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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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2answers
911 views

OpenVPN and nginx port sharing : Adress already in use

I have an instance of nginx running on ports 80 and 443, and I would like to use openvpn with the port 443 in sharing. So in my server.conf I have this port 443 port-share 127.0.0.1 4433 proto tcp ...
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1answer
995 views

Simpliest unix non-blocking “broadcast” socket

I have non-regularly running program which outputs string, I need to send this output to some kind of socket which can be distributed out of docker container and which can be listened by multiple ...
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1answer
138 views

kill tcp port binding by deleting proc/[0-9]/net/… in linux

I have a script to call syscall Kill the process that holds a certain TCP port in Linux (ubuntu). But even if I do that, sometimes the port still remains in /proc/[0-9]/net directory binding the port. ...
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1answer
5k views

Socket IO combined with apache ssl server

I'm trying to run a NodeJS server on port 8000 along with my Apache server which has a ssl certificate. I'm using virtual hosts and proxypass to link from my apache website through the /node path to ...
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0answers
2k views

Docker: Nginx and hhvm socket configuration returns 502 Bad Gateway

I am trying to run nginx and hhvm with docker-compose and socket file configuration but it returns a 502 error. I can access to conf/hhvm/run/ from nginx and hhvm image. In the error.log nginx's file ...
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1answer
2k views

Cntlm error: too many open files

As the title says i have got some issues with Cntlm. I'm working with the 0.92.3 version and launched from the source code. What i am trying to do is starting Cntlm as a standalone proxy with ...
0
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1answer
96 views

How to start postgresql server with the socket at a different place?

Good morning. The title says it, but let me precise it. I am working with openbsd. The web server is chrooted in /var/www. So the good thing would be that postgresgl place its socket (and the lock, I ...
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1answer
545 views

Connection refused on RHEL localhost with running server

I'm running a Java based system on CentOs and I sometimes see that clients of a service experience "Connection refused" errors for short periods. The interesting is that the server is, at the same ...
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1answer
3k views

uWSGI TCP/IP host:port vs Unix socket

We are running a Python WSGI server (uWSGI) and changed to socket file instead of a tcp/ip localhost:port connection. Now our uwsgi logs are full of errors like IOError: write error SIGPIPE: writing ...
1
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1answer
481 views

Can't touch/connect to a unix socket from the same group

sudo ls -la /var/lib/redis/6379/ produces: drwxrwxr-x 2 redis redis 4096 Nov 28 23:10 . drwx-w---- 3 redis redis 4096 Nov 22 00:10 .. srwxrwx--- 1 redis redis 0 Nov 28 23:10 redis.sock ...
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1answer
75 views

Server response not being received

I have a python program that sends requests via a socket connection to a local 3rd party application which in turn forwards my request to a server. The server response then makes it's way back to my ...
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3answers
1k views

Cannot connect to mysql server ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

i try to connect to mysql server but it gives me socket issue i have edited my.cnf from /var/lib/mysql/mysql.sock to /home/mysql/mysql.sock Nb: the issue exist before moving mysql db file to the new ...
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0answers
29 views

Php-fpm corrupts my socket permission on startup

I've installed Apache2.2 with FastCgi module, and PHP-fpm on a Centos server. I configure FastCgi with an external server using the socket option: FastCgiExternalServer /var/www/cgi-bin/test/php....
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0answers
495 views

nginx won't connect to my socket due to insufficient permissions

I have the following setup for nginx and uwsgi to serve a cgit instance. # cat /etc/uwsgi.d/cgit.ini [uwsgi] plugins = cgi uid = nginx gid = nginx socket = /srv/http/cgit/cgit.sock procname-...
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0answers
385 views

Setting up phpMyAdmin on a 1&1 Managed Dedicated Server

I'm trying to set up phpMyAdmin on my Managed Dedi Server from 1&1 so that I don't have to log into my 1&1 Account to access the databases / so that my developers don't have to know my account ...
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1answer
27 views

Transport layer - who makes the demultiplexing phase?

