Questions tagged [socket]
A socket is an abstract network construct with a sending and receiving side. In most modern operating systems (OS) there are device representations, and programming tools to address sockets.
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php-fpm creats only one socket file
I have multiple virtual hosts with unique domain names, users, and root directories for each on Nginx and php8.1-fpm.
In the /etc/php/8.1/fpm/pool.d/domain.com.conf contains
user = domainuser
group = ...
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Python gethostbyaddr being slow
I'm facing an issue today I can't explain and I'm hoping someone will be able to put me in the right direction.
I have a fleet of EC2 servers running a python script. When a user connects to my ...
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Can not ExecStart service python script as root on Linux
OS: Ubuntu 20.04.6 LTS
I created a service that executes python script checker.py. The problem is this service does not execute python script with root privileges, although sirjay user has root ...
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Portainer can't access docker socket without chmod 666 workaround
Environment: Alpine Linux (3.18)
I've got a portainer docker container that can't access the docker socket. I've added my user to the docker group. I make the container with the following command:
...
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AppArmor rule to allow QEMU to create a char device socket in a directory
Given the following command line for QEMU (from this page):
qemu-system-x86_64 -machine accel=kvm -cpu host \
-m $mem -object memory-backend-file,id=mem,size=$mem,mem-path=/dev/hugepages,share=on \...
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PHP Error waiting on socket
I'm getting problems with ssh2 and fread php function that started on a few days.
On the apache error log show:
ssh2_connect(): Error starting up SSH connection(-9): Error waiting on socket
fread(): ...
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2
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639
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Fork connections out from a single socat connection
I have an old legacy application I’m trying to get to work with our semi-modern network. This application sends log messages as HTTP requests (one log per request) but does so over a single TCP ...
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ping 100% packet loss - can't ping to server
when I try to ping my newly created server it shows:
vasanth@vasanth-client:~$ ping -c 4 server.ip.name
PING server.ip.name (server.ip.address ) 56(84) bytes of data.
--- server.ip.name ping ...
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578
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clamav-daemon doesn't create /var/run/clamd.ctl
I installed clamav-daemon on Debian 11 and when I try to start it, it doesn't create the LocalSocket /var/run/clamd.ctl.
LocalSocket in my /etc/clamav/clamd.conf:
LocalSocket /var/run/clamav/clamd....
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How to track file lifetime using lsof?
I have read article https://tailscale.com/blog/case-of-spiky-file-descriptors/ where author investigates anomalies with the amount of open file descriptors.
He said that made snapshot of open files ...
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670
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Start Apache on-demand using systemd socket activation
I have a local website on Debian 11 which is rarely used so I thought I might want to start Apache using systemd socket activation when visiting the site and then shut down after few minutes of ...
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How do I setup a SSL certificate for an express.js server behind a load balancer?
I'm restructuring my server structure by splitting them up instead of running everything from one server.
I looked here but that just specifies what I were already doing in the original setup with ...
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618
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Client Listening on 0.0.0.0 when custom network interface doesn't exist?
I'm facing an issue in our environment where I'm starting a ServerSocket (Java), and configuring it to listen on 0.0.0.0.
Then I'm creating a network interface, and my client is attempting to connect ...
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ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
EDIT: The following describes my original question, but as long as I haven't resolved the issue yet, I thought maybe I should change settings inside the created mysql POD instead of mysql config files ...
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Which machine is actually closing the TCP socket and why?
I'm working on a C# application, handling TCP sockets.
I have a server application (Hercules) on the remote machine, trying to keep a socket open.
I have my application on my machine, subscribing to ...
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Reached pm.max_children, High sockets allocated, No CPU usage
The issue
I have a server that reaches pm.max_children (200) without spike in CPU usage. No network traffic (MB out / MB in) but extremely high number of socket allocated that do not get closed.
CPU: ...
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How to tell whether a linux tcp socket had recent activity?
