Latest Server related questions

Score: 0
iptables rule with network interface not working
co flag

I have problem that if in IPTABLES I insert network interface it's not woking if without network interface it's ok.
My iptables:

and if I use rule like this, it's working:
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
If I add interface not working:
-A INPUT -i ens192 -p tcp -m tcp --dport 22 -j ACCEPT


Whe ...

Score: 0
Unable to restart nginx, I think something to do with port 80?
by flag

I am following Corey Schafer's flask tutorial.

I am trying to deploy to a Linux server, but am unable to get nginx working.

These are the commands I have run so far:

sudo apt install nginx

pip install gunicorn

sudo rm /etc/nginx/sites-enabled/default

I have then tried to create and edit a new file:

sudo nano /etc/nginx/sites-enabled/flaskblog

This is what I input into that file:

server {
    listen  ...
Score: 0
ya chen avatar
Error when create a MicroK8s cluster : Connection failed. The hostname (xx) of the joining node does not resolve to the IP "xx". Refusing join (400)
th flag

I have installed microk8s(1.24/stable) on two machines. The ip of the two machines are:, I operate the command at add-node


From the node you wish to join to this cluster, run the following:
microk8s join

Use the '--worker' flag to join a node as a worker not running the  ...
Score: 0
Export Local Group Policy Settings to Another Computer
in flag

I have a problem that can solve, a client of mine have access free laptop for young people to research job or do paperwork. Those laptop cannot be on the domain. The administration of those computer is done via the "Veyon" application.

I create on each of them a user account with really strict Local Group Policy Settings and now I want to export those GPO to the other user on the 8 laptop.

To this e ...

Score: 0
pcspkr not producing sound using beep (Proxmox): debugging ideas?
my flag

I'd like to use the beep command for simple diagnostics for my headless Proxmox-machine in case networking fails. While the BIOS-beep and even the GRUB-beep work fine, issuing beep via SSH does not produce the expected sound; instead, a short "clack" -- like plugging in speakers -- and a command-corresponding pause is all I get.

Steps taken:

  • I installed a known working pcspkr (hardware) and confir ...
Score: 0
robinDoors45 avatar
Cyclone DDS: running ddsperf script
de flag

I have a problem running the perfscript that comes with Cyclone DDS, see Here, to measure throughput and latency.

I have a setup with two identical containers that cloned, built and installed CycloneDDS and they can both ssh into each other without passwords (this is just for testing). Both containers are able to talk to each other when I manually use ddsperf on them (run pub on one, sub on the other ...

Score: 0
Cannot connect to FileMaker Server through Wireguard VPN tunnel
de flag

I have setup a Wireguard VPN tunnel between a hosted VPS (running Ubuntu 20.0.4) and a FileMaker Server box on my Home LAN. From the VPS in the ping the FMS box via the command line and a php script. I can also SSH into the FMS box from the VPS so the logical conclusion is the VPN tunnel is working.

However the front end website (php api based) on the VPS cannot connect to the LAN based FMS datab ...

Score: 0
Maksat Baigazy avatar
ip link add test_team_slave type team_slave - RTNETLINK answers: Operation not supported
cn flag

Trying to set up teaming on a Crux Linux with a custom kernel. I have teamd and teamdctl already installed on my system, I managed to find kernel modules for teaming and successfully enabled them. Tested it by running ip link add testTeam type team, which was failing before rebuilding the kernel. Right now I have issues with the team_slave type, and I can't find which module I am missing. I would app ...

Score: 1
Arjun Mehta avatar
Memory not available but no process is using it
ao flag

We are using a centos 7 server. The free -m command has the following output.

[root@211 ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:          31841       31173         389           0         278         178
Swap:        382975          45      382930

It shows that most of the memory is being used. It's not used for caching the filesystem but by s ...

Score: 0
What's the deciding factors of the number of tcp ack packages for a tcp data-transmission request?
cn flag

I encountered a counterintuitive phenomenon that the rtt(Round-Trip Time) of request from client to a low-network-latency server(ServerL) is higher than the one from the same client to a high-network-latency server(ServerH). The interaction between server and client is quit simple: Client just sends a large bytes stream (1~2M bytes) and server accepts all the bytes and reply a simple ok return code.