I'm reading the computer network a top down approach 6th edition, and I'm at the transport layer. I understand how a packet from a client is sent to the server through the client socket, but when the ...
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1answer
1k views

Solaris: socket listening on a port (/etc/xinetd.d equivalent on Linux)

I've prepared a script that accepts a request on a server port, then process user input, provides an output through the same port and then dies. The script is not always running but starts when a a ...
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0answers
248 views

zabbix_agent + socat hanging with close_wait

I have the following setup: remote devices running active zabbix_agentd (version 2.0) using socat to tunnel through an HTTPS proxy. On the server side: Apache with a proxy service allowing CONNECT to ...
7
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1answer
20k views

Netcat not able to bind a listening socket

In my computer with Ubuntu 14.04 I can do things like this: $ nc -l 5349 -vvv Listening on [0.0.0.0] (family 0, port 5349) or this: $ nc -vvv -l 192.168.254.96 5349 Listening on [192.168.254.96] (...
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1answer
117 views

Ubuntu Mysql stop working after outofmemory in a clamscan, mysqld.sock

I'm having daily problems with postman with autentification througth mysql on my Ubuntu14LTS Server. I think the problem arrise after a clamscan scron that breaks in an Out of Memory. In some way ...
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0answers
277 views

Wireshark RST against TCP Zero Window

During application sharing with Microsoft Lync Client (Mac OS X), TCP ACK with RST flag is sent from my application end to Lync end against TCP Zero Window packets and call gets dropped. Image Link. ...
2
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2answers
526 views

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

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, ...
1
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1answer
59 views

Java TimeoutException on Ubuntu on SoftLayer

I have java application, that works fine on my local machine. But when I'm trying to start it on SoftLayer, ALL connection is toooo long. For example, simple http connection via HttpAsync or others ...
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0answers
2k views

Can't connect to (or write to) a socket file, despite being owner?

I am working on Debian Jessie with Django 1.8, trying to set up Gunicorn to run my Django site. I have made a user called opuser, and made this user the owner of the gunicorn.sock file and of the ...
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1answer
145 views

Why is the same socket in TIME_WAIT many times?

I have read other threads regarding sockets in TIME_WAIT, but I am clearly still missing something. Below is a few lines from a "netstat -an". How could it get into this situation? If I understood ...
3
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1answer
1k views

SSL - Apache and Node.js on the same Amazon EC2 instance

I hosted my website on an EC2 instance, using Apache. SSL was also set up properly, running on HTTPS, port 443. Currently, I just added a chat application to the website using Node.js + socket.io. ...
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1answer
174 views

Is “keeping alive connections” the smartest approach to access devices behind a router? [closed]

The problem I'm developing an IOT device that will connect to a common Wifi router. As you know in order to make this device publicly accessible from WAN you'll have to do some ports forwarding or ...
1
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1answer
81 views

Dest host dont accept UDP when there is no route to source

I have three hosts with following config: Host A: IP:192.168.1.1/24 Host B: IP:192.168.1.2/24 Host C: IP:192.168.3.1/24 Everything happens on CentOS 6, and all interfaces are VLAN tagged (if it ...
0
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1answer
403 views

Where to create an AF_LOCAL/AF_UNIX socket file when not allowed to write in /var/run?

FSH says that socket and pid files should go to /var/run However, for security purpose, only root can creates file and subdirectories in this location. A common solution is creating a subdirectory ...
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1answer
108 views

Will internal API calls be treated as DDOS attacks by AWS?

I have a nodejs development server. I am currently running on an AWS EC2 micro AMI. I have a hardware device which continuously submits data to this server via socket. The server then calls an API, ...
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1answer
89 views

Keep connections of closed instances behind a load balancer

I'm looking for a system to create a live sockets application through sockets.io and that can be balanced without problem. There are tons of solutions to balance the load between multiple socket ...
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1answer
86 views

IP address differences between two computers on the same local network [closed]

Why does the python command print(socket.gethostbyname(socket.gethostname())) give: 192.168.1.4 on my laptop 127.0.1.1 on my Raspberry PI when they're both on the same local network, and the PI's IP ...
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1answer
147 views

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 ...
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0answers
14 views

Route only on output chain?