Most of the time, when changing or upgrading a network service, I would do this during maintenance hours but some services are rarely used so it is tempting to just check whether it is currently in ...
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How to open communication PYTHON socket with a SERVER SOCKET on AWS EC2 to a CLIENT SOCKET on my local pc?
Sorry my english is not good
I want to established connexion from my client socket on my local pc to a host server socket on AWS EC2 instance.
I'm trying to follow suggestions from here and code from ...
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How are Linux ACLs different for files versus sockets
With umask 0022, using default ACL entries default:user::rwx, default:group::rwx, default:mask::rwx and default:other::rwx for a directory, files created with touch (e.g.) have a mask of rw, and ...
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How to create multiple pools on LEMP Stack, PHP 8.1?
I need to optimize my web app performance, with that in mind I created two PHP-FPM pools for frontend and backend and their respective users. Both pools are listening to different sockets on /etc/php/...
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894
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Does information piped through a Unix socket touch disk?
I'm trying to understand how fast different IPC mechanisms are, and I know it's possible to create a Unix Socket as a "file" in a directory on a filesystem, but what I don't understand is ...
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Sockets: divergence in behaviors between linux and windows when binding to INADDR_ANY *and* another address with the same port
Say one attempts to bind two sockets respectively on the two addresses "0.0.0.0:12345" and "127.0.0.1:12345".
Depending on the platforms I tested this on, the behavior changes.
On ...
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kubernetes pod with a socket connection not firing 'close' event
I have a Kubernetes deployment where a pod connects to a client via TCP Socket. On connect and disconnect different events happen. In the dev environment the server can respond to connections, data, ...
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504
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configure inactivity timeout while handling keepalive probes
I am developing a TCP echo server using python and the socket library.
I'd like to have a timeout configured for each incoming connection. So to drop and close them if there is inactivity for a ...
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750
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Ansible - No such file error when activating systemctl Podman user socket
I am running an Ansible playbook on a fresh Oracle Linux 8 system. It includes a step where it asks systemctl to activate a user Podman socket like so:
- name: Enable podman socket
vars:
userid:...
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314
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Hosting a Python sockets server on the web
I made a simple chat app for my friends and I to use, but I don't want to host the server on my computer, I want to host it on the web. Does anyone know any good services or tutorials on doing this?
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998
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IPTables log connection pid on OUTPUT chain
I'm trying to find pid of a socket using iptables OUTPUT chain log, or even better adding it into the log.
My current iptable rule:
sudo iptables -A OUTPUT -j LOG --log-prefix='[PID]' --log-level 7 --...
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PHP socket connection through XR300 router to a receipt printer
I have a PHP application which is attempting to open a socket connection to a printer through my router.
A couple things to note - my networking skills are lacking so I may be missing something ...
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Failed to get properties: Unit name [email protected] is missing the instance name
I've recently upgraded my MariaDB servers from 10.1 to 10.6 and now when I restart services for example wildfly, I get this message :
sudo service wildfly restart
Failed to get properties: Unit name ...
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How do I create a python 3 service that uses socket with systemd?
I am trying to create a service with systemd, where I use python3 to create a simple socket and leave it as a daemon, but I have made several attempts but in both cases without any success. For today ...
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Fail2ban socket permissions reset on reboot
I have some specific group/permissions set for my fail2ban.sock file to make Zabbix able to monitor Fail2ban as described here https://github.com/hermanekt/zabbix-fail2ban-discovery-
I added the ...
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672
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Mysqli access denied , using UNIX socket [duplicate]
I am trying to learn PHP, and I am setting up the database connection.
On Mysql Workbench, I created a database called php, and created a table.
Then I created the account "sam"@"...
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Why am I getting "Connection refused"?
I am running a hello-world http server on an ubuntu EC2 instance, let's say, myurl.com. I am unable to curl it from my client:
$ curl myurl.com:4296
curl: (7) Failed to connect to ...
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Socat - is it possible?
