Questions tagged [connection]
A connection generally refers to a TCP/IP connection, that is established as the result of the handshake between 2 hosts.
1
vote
1answer
28 views
Monitor outbound connections
How I can monitor outbound connection that are made from my server along with the program/application which has made the connection request?
I have tried using the below command and I am not much ...
1
vote
1answer
56 views
GCP Instance Connection Disruption
I am a novice GCP user trying to run 4 scripts in parallel on an a linux instance with 4 CPUs, 4 GPUs, 15 GB RAM, and 30 GB Disk space.
However, a few minutes after initializing my scripts, both ...
0
votes
2answers
37 views
Is it possible to watch the tcp connection packets on a connect call from the command line in linux?
Basically I want to do something like strace ssh user@host and instead of seeing the system calls, I want to watch the tcp connection packets as the connection is established.
I'm having this weird ...
0
votes
0answers
40 views
I cannot get two VMs to communicate on the same network
Good morning,
Prerequisites:
All VMs are stored on Power8 servers.
(10.45.0.0/16)
(255.255.0.0)
10.45.0.100 VM1
10.45.0.40 ES
10.45.0.101 VM2
10.45.0.102 VM3
I performed all the tests using ...
0
votes
0answers
17 views
Why does my REST server response time increase when I have more connections
A trivial example shows that latency of responses grows rapidly with open connections. I don't understand why this is. How can I address this issue?
For example:
var express = require('express');
...
0
votes
0answers
72 views
How to add RAS / EAP Credentials in Windows, in non-interactive, batch mode?
I want to make a fully automatic VPN client that does not require to enter a password through Windows GUI.
The server to which VPN will connect is configured as IPSec IKEv2 VPN with EAP-MSCHAPv2 ...
0
votes
0answers
35 views
Establish VPN connection from a client behind a Debian router
EDIT : My searches leaded me to GRE packets : they seem to be exchanged on IP port (not TCP one) 47. It seems to be quite painful to handle it with iptables. So question become : how can I transmit ...
-1
votes
1answer
64 views
Can't connect to my google cloud server via RDP
I have a google cloud server, I've been using it for months and I always connect to it by downloading the RDP file and it always worked.
But today I'm getting this error message when I try to connect....
google-compute-engine
1
vote
1answer
49 views
Having issues opening up a port for my instance on GCE
I'm running a GCE instance. I ran sudo ufw allow http && nc -l 80 and it succeeds, showing that 80 is open. However, when I try to open up a server by running waitress, a Python server, with ...
0
votes
0answers
21 views
lsof displays two connections from one port
I'm following lsof output for my process
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
AppName 79899 heximal 7u IPv4 0x6c18d5501d2e17c9 0t0 TCP 10.3.2.8:...
0
votes
0answers
22 views
Connection timout between two IP troubleshooting
I have a client with a webserver and a VPS server with a webserver and a mailserver. These machines have to exchange data via REST API but I have a problem, they are not reachable each other over HTTP ...
1
vote
2answers
167 views
Webmail via imap unix socket - good idea or not?
I'm slowly setting up an email system on a Centos 7 server. The particular software I'm using will consist of postfix, dovecot and roundcube, although my question isn't specific to them (I think).
I'...
0
votes
0answers
65 views
Nginx dynamically limit bandwidth per IP
I'm trying to set up a Nginx web server for serving file downloads.
Let's say that my server has the capability to upload at maximum 1Gbps, is there any way I could make Nginx spread the bandwidth ...
1
vote
0answers
142 views
Logstash losing connection to Elasticsearch nodes
We're running Logstash on a server which is pushing logs into an Elasticsearch cluster. In the Logstash logs we see it losing connection to the Elasticsearch servers with a connection reset error. We ...
0
votes
1answer
103 views
PostgreSQL trust connection with QGIS
I've setup a local postgresql database, and as it's a local database, I'm not worried about security or authentication. I'm currently using this database with QGis and PostGIS to store geometry data. ...
0
votes
1answer
23 views
How can I count the time spent in a day in establishing connections between two servers?
I have two servers, one is a SQL Server and the other one is a webserver with IIS installed.
I'd need to find a -weird, admittedly- information: how much time the webserver spend during a day, in ...
0
votes
1answer
40 views
nameserver doesn't work stable
I've recently bought 2 domains from namesilo. I'm using a VPS on AWS.
https://duman.digital and https://dumandigital.com
Both are using the same nameservers, same settings, however dumandigital.com ...
