Latest Server related questions

Score: 0
Rushikesh Sakharle avatar
How to install Wifi dervers Realtek RTL8723BE/RTL8188EE 802.11b/g/n Wireless LAN Drivers in cent os 7
gd flag

i was using Realtek RTL8723BE/RTL8188EE 802.11b/g/n Wireless LAN Drivers when I was using windows but after centos installation, my wifi adapter is not showing please anyone help me with this?

Score: 0
C0deH4cker avatar
How to setup routing for a Linux VPN server with separate ingress and egress IPs
ke flag

I am setting up a Linux server as a VPN using Wireguard (previously configured via Algo, now doing it myself). My goal is to have two different public IP addresses: one for ingress (VPN clients connect here, e.g. 192.0.2.10), and one for egress (websites accessed from the VPN will see this as the client's IP address, e.g. 198.51.100.20).

I have tried doing this in various ways, and at one point in th ...

Score: 3
Change Windows from KMS client to Azure AD activation?
cn flag

Is there a known way to change existing Windows 10/11 devices from KMS client activation to Azure AD Education A3 / A5 or Enterprise E3 / E5 license activation?

Apparently when Windows 10/11 devices are being imaged and joined to Azure AD for pure cloud management, if they can find a local KMS licensing server within your local LAN, they will automatically join to that first before attempting to  ...

Score: 0
Martin Braun avatar
pfSense: NAT port range to SSH on several servers using aliases?
sb flag

In pfSense, is it possible to map several ports to a single port on several machines in a way that each port will target the same port on a different machine using aliases?

Here is a scenario and what I've tried:

I have 100 LXC containers running on 192.168.0.100-192.168.0.199. So I create an host alias LXC_ALL with the value 192.168.0.100-192.168.0.199. I also create a port alias SSH_LXC_ALL with th ...

Score: 0
Ehsan Hosseini avatar
Nginx proxy reverse multiple ports by url
um flag

I need to config nginx reverse proxy to listen 443 port and redirect to localhost and port from url address. Https://example.com/test/1234 Redirect to 127.0.0.1:1234 And it means client choose port on local host by writing in url.

Score: 0
Chris avatar
Iptables Bypass VPN for specific IP destinations ( From Eth1 -> tun0 to Eth1-> eth0 for IP X )
do flag

I currently have Raspberry PI setup as VPN Router. Everything works great except I'm unable to run my work VPN behind it at the same time. Rather than disable the whole house security, I'd like to add a firewall rule to bypass the VPN for a specific IP.

Work VPN Public IP: 15.15.15.15 eth0 Raspberry PI: 192.168.43.1 (LAN) eth1 Raspberry PI: XX.3.1.209 (PUBLIC)

Here is the current route script that c ...

Score: 0
Stefan avatar
Robocopy only copy *.vhdx files in root folder
mx flag

how can I copy with Robocopy only *.vhdx files in the root directory? It is important to me that the file attribute and secuirty is preserved.

I used

robocopy \\Server\Users ServerNew\Users /sec /mir /log:c:\logs\log.txt /v /tee /w:2 /r:0 /copy:DT

However, it keeps copying the subdirectories, which I don't want.

Thanks for your support

Score: 4
Qmails avatar
VPN instead of VLANs
km flag

My network have about 8 thousand user, who work in multiple buildings. There is frequent employee turnover, which currently forces changes in the configuration of vlans on the switch ports. In addition, we have many device manufacturers in the organization such as Juniper, HP/Aruba, Cisco, TP-Link and Huawei.

I would like to use only a few vlans on a switch: VoIP, printers, internal network (intr ...

Score: 0
What is the correct term for a subnet "served" by a router?
it flag

Imagine you have a router with a LAN port ip address 10.0.0.1. Assume the subnet is a /24. Assume no DHCP, just static ips.

You also have a server with the ip address 10.0.0.10 that is connected to the router.

First of all, I'm guessing that if you gave the server an ip not in that subnet, ie, 10.0.1.20, it would not be able to reach the router at all. Since routers are used to reach other subnets, i ...

Score: -1
Jerng Yue avatar
Is redundant power supply really redundant?
br flag

Apologize for my inexperience or if I am missing something important here...

Everyone kept talking about how good it is to have redundant power supply in servers, yet no one talks about a redundant power supply's distributor failing.

Correct me if I am wrong, redundant power supply consists of 3 major parts, 2x power supply units and a power distributor. Does the central power distributor never fail ...

Score: 1
JDBennett avatar
No Space Left On Device Error
vn flag

I have an AWS EC2 instance provisioned with 2 EBS volumes (the root and an extra block volume).

I am hosting several docker applications behind and nginx reverse proxy on this server. I am getting a

no space left on device

Error when trying to deploy a new image of my apps.

The root volume was initially provisioned with 8GB and the extra data volume was provisioned with 100GB.

In attempting to fix th ...

Score: 1
saq7 avatar
RHEL 8 - yum commands started throwing a 470 error
tr flag

I am using RHEL 8 on a Jenkins agent and have been trying to install the required dependencies using yum. After some trial and error, I started receiving the following error on

yum update -y

Error: Failed to download metadata for repo 'remi-safe': Cannot prepare internal mirrorlist: Status code: 470

Below is the full output

+ sudo yum update -y

Updating Subscription Management repositories.
Un ...

Score: 0
KoenDG avatar
HaProxy - Does prefer-client-ciphers mean the client can choose a cipher not supported by a server?
in flag

Considering a setup like this:

global
    # intermediate configuration
    ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
    ssl-default-bind-options prefer-client-ciphers no-sslv3 no-tlsv10 no-tl ...
Score: 0
Carlos Parisotto avatar
SNMP DES algorithm no longer working
eg flag

I just installed a server with Alma 9 and SNMPv3 is no longer working.
My devices are all with `MD5` and `DES`. With Alma 8 everything works OK, but when I try to use the same command in Alma 9, it gives me an error.
The command:
snmpwalk -v3  -l authPriv -u public -a MD5 -A "pass1"  -x DES -X "pass2" 10.1.11.21

When I use it on Alma 9: Invalid privacy protocol specified after -3x flag: DES
SNMP on ...

Score: 0
Gaurav Suman avatar
Docker containers not accessible from internet (using jwilder's nginx+letsencrypt solution)
cn flag

I have been using the jwilder's nginx + letsencrypt solution to access my containers online.

Last week my server crashed and after a restart, I couldn't access any of my containers from the internet. Accessing them from LAN works but I get "refused to connect" errors when I use the web address (I'm using DDNS with a domain I own).

Checking the logs, I immediately saw errors in letsencrypt logs like: ...

Score: 0
SAS avatar
Windows machine not routing traffic to correct NIC
aq flag
SAS

I have a windows laptop with two NICs. One is a wireless interface (used for general internet usage), the other is cellular modem using a SIM which makes it a part of private network (IP 10.100.100.12)

When both these interfaces are enabled, my routing table looks like

Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192 ...
Score: 0
espen4001 avatar
HP ML350G9 and Smart Array installation
gd flag

I have a HP ML350G9, with an array controller type 440ar. On the motherboard there are two 4xSATA-connectors, but when the 440ar is installed, it blocks those two ports.

I found this guide of how to install the 440ar, and one step is to disconnect the cables from port 1/2, but no step is to reconnect. In the picture in step 10, it is visible that the connectors are blocked. But I am wondering if i ...

Score: 0
TenG avatar
tcpdump shows these hostnames - should I be worried
us flag

I'm investigatinmg a strnage hang with our NextCLoud instance and think it might be todo with a misconfigured hostname somewhere.

I thought of using tcpdump to look at what addresses/names are being referenced.

I ran the command tcpdump -i enp5s0 > /tmp/tcp.log for about 5 minutes.

When I looked at the output, I found strange addresses. I do not think is is anything todo with the issue, but I' ...

Score: 0
e741af0d41bc74bf854041f1fbdbf avatar
How to automatically kill a Kubernetes pod that uses too much CPU?

I administrate kubernetes clusters running software that is not always perfect. Some have memory leaks, some have cpu leaks, some have both.

I would like to automatically kill the leaking pods. The ones who leak memory are easy, I just put a memory limit and they die eventually when they reach the limit. However CPU seems more tricky. I do not want to put a CPU limit, that will just make them slo ...

Score: 0
Heiner avatar
spamassassin complaining twice a week: cannot open file
cn flag

Our postfix/spamssassin complains irregularly but at lease twice a week via mail with the following message:

/etc/cron.daily/spamassassin:
Cannot open file /var/lib/spamassassin/3.004002/updates_spamassassin_org/1906307.tar.gz: No such file or directory at /usr/bin/sa-update line 1603.
Jan  2 05:39:18.671 [21712] dbg: logger: adding facilities: all
Jan  2 05:39:18.674 [21712] dbg: logger: logging l ...
Score: 0
pileup avatar
Many enabled FastCGI modules for the same site in Handler Mappings - which one is in use?
th flag

I went to check for some issue in the test server which was configured in the past.