Is there any way to listen and execute a command ( for every connection ) while port forwarding with socat? A non-working example to make it more clear:
socat TCP-LISTEN:8080,reuseaddr, "exec:ls&...
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437
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Not seeing a packet sent from a client to the server in Wireshark
I am new to socket programming and have a couple of questions.
For the context, I have a server and client with each having a socket opened: the socket on the server is bounded to INADDR_ANY which ...
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618
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How to find out which kernel module opened a socket?
When I try to find the process for an opened socket using e.g. ss I get the following output:
❯ sudo ss -tulpen
Failed to open cgroup2 by ID
Failed to open cgroup2 by ID
Netid State Recv-Q Send-Q ...
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771
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ssh port forwarding with permament connection between remote and destination
I know you can use ssh to forward a local or remote port to another destination and port. So for example let's say I have this command:
ssh -L *:8443:10.0.0.1:443 [email protected]
So this allow to open ...
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1
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498
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Start systemd socket on VPN connection automatically after boot
One of my servers is setup so that it will automatically connect to a VPN after booting up using a systemd service. Now I want to host a systemd socket on this VPN connection. And the socket should ...
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Curl : Recv failure : Connection Reset By Peer and Unix Socket Crash
I'm trying to set up a unix socket for gunicorn and to ping it from curl (running curl --unix-socket /run/gunicorn.sock http://www.example.com --trace-ascii dump.txt). Unfortunately, the response from ...
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Python sockets: TCP errors in linux, while same program works fine on Windows10
I'm trying to communicate with a commercial power supply device via TCP/IP using python sockets.
I tried using both a virtual linux(centos8stream) and virtual windows10, both running at the same ...
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How to open a socket on EC2 instance?
I want to send webcam video from my laptop to aws EC2 instance.
I'm trying to follow suggestions from here and code from here.
The issue I'm facing is that I do not know how to open a socket and ...
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705
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Serving multiple socket using gunicorn and Nginx cause a NotFound error
I am trying to serve two Flask apps using Nginx as a reverse proxy. In my default.conf which I have reloaded using sudo service nginx restart I have got:
location /app2loc/ {
include ...
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How to share unix domain socket between containers without named volume?
I have two containers A and B which needs to talk via unix domain socket created by A in /var/run/notif.sock.
I can't use named volume as sharing /var/run between containers is risky as it contains ...
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1
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4k
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How to change the docker.socket group
I am managing several compute hosts running Ubuntu 18.04 (with systemd) and Docker inside a mostly trusted network.
I have an auth server so rather than manually add users to the docker group, so that ...
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2k
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simple systemd service and socket failing
I had a service I was trying to run this way but it was slightly a large python program. I took a step back and built a dead simple python program to see if I can get it to run. It fails when I try ...
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Simple code running in systemd exits to fast?
I had this old code base running in xinet d. It was basically a simple python script that waited for standard in to come in on a socket, it would do something with it and respond on standard out. ...
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260
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Ububut 18.0.4 LTS:- unable to start TCP/UDP discard service on port 9 and time service on port 37
I have ubuntu client 18.0.4, I am unable to telnet localhost on port 9 and port 37.
root@ubuntu:~# telnet 127.0.0.1 37
telnet: Unable to connect to remote host: Connection refused
root@ubuntu:~# ...
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539
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OpenDKIM's UNIX socket and permissions for "others"
Postfix installation procedure created a system user postfix and it's primary group postfix while installation procedure for OpenDKIM created a system user opendkim and it's primary group opendkim.
To ...
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nginx logging to unix socket fails with protocol error
debian stable,
nginx version: nginx/1.14.2
I get the following error message (error.log) : connect() failed (91: Protocol wrong type for socket)
configuration file :
access_log syslog:server=unix:/var/...
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0
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445
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Enable GRO for UDP port explicitly
I am implementing a simple socket application in python and I need it to receive UDP packets with GRO enabled. I have checked that only the Python service is running and that GRO is enabled via
...
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