0
votes
0answers
145 views
503 Service Temporarily Unavailable AWS
I followed this tutorial https://medium.com/@remy.dewolf/aws-fargate-first-hands-on-experience-and-review-1b52fca2148e but in the end when I copy-paste the DNS name I get that the service is ...
0
votes
2answers
1k views
Cannot establish VPN connection in Azure
Today started to get this message:
The connection was prevented because of a policy configured on your RAS/VPN server. Specifically, the authentication method used by the server to verify your ...
0
votes
1answer
36 views
Windows Server 2011 - System opening ominous TCP connections
Where I work we have a Windows Server 2011 Small Business edition, and recently our Symantec software started reporting "blocked intrusion attempts" from port 80. Our routers do not forward any port ...
-3
votes
2answers
500 views
After Windows 10 update 1803, network fails randomly
We have a network with 4 servers and several clients with W10.
The server's OS versions are:
W10 Enterprise: 10.0.17134.137
W10 Pro: 10.0.17134.165
W10 Enterprise: 10.0.17134.165
W10 Pro: 10.0....
-1
votes
2answers
52 views
how to get file download connections on linux
I have a site with video content (mp4 files).
When people are watching videos, they are downloading video files from my site. I want to know the number of the active connections via the linux ...
0
votes
1answer
91 views
Nginx shows 15k active connections, few are reading/writing/waiting - what are they doing?
Currently using NGINX as a load balancer for an upstream to a sharded mongo cluster.
.conf reads:
stream {
upstream prodapp_mongo {
least_conn;
server xxx.xxx.xxx.xxx:27017;
...
0
votes
1answer
26 views
I get a ERR_CONNECTION_TIMED_OUT for the web and cant connect via SSH to a server
Was in the middle of working on a website on a linode server when suddenly it went offline. Trying to connect via the web I get:
This site can’t be reached
xxxxx.com took too long to respond.
...
0
votes
0answers
250 views
Connecting to MongoDB Atlas throws Exception 'No suitable servers found'
Connecting to the mongodb atlas and trying to write a simple document gives the following error. What am I doing wrong?
$manager = new MongoDB\Driver\Manager("mongodb://admin:admin@test-shard-00-00-...
0
votes
1answer
515 views
cassandra port is closed
I am trying to connect to a cassandra installation from a remote machine. Cassandra is running the thrift service on 9160 which is the default port. But I cannot connect the DB and I always get ...
0
votes
1answer
45 views
Trouble connecting to a remote server using SSH
I am able to connect to git@github.com using ssh. My key matches the key stored in the server.
However I am trying to connect to a private repo git@privaterepo.com that blocks non allowed IPs and I ...
0
votes
0answers
17 views
Lost requests between linux servers (¿SSL maybe?)
I'm having a headache with that:
I've two landing pages in 2 different domains in a "Server A". One landing page with HTTPS and another one without it.
Both landing pages have a file named "tracker....
0
votes
0answers
26 views
Debugging connectivity issue to a website
How can we debug the connectivity issues to a website https://test.mysite.office.net? From public networks, this URL is accessible.
From our network we are not able to access it. But Ping works fine, ...
0
votes
0answers
103 views
I can ping only some websites. At my wits end
I have a really strage phenomenon in one of our data centers.
I can ping facebook.com, yahoo.com, deb.nodesource.com and a few others (DNS resolution works fine).
But I can't ping google.com, archive....
0
votes
0answers
407 views
Tomcat not accepting connections, Apache using up all available workers
We run two separate tomcat-servers (tomcat 7) behind a load-balancer and an Apache (v. 2.2) working as proxy (on the same host). Every server runs about 70 microservices which are accessed from a ...
0
votes
2answers
89 views
Verify network providers
The hosting company is telling us that their network is multi-homed, a blend of multiple bandwidth providers (level3, att, cogent...)
Is there any way we can test / verify their claim?
we want to ...
1
vote
1answer
103 views
HAProxy-Apache encrypt connection
I have haproxy_server and apache_server in different datacenters, what is the best way to have encrypt connection between them?
It’s working with the certbotand with the following configuration:
...
0
votes
1answer
42 views
How to connect to my desktop from Linux debian Azure VM,
I have a license server on a local desktop computer in my office; I should be able to connect to it thanks to its ip-adress and port. But it does not work.