I have two machines A and B. I want to send iperf traffic from A to B, but first have it route through a userspace program on A. I did this with a tunneling device: therefore, I used the command ip ...
3
votes
2answers
2k views

sudo: unable to create sockets: Cannot allocate memory

On a VPS run by OVH (apparently OpenVZ-based, given /proc/user_beancounters exists), with relatively few processes running, trying to sudo gives me the error in the title. Here is a sample transcript:...
1
vote
1answer
738 views

icinga2 mysql connection issue

I followed all the install wizards When setting up icinga2, I have the following error: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (13) I ...
0
votes
2answers
6k views

Redirect subdomains to services on different ports of same server

I have a VPS which has 1 IP. If I run two socket servers, one on port 8080 and the other on port 8081, is there a way I can map service1.mydomain.com to the socket server on port 8080 and service2....
3
votes
1answer
16k views

dnsmasq: failed to create listening socket for port 53: Address already in use

I got this error when i done the setup dnsmasq. ashokkrishna@krishna:~$ sudo dnsmasq dnsmasq: failed to create listening socket for port 53: Address already in use ashokkrishna@krishna:~$ netstat -...
0
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0answers
432 views

FTP Server error, A receive socket error occurred

I have a FTP server, Core FTP server, where i get errors for inbound transfers to one of the accounts. The inbound files are only 1k in size. The error occures in 5% of all inbound transfers. Error ...
1
vote
1answer
917 views

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 ...
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0answers
46 views

What are the minimum permissions for a libpam-ldap unix domain socket?

I'm setting up an LDAP server and libpam-ldap to run on the same host, communicating via a UNIX domain socket. I'd like to give this socket the minimum permissions necessary, so random local users can'...
0
votes
2answers
6k views

HAProxy max session limit

I have an Amazon OpsWorks stack running HAProxy (balance = source) and several node.js instances running socket.io. It seems HAProxy determines the max session limit for a given instance based on the ...
4
votes
1answer
4k views

Nmap external scan shows port open, ASA says port is not open, but do get an socket

Folks, have a weird one, need your expert help. For one of our heavily used external facing server which came up in an audit, nmap -Pn scan shows the following: Starting Nmap 5.51 ... Host ...
2
votes
2answers
4k views

nginx - why i can't use variables in proxy_pass path?

Why i can't use variable $user in proxy_pass - like in example below? server { listen 80; server_name ~^(?P<user>[a-z|A-Z|0-9|_|-]+)\.example\.net$; root /home/$user/webapps/; ...
9
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4answers
9k views

Siege: descriptor table full sock.c:119: Too many open files

I am trying to make a stress test in my own server using siege with the following command: $ siege -c 500 myweb.com/somefile.php But I get this error: [error] descriptor table full sock.c:119: Too ...
0
votes
1answer
19k views

node.js, socket.io only working on localhost, can't access from intranet

I am using node.js and socket.io for the real time notification system. I have tested node.js and socket.io with simple chat code, it pretty good with localhost but can't access the same from the ...
2
votes
2answers
14k views

How to let PHP connect to database by using UNIX socket (Joomla)

I'd like to have my PHP applications such as Joomla make use of the UNIX socket to connect to the local mysql database. I've already configured the php.ini with: mysqli.default_socket = /var/run/...
1
vote
1answer
421 views

How to work whit socket_file httpd (nginx-uwsgi)

I am trying to run Nginx/uWSGI/Django, the last remaining step is to run the socket_file all I get is a 502 Bad Gateway. Route my django application. #/home/deploy/webapps/myapp Configuration uWSGI....
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votes
1answer
3k views

WebRTC on standalone asterisk - no audio

After struggling with Asterisk for WebRTC for a few weeks now, I decided to put my problem on this forum. My Problem is as follows: Im not getting audio from WebRTC to WebRTC clients. I work in a LAN ...
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1answer
2k views

Can't boot Mysql on Centos 7

I've installed mysql on Centos 7 (mysql-community-server) as root. The problem is that I can't start the daemon with "service mysqld start", It never return me to prompt and even if I try to use ...