Questions tagged [connectivity]

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Ethernet connection unmanaged

I am using elementaryOS 5.1.7 Hera and I suddenly don't have any ethernet connection. Network manager says it's unmanaged. I checked that /etc/NetworkManager/NetworkManager.conf has indeed managed=...
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5 views

firewall-cmd open port issue

I have CentOS 7.7. I try to open port 9001 by the command: firewall-cmd --zone=public --add-port=9001/tcp --permanent & firewall-cmd --reload' I can see the port in the command firewall-cmd --list-...
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15 views

Establish LTE-internet connectivity

I am trying to establish internet connectivity using a SIM card. Running the command nmcli radio shows WWAN to be enabled, however the command: nmcli device status returns: DEVICE TYPE STATE ...
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1answer
46 views

How can I test GRE packets connectivity?

If desiring to test TCP port 5900 to a remote host (say IP 111.222.111.222 ), I do : l$ nc -v 111.222.111.222 5901 Connection to localhost 5901 port [tcp/*] succeeded! RFB 003.008 As can be seen, ...
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1answer
72 views

Intermittent internet connection/DNS issues with Debian

For the last 15~20 days I've faced a inconsistent connection issues. I've tried several things, and mostly I can't say if they helped or not. What I can say for sure: When returning from hibernation, ...
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1answer
318 views

Bluetooth keeps changing from A2dp to headset and loses connection on Debian Buster with JBL 4 Speaker

since over a year I am having trouble with the bluetooth connection to my JBL 4 speaker. It looses connection again and again. I created a script according to what I found on the internet to reconnect ...
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1answer
25 views

Bizarre connectivity issue

I just got the most bizarre connectivity issue. WiFi connects and also cable. I can ping and even connect to a VPM (forticlient), but the browser can't reach any page. It throws "server not found" ...
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32 views

Interernet is not available in Browser

I am using Linux Mint 19.1. I am getting internet in Laptop but I am not getting internet in Browser. My laptop suddenly shut down after that I am not getting internet in my Browser.
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30 views

Make ssh client process end once the connection to server was lost!

I have a ssh process hanging around (i.e., does not exit and end). I can test that no connection with the sshd server exists anymore ss -t | grep [SERVERIP] yields no results. Additionally, being ...
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41 views

Connect docker-container with other container by unit-socket

I'am trying to connect to containers by unit-socket/ docker run -d -v /var/lib/docker/overlay/[container_id]/var/run/postgresql/.s.PGSQL.5432:/socket_volume/.s.PGSQL.5432 -p 50000:8080 my_repo/...
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77 views

Network connection fails repeatably on Linux

I've been trying to figure out what is happening on this public wifi. I've tried turning off NetworkManager's MAC changer, which did not help. For some reason on Linux it will not connect except like ...
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ssh session for Azure CentOS virtual machine keeps getting disconnected after only few seconds of inactivity

ssh session with PuTTY to an Azure CentOS virtual machine keeps getting disconnected after only few seconds of inactivity. Also i am running a self developed process that gets killed for no reason .. ...
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210 views

Bluetooth headphone problem - arch-linux

I am trying to pair my Sennheiser hd 4.50 to my Lenovo Thinkpad yoga s1 which runs on arch linux. I installed blueman to list all devices and then connect. I see some devices including one headset ...
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1answer
75 views

How to configure stderr from nc?

I would like to check port connections with nc and forward the result to a text file. stdout works fine. stderr is empty, if you don't use -v (which I dont want), so I would like to configure the ...
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1answer
516 views

No Link on WAN Port for TP-Link Archer C7 AC1750 v4 Running OpenWRT 18.06.4

Looking to upgrade from a working Linksys router running OpenWRT Kamikaze, I selected the TP-Link Archer C7 based on happy Reddit reviews of OpenWRT running smoothly on it. It seemed lucky to get the ...
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1answer
122 views

how do I tab in telnet when executing it on remote host by ssh?

