Server Fault Stack Exchange
Server Fault Stack Exchange

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.

564 questions
2
votes
0 answers

Getting systemd-journald (219) to listen somewhere other than /dev/log

I would like systemd-journald in systemd 219 (on el7, so the package is systemd-219-30.el7_3.9.x86_64) to listen for syslog messages on /run/systemd/journal/dev-log, and have /dev/log be a symlink to that file. This is the default behavior of more…
larsks
  • 43,623
  • 14
  • 121
  • 180
2
votes
0 answers

Reaching maximum TIME_WAIT sockets (tried tcp_fin_timeout)

tl;dr: How do i get the kernel to drop TIME_WAIT/closing sockets as forcibly and fast as possible? I don't care about data being lost since I'm not sending any. I'm currently running a little test scenario on a very isolated machine. I'm running…
Torxed
  • 225
  • 1
  • 5
  • 18
2
votes
2 answers

Maximum number of sockets per server?

Pardon me if this question doesn't make sense! Is there any theoretical limit for the number of sockets that can be used simultaneously ? As per my understanding sockets are bound to ports and ports can have a value up to 65535, is this the…
akhilbaai
  • 21
  • 1
  • 3
2
votes
1 answer

Why is my unix socket created with a different ACL mask to other files?

I am deploying an Nodejs Express app. It is going to run as on the same box as an Nginx server, which will proxy requests to it via a unix socket. The question is not specific to Nodejs, however. The express app runs as user nodejs, and nginx runs…
Jarrad
  • 123
  • 4
2
votes
1 answer

Is it safe to pass my ssl key and cert files to socket.io?

I'm building a web chat using socket.io In order to communicate on port 3000 through https I need to pass my ssl key and cert files. Socket.io is an open source and I don't know how trustworthy it is to allow it to access such secured files as my…
Niv Apo
  • 121
  • 2
2
votes
3 answers

PHP7.0-FPM and Nginx don't work using unix sockets

I have a trouble that is not described in the web. I am using VPS Debian 8 Nginx + PHP7.0-FPM. My server gives php-files in a source code and does not compile them when I configure Nginx and PHP7.0-FPM to use unix sockets (I do it cause I've read it…
tlito
  • 131
  • 1
  • 3
2
votes
1 answer

Socket TCP server w/ high RTT and retransmissions

I have a TCP server built with sockets in Python. The application I'm building is time-sensitive, so the integrity of the data is important, therefore we need TCP. The bandwidth is very low. And there's a client which requests data from the server…
Robert Lucian Chiriac
  • 123
  • 1
  • 5
2
votes
0 answers

400 Bad Request while creating websocket between client and nodejs with Nginx as reverse proxy

I am trying to create a websocket using Nginx as a reverse proxy and nodejs at the back. I'm using ws library in nodejs. When I test it using wscat tool everything works fine but as I make request from browser, I'm continuously receiving 400 : Bad…
Satys
  • 183
  • 1
  • 2
  • 11
2
votes
2 answers

Centos 6; phpMyAdmin 'Cannot log in to the MySQL server' after moving mysql.sock

I recently moved my mysql datadir from /var/lib/mysql to a new directory /home/mysql mounted on a new hard drive. For neatness sake I thought it'd be nice to place the tmpdir and socket on this new hard drive. Everything works as planned, until I…
Arth
  • 365
  • 1
  • 5
  • 15
2
votes
2 answers

Do network administrators block outgoing traffic to not-well-know ports?

I've written a Java server to listen on port 49474. My client runs on Android phones all over the US. Of course, they will be connecting from a variety of networks: home, work, school, library, McDonalds. The traffic between the server and client…
Joe
  • 131
  • 4
2
votes
1 answer

127/8 address is not passed to IP stack?

I send IP/UDP frames using raw sockets with destination IP address from 127/8 range - e.g. 127.0.0.6. So, packets are sent over the network OK (checked using tcpdump on the target device). But on the target linux PC such frames are not processed,…
Sergey Ch.
  • 23
  • 2
2
votes
1 answer

How to use non-deprecated tools like ss to get process id running on a port?

I am looking for a non-deprecated way of running a command like netstat -tulpn | grep 8000 to output information about an active port. Any suggestions on how to use a tool like ss to get the process id? I have a localhost running on port 8000, but…
modulitos
  • 335
  • 1
  • 3
  • 16
2
votes
2 answers

Limit to number of listening ports in linux

I have tried to launch a script to listen to thousands of tcp ports (1000 to 10000) but it appears to be hitting a limit of 1024 listening ports. I've confirmed this via netstat and closed ports above certain ranges. Is there a fixed limit of…
loloy.batoytoy
  • 53
  • 4
2
votes
1 answer

php-fpm: What is the bottleneck for accepting connections faster?

On a php5-fpm status page, what is the bottleneck that is preventing my server from accept()'ing new sockets fast enough? pool: www process manager: static start time: 20/Jan/2015:16:37:18 +0000 start since: …
A.B. Carroll
  • 545
  • 1
  • 4
  • 11
2
votes
1 answer

SELinux: no audit errors but nginx permission errors

I try to isolate a SELinux problem with nging/munin. I see that error message in "/var/log/nging/error.log": [crit] 8802#0: *55 connect() to unix:/var/run/munin/fcgi-html.sock failed (13: Permission denied) while connecting to upstream, client: …
Lutz Reinhardt
  • 168
  • 7
1 2 3
…
37 38