To understand why, I tried running command:
...
0
votes
1answer
405 views
RST packet and server behavior
If a client send one RST packet to a server, how will the server react?
Client ----RST----> Server
Does the server close the connexion immediatly or does it wait for another packet to be received?
...
1
vote
1answer
37 views
Internet host is not accessible with VPN connected
I've connected to my work VPN via KerioControl VPN Client. Everything was OK until today I've experienced connectivity issue with internet host:
ping api.nuget.org
Pinging cs9.wpc.v0cdn.net [72.21....
3
votes
2answers
545 views
telnet non interactive: connection closed by foreign host
if I do
telnet host_ip port < /dev/null
Trying host_ip...
Connected to host_ip.
Escape character is '^]'.
Connection closed by foreign host.
By checking the wireshark, the client side sends tcp ...
0
votes
1answer
64 views
Connect 3 L2 switches to router
I own:
3 switches (layer 2, managed, 24 ports) model Zyxel GS1920-24HP
1 router model Zyxel USG 310
My network is segmented into 10 VLANs (1, 2, 3, 4, 5, 6, 7, 8, 10, 11), the central router ...
0
votes
1answer
192 views
iptables block traffic on 443 port without connection timeout
I have a pc 192.168.1.10 and I want to block traffic to port 443 from the lan to it.
Now I am just using:
iptables -A INPUT -p tcp -s 192.168.1.0/24 --dport 443 -j REJECT
the problem is that if I ...
1
vote
0answers
2k views
AWS: ssh_exchange_identification: read: Connection reset by peer
I am facing "ssh_exchange_identification: read: Connection reset by peer" error.
I am not able to ssh my instance.
Any help is highly appreciated. Thank you.
Below is the debug information
ssh -i ~/....
5
votes
2answers
473 views
random CONNECTION_RESET on apache2.4 debian 9
My server has some strange behaviour and I just cant find the cause. I've been looking everywhere.
I will pay 200$ worth of bitcoin to anyone who can figure this out.
The problem:
When requesting ...
0
votes
1answer
93 views
weird netstat output on netscaler
We have a VPX-1000 netscaler. When traffic suddenly increases our website goes offline and doesn't response to requests but our netscaler load is fine (cpu %40 ram %50 4 cores 4gb). After incident ...
0
votes
1answer
61 views
Random connection resets between browser and Linux server - MTU wrong or ICMP not getting through?
I've been seeing random ERR_CONNECTION_RESET errors in my browser (Chrome, Firefox or Edge running on different machines, Windows 10 1709) when I try to edit web pages on a remote Linux server running ...
0
votes
1answer
175 views
Unable to SSH/Ping but can FTP/Connect to Apache [closed]
I've gone away for a couple of days and left my machine running at home. I was doing some stuff on it over ssh just before I left and it was working fine. I got to the hotel and connected to the wifi, ...
2
votes
0answers
779 views
SSH server connects, but does not open a shell session
I have a server, where I can login using SSH, but do not get a shell (anymore). What can I do to login to a minimal shell to debug the issue? Here is the log of ssh -vvvv
debug1: ...
1
vote
0answers
770 views
HTTP request works on browser, fails on everything else
What am I doing
Two NodeJS/HTTP servers running on ports 3000 and 3001
Using Nginx to proxy requests
app.localhost -> localhost:3001
api.app.localhost -> localhost:3000
What's wrong
...
1
vote
3answers
98 views
Loss of connection when connected via switch
we've currently set up 7 ubuntu machines connected to a switch and that switch to a router-modem, router has dchp configured to bind each machines specific Mac address to an ip (in essence static IP ...
0
votes
2answers
600 views
DHCP server problems with static IP clients
lately I've been having some problems with my DHCP and my clients IP.
So basically, in my netwrok I have a DHCP server (Windows 2012 R2) which is working fine (when you connect to the network you get ...
2
votes
0answers
715 views
Debian 8 - TCP Overflows / TCP Drops
I have recently installed netdata on my Debian 8 server (monitoring software) and afetr installing my Debian 8 server is reporting the below two alerts constantly.
1m ipv4 tcp listen overflows = 37 ...
1
vote
0answers
60 views
Parts of Synology down or a local issue?
I have a Synology NAS DS214+ appliance, which lately has started working wierdly.
I started looking into this, after seeing problem with Synology Package Center, same as in this question: Impossible ...