How can I use tab when I use telnet on a remote host by ssh, I have something like: ssh -o StritHopstKeyChecking=no -p port user@hostA telnet hostB; echo "Reconnect?"; while read < /dev/tty; do ...
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2answers
4k views

(Ubuntu 18.04 LTS) Can't switch off Airplane mode with physical switch

I'm running Ubuntu 18.04 LTS on an MSI GS65 Stealth 8RE. When the laptop gets out of sleep mode, air plane mode is on and Linux says it must be deactivated via a physical switch. The FN+F10 ...
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1answer
691 views

Can't connect to Github from one PC, every other website works fine

Running Ubuntu 16.04, I can connect to other websites fine: ping google.com PING google.com (172.217.25.206) 56(84) bytes of data. 64 bytes from nrt12s13-in-f14.1e100.net (172.217.25.206): icmp_seq=1 ...
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783 views

USB-Ethernet adapter stops working periodically, as if going to sleep

My laptop uses a USB-Ethernet adapter for a wired connection. Periodically, while actively working, the connection is lost. NetworkManager tries to connect and to obtain an IP address via DHCP but ...
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1answer
3k views

Unable to telnet to a server

Here are 2 servers 192.168.0.12 192.168.0.21 there is a service running in 50070 port in server 192.168.0.12 when I do telnet from 192.168.0.21 server it fails: $telnet 192.168.0.12 50070 Trying ...
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1answer
1k views

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

I have a MacBook Pro that is not connecting to a Wifi Hotspot - namely, Google Starbucks. The problem is that the login page will not pop up when I connect to the network as it does with every other ...
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2answers
342 views

get pppd exit code - how?

I'm designing some reporting system on Raspberry Pi system which connects to world thru 3G usb modem controlled by pppd. 99,999% of time connection works ok, but sometimes it drops and further ...
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0answers
41 views

Change USB Port Health (Connectivity) Check Interval

Is there any way (in Linux) to change the interval that the system polls the USB ports for a health (connectivity) check? Or even turn off this check? Background: I have a small box that the devices ...
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0answers
358 views

Hadoop cluster not listening on port that I configured. What is wrong?

I set up a Hadoop cluster with RHEL 7.4 servers. There is no firewall between them. I am running Hadoop 3.0. On the namenode the core-site.xml file is configured to use port 54310. I run this ...
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0answers
578 views

The command “hdfs dfsadmin -report” fails because “failed to connect to server”

I am trying to configure a multi-node cluster of open source Hadoop. I have Hadoop 3.0 installed on the namenode and the data node. Both are running Linux (SUSE and Ubuntu). None are CentOS, RedHat ...
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1answer
772 views

znode not created in zookeeper

I use zookeeper and can't create znode . [root@server-1 bin]# sh zkCli.sh -server 127.0.0.1:2183 Connecting to 127.0.0.1:2183 Welcome to ZooKeeper! JLine support is enabled WATCHER:: WatchedEvent ...
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1answer
470 views

Repository error with yum

I cleaned yum (clean metadata, packages, all, etc...) and after that everytime I try to download or update or do something with yum I get the following error: http://"MY IP"/install/rocks-dist/...
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0answers
77 views

Connected, but no internet when resuming — works after reboot

I can connect to known networks, but do not have internet upon resuming (from suspension). The connection will be fine after a reboot. I am running Mint 18.2, kernel 4.10.0-35-generic. Edit: It is ...
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1answer
745 views

Can I force a second “Network Login” (captive portal) prompt from GNOME Shell?

I am running GNOME Shell and I have installed network-manager-connectivity-debian. When I first connect to a WiFi hotspot a "Network Login" window opens (a chromeless browser), and I can enter my ...
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1answer
6k views

reconnect to disconnected putty session or connect to idle session in linux

I need to reconnecting the putty session, I will tell you one example, I'm installing the python manually in my centos os machine, while I run command make, phyton is compiling to makefile suddenly I ...
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1answer
182 views

Certain HTTPS web sites do not load from KVM virtual machine over IPv6

This is driving me crazy as I cannot load certain HTTPS web sites only from KVM virtual machines and only over IPv6. IPv4 works fine. IPv6 connectivity works for the same websites from the hypervisor. ...
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1answer
412 views

How to create a configuration to only connect to WiFi if signal is ≥ 30 %?

Is there any chance to create a configuration that does the following job? Only connect to available WiFi if it's signal is stronger than 30 % At many places, I stay in the border area of barely ...
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2answers
833 views

Cannot access the captive portal in FreeBSD 12-CURRENT

Problem I'm trying to connect to an open WiFi with a machine running FreeBSD 12-CURRENT. Normally, I run wifi-start.sh (see below) whenever I want to connect to the Internet. It works with WPA ...
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0answers
101 views

Internet connectivity lost every 10-15 minutes (ethernet cable)

I'm using Ubuntu 16.04, and I connect to my router using a LAN cable. The connection interface is called enp2s0. The router gives IP through DHCP to me. Everything works fine, for 10-15 minutes, and ...
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1answer
4k views

Broadcom BCM4352 : Bluetooth does not connect

Why does Blutooth not connect? The Bluetooth unit can find, but not connect to other devices on Debian Testing (9.0 Stretch). Bluetooth works well with a different Operating System. BIOