPN and try and map a network drive they can't see the server shares or the NAS on the network. This has has been working for about 2 years all through lockdown etc, it was a little temperamental but the majority of the time it worked. However, its now a case that majority of the time it doesn't work.

Office Network

 - Gateway: 192.168.16.1
 - Ser ...
Score: 3
Drewes avatar
X-Matching-Connectors exceeded allowed maximum
de flag

When sending some mails from Postfix to Outlook365 i receive an error:

Nov  1 08:00:00 mail postfix/smtp[16252]: B7E8079FA8F:
to=<somemail.dk>,
relay=somemail.mail.protection.outlook.com[104.47.7.138]:25,
delay=0.71, delays=0.06/0/0.1/0.55, dsn=5.6.211, status=bounced (host
somemail.mail.protection.outlook.com[104.47.7.138] said: 554 5.6.211
Invalid MIME Content: Single text value size (32784 ...
Score: 0
Rsyslog expression with $programname is not working
ng flag

got this in my rsysconf:

    $template TemplateLog,"%msg%\n"   
    $template DynamicLog,"%msg%\n"                                                                                                                            
    $template DynamicFile,"/var/log/%PROGRAMNAME%.log"    
    if ($programname == "test") then {local3.=debug    -/var/log/path.log;TemplateLog}                                  ...
Score: 0
jshen28 avatar
why adjusting socket buffer boosts PPS?
pw flag

I am using iperf3 to benchmark NIC (82599ES) performance (single port).

  • Ubuntu 18.04 with a self compiled 5.14.14 (from upstream stable git repo)
  • iperf3 3.1.3
  • 82599ES and jumbo frame enabled on switch
  • kernel parameters are more or less default

The command I am running is

# iperf3 -c <IP> -u -l 8000 -t 600 -i 1 -b 10G
[ ID] Interval           Transfer     Bandwidth       Total Datagrams
[  ...
Score: 0
HTTP to HTTPS Redirection for Server Alias
ru flag

I have two sites; myFirstSite.123 and mySecondSite.456 and using the Server Alias to redirect accordingly. There two conf file on my Ubuntu Apache server as follows;

It works for myFirstSite.123 forwarded to its https. But mySecondSite.456 is forwarding to https://www.myFirstSite.123. Not to its corresponding site.

I tried changing rewrite rules but still not working.

How can I fix this?

<VirtualHost  ...
Score: 0
xxestter avatar
PostgreSQL Log Rotation Size Reached File Limit
de flag

I have configured the following settings in PostgreSQL 13 on Windows.

logging_collector = on  
log_rotation_size='100MB'
log_truncate_on_rotation = on    
log_filename ='postgresql-%Y-%m-%d.log'

I have configured PostgreSQL to create a daily log. Is it possible for PostgreSQL to create another file (with the configured file name) and rename the existing file by appending with a different file name whe ...

Score: 1
valc avatar
DELL R320, Xeon E5-2450 v1, Oracle Linux 8 marks clocksource 'tsc' as unstable, random crashes under load
cn flag

I recently acquired used Dell R320 with Xeon E5-2450 v1, all firmware's are updated to most recent versions using Lifecycle controller. On boot dmesg reports:

microcode: microcode updated early to revision 0x71a, date = 2020-03-24 [   12.384040] clocksource: timekeeping watchdog on CPU9: Marking clocksource 'tsc' as unstable because the skew is too large: [  
12.395572] clocksource:                  ...
Score: 1
Eranga Heshan avatar
Forward traffic to a redundant container if master fails in Kubernetes
cn flag

I have a k8 cluster with a backend service (BS) and a database service (DS).

DS has a pod that contains a single PgBouncer container (a proxy for a Postgres server). BS sends its database requests to DS which routes back to this single pod.

I want to have a redundant pod inside DS to route the database requests in case the main pod failed. I don't want to route requests to this redundant pod unless  ...

Score: 0
Mahdi Jafari avatar
Can't start Apache because port 80 is taken by another application on Ubuntu
me flag

Recently I installed Ubuntu 21.04 and I can't start the Apache server from Xampp8.0. I have installed Nginx1.8, Postgresql14, Oh my Zsh, Xampp8.0, and ...

➜  ~ sudo lsof -i:80
[sudo] password for mahdi: 
COMMAND PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
apache2 971     root    4u  IPv6  25043      0t0  TCP *:http (LISTEN)
apache2 976 www-data    4u  IPv6  25043      0t0  TCP *:http (LIST ...
Score: 1
Noexec vs chmod -R -x for malware interogation?
br flag

I am setting up a Linux box to examine malware samples. I wanted to create a directory where I could safely unzip each sample and run very basic triage commands against the file to collect information about the sample (for example, hashing the sample). In order to make sure that I do not inadvertently execute the sample, I wanted to ensure that the directory contents is non-executable.

Is it sa ...

The Stunning Power of Questions

Much of an executive’s workday is spent asking others for information—requesting status updates from a team leader, for example, or questioning a counterpart in a tense negotiation. Yet unlike professionals such as litigators, journalists, and doctors, who are taught how to ask questions as an essential part of their training, few executives think of questioning as a skill that can be honed—or consider how their own answers to questions could make conversations more productive.

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