Score: 0
Balaïtous avatar
How to disable Docker Network Isolation?
ve flag

I use gitlab, gitlab-runner, sonarqube, nexus, ... with docker compose to test build chains before implementing them on my company's servers. These servers use the same network bridge.

This worked fine on my old ubuntu, but since I'm using debian, containers on the default bridge can't connect to the docker compose bridge anymore.

Since this is not an operational instance of docker, how can I disabl ...

Score: -1
Zoey Malkov avatar
What records can I delete and change
in flag

I own the website which has the IP 123.456.789.12. Its hosted with HostingCompany and the nameservers are hosted with Cloudflare. Cloudfare auto generated my DNS records. Which record actually makes it so when customers visit or it takes them to my website? I have 9 A records like autoconfig, autodiscover, cpcalendars etc which I think are essentially useless to  ...

Score: 2
synacksoldier avatar
Why does my RSA DANE TLSA work, but my ECDSA DANE TLSA fail?
id flag

I've purchased two single domain, wildcard SSL certificates from Namecheap/Sectigo/Comodo. I generated my CSRs in the typical fashion using openssl.

$ openssl req -newkey rsa:4096 -keyout -out
$ openssl genpkey -genparam -algorithm ec -pkeyopt ec_paramgen_curve:P-256 -out
$ openssl req -newkey -keyout ...
Score: 0
Irfan Habib avatar
nginx reverse proxy not working when multiple ports defined for REST api
bd flag

I have a next js app which I deployed on port 3000 and set the proxy 3000 on nginx.

Now I have my custom Node js Backend server which I want to run on the same server on different port 5000.

I setup the nginx like this

location / {
        proxy_http_version 1.1;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
Score: 0
Need help in Moving files to the backup directory except the last 10 files based on file NAME not date modified
gb flag

I have a situation where a server is creating journal files (MJ00001-MJ000x) and I want to move all the files to a backup directory but need to keep the last 10 in there to get the archive. I looked at robocopy and Powershell Move-Item but the problem is the date modified is always the current day as the server looks to them if they are in the directory (hence I can't use move keeping last 10 based ...

Score: 0
Pro Poop avatar
Cant access localhost from another device despite opening port on firewall
in flag

I am trying to access a simple web server on my main machine from my phone. I got my ipv4 IP and opened the port on the firewall, yet I still can't access the port! I just get a timed-out error on my phone. I checked if both devices are on the same network, and they were. Does anybody know any other possible causes of this?

Score: -1
e1630m avatar
Anyone else got a weird DMCA takedown notice on GCP?
cn flag

I have a VM instance on GCP, and I have received the following mail from


Google has been notified, according to the terms of the Digital Millennium Copyright Act (DMCA), that some of the materials in your Google Cloud Platform project, [redacted but this is correct my project id], allegedly infringe upon the copyrights of others.

Unless you resolve this alleged infringement w ...

Score: 0
kebugcheck avatar
OpenWRT allow IPv6 access LAN host from the Internet
cn flag

I'm new to IPv6 and trying to figure out how to properly configure my router so that I can access a web server through OpenWRT from the Internet.

With IPv4, I use port forwarding. For example, forward port 8080 of the WAN interface to This way I can access the webserver using my public IPv4 address at port 8080.

With my rudimentary understanding of IPv6, I assume I can have OpenW ...

Score: 0
Aabir avatar
nameserver issue after migration
ng flag

Recently I have transferred all of my Cpanel accounts to another server by "Transfer or Restore a cPanel Account" (Remote User Account Transfer) Using my previous server IP address and user pass.

Note: Previous reseller account user was "example1" and currently I have created the same user name with the same domain on the new server as a reseller account and all Cpanel accounts transferred under this re ...

Score: 0
Matts Cloud avatar
When Modsec is turned on. Google Publisher centre cannot read my RSS feeds
cn flag

I have a strange issue with this

When I have modsec turned on. My Google News RSS feeds wont work, And I cannot get instant indexing to work because the feeds wont show in my publisher centre.

if I turn modsec off. It works. RSS feeds show in my publisher centre and I can get instant indexing in google

Score: 0
pfSense with FRR not sending RIP advertisements
gp flag

I've been banging my head against this for a week, on and off.

I have a pair of pfSense firewalls (2.6.0-RELEASE) configured for high availability. They support an internal LAN, a DMZ, an OpenVPN server, the SYNC interface and are multi-homed (although one is not yet active).

I've been trying to get them to advertise routes to the DMZ and the OpenVPN connection onto the LAN interface with RIP. This  ...

Score: 0
snuffleupagus yelling about disabled functions in phpmyadmin setup
in flag

What I am working on is a self setup arch with a LAMP stack, onto which I also want to add phpMyAdmin, and it is complaining about some disabled functions.

Here is the file after I have commented out everything phpMyAdmin was complaining about, compared to the recommended default.

I am not entirely sure why phpMyAdmin complains about these defaults but I have also tried a brief installation of matomo and ...

Score: 0
home networking issue - can't redirect wifi sites to website
my flag

First, I am an amateur when it comes to networking/routing. I have an Internet-accessible website on a home computer that I use to test html/javascript/etc. I have a domain name and a static IP from my ISP. The network is currently set up like this:

Smart/RG SR400ac - this is the router/modem and connects to the outside Internet. The only device plugged into it with an ethernet cable is a Netgear R6900 ...

Score: 0
hackerone member avatar
If i find port X open on an ip address, is it safe for me to assume that i will find a web server at domian:X where domain resolves to the ip
de flag

Lets say resolved to 36.45.6.x, and i port scanned that ip and ports 80,443,8080 came up and nmap tells me they all have http web servers running on them, is it safe for me to assume that if i visit a webserver will reply? like can an ip have port X open but in order for me to access it via hostname i have to go ...

Score: 0
Jankiel Goldman avatar
What is this SSH syntax?
us flag

customer has a kind of proxy system for securing access. The way it access is as bellow from powershell (OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2):

ssh myAllowedUser[]

Where is this syntax from? I've tried to replicate this, thinking if it was a ProxyJump, without success

-J [user@]host[:port]
             Connect to the target host by first making a ssh co ...
Score: -1
Windows 10, before browsing, hard drive size 120 GB, after browsing facebook and watching some videos, size is 125GB
eg flag

I have Win10, when I turn on my laptop, C drive has 120GB, after browsing some videos on facebook and youtube, it gets to 125GB. After I restart my computer it gets to 120GB, why is that?

Score: 0
Access mysql from another computer connected with crossover cable
cn flag

I have two computers, and i am trying to access mysql via network on port 3322 (mysql listens on this port)

Computer A Server: Windows 10 home Added firewall exception to port 3322 (mysql installed and listens on this port) Static IP address: Subnet mask: connected via onboard ethernet port

Computer B Client: Windows 10 home Static IP address: Subnet mask: 255. ...

Score: 1
The same message delivered multiple times on postfix
in flag

I have a problem with the postfix server I manage.

Server was working fine for over 4 years, but recently I have one issue with it.

Some e-mail messages are delivered on "my '' server many times. Those multiplied messages come from some big providers like amazon ses or zoho mail. I have found a similar thread on zoho forum, but it ends with a private message to zoho admins and I can't see how this s ...

Score: 0
Ansible regex_search module
cn flag

Can anyone please help me to explain this code in ansible regex_search module:

- set_fact:
    regex: "{{ '/opt/conf/path.txt' | regex_search('/?(.*)', '\\1') }}'
  • What "\\1" means in this code.
  • What is the function of each special letter in '/?(.*)'
Score: 1
Best way to reformat a JSON with Ansible?
cn flag

I have this JSON in a variable :

"device_vlans": {
    "1": {
        "name": "default",
        "interfaces": [
    "20": {
        "name": "VLAN20",
        "interfaces": [
    "30": {
        "name": "VLAN30",
        "interface ...

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