I noticed that for that specific site in Handler Mappings, there are a lot of PHP FastCgiModules enabled.

So there is a list:

FastCGI
PHP_via_FastCGI
PHP5_via_FastCGI
PHP_via_FastCGI1
PHP_via_FastCGI2

and each of them map to a different PHP php-cgi.exe on the server (for different PHP versions that are on the server) f ...

Score: 1
Rajsekar Reddy avatar
how and why container and its image is getting deleted automatically?
dm flag

I have a zeppelin container running on centos7 and on every couple of days the container and its image is getting deleted automatically, and every time i have to to docker compose up -d.

here is the log

the docker-compose yml

version: '3.7'
services:
  dev-zeppelin:
    image: zeppelin-docker:latest
    container_name: dev-zeppelin
    hostname: dev-zeppelin
    user: '0'
    volumes:
      - ./logs:/ ...
Score: 0
Amirhossein eidy avatar
Alertmanager does not send resolved email
bj flag

I have configured an alertmanager and it sends alerts properly But it does not send resolved email. I have tried different amount of time for resovled timeout but it did not work here is my configuration I am running alertmanager and prometheus on centos 8 & 7 and using latest version of alertmanager I use alerts for many things like service status and os maintenance

---------define sender config ...
Score: 0
Mehul Kumar avatar
Multiple mail server from different provider for one domain is possible?
ph flag

I have searched in google before asking here. I got a mixed answer in google.

Can i have a multiple MX record from different mail providers?

Example,

Zoho Mail

[email protected] 
[email protected]

Google Webmail

[email protected]
[email protected]

Rediffmail business

[email protected]
[email protected] 

Is this possible?

Score: 0
Muhammad Ebrahym avatar
Client side certificate cannot be installed on Apple ios. Error-"The authenticity of "cloudflare" cannot be verified"
in flag

We use client side Cloudflare certificate to allow or disallow access to our site since the site is meant to be used by a small group of users who are provided a Cloudflare client certificate.

Our firewall blocks all requests from clients/browsers that do not have the certificate.

We are not using the certificate on a server - just on client side for the browser to pass to the server to identify the ...

Score: 0
Tobias avatar
Connect FreeTakServer with Sitaware Frontline
om flag

I am trying to exchange data between my FreeTakServer and Sitaware Frontline. Therefore I added a Outgoing Federation from the FTS to Frontline. But I am just getting an SSL error. What does it mean and how can I fix it ?

_ssl.c:1114: The handshake operation timed out
Score: 0
Guest Man avatar
Client is sending SMTP emails but they are not recorded in the "Sent" folder in webclients
sy flag

I have been using instantly.ai to send emails. I connected IONOS.ca and JustHost.com mailboxes to instantly and it works fine (warmup, receiving and sending [yes other emails receive the emails sent, and my mailbox inboxes show the warmup emails are coming in]). However, sent emails never show up in the webmail (IONOS.ca & JustHost.com mailboxes) sent folder.

I use SMTP/IMAP settings.

I tried sp ...

Score: 0
Bernd Wechner avatar
Postfix "Client host rejected: Access denied" how to diagnose the precise reason?
pk flag

I see this question asked over and over on serverfault, and each time it seems to accompanied by a copy of the configs and result sin a successful or not diagnosis by wonderfully helpful readers.

I would like to avail myself of such kindness if possible, but up the ante a little. As I see it, it generally boils down to the smtpd_recipient_restrictions setting. But it is generally quite a lengthy list, m ...

Score: 0
Mohammed Noureldin avatar
Routing packets from VPN interface to other pods change source IP
pe flag

I have a pod that runs WireGuard, IPv4 forwarding is enabled in that pod, thus all packets sent from WireGuard clients are routable to the other pods.

WireGuard client -> WG-NIC inside WireGuard pod --- routing table ---> eth0 (the interface managed by Calico) -> other pods.

The issue is, the packets that arrives to WG NIC and then routed to the other pods always have the IP of the eth0 of  ...

Score: 0
Exposing a mail service on port 25 using GKE
in flag
Sam

I want to expose a custom made mail server on GKE (Google Kubernetes) using a service of type LoadBalancer. I was able to do this on DigitalOcean's Kubernetes Service, but not on GKE.

I've read Google is blocking outgoing port 25, but there's nothing about incoming port 25.

I've tried exposing the mail service on another port, like 3000 and that works perfectly (testing with nc <EXTERNAL IP> 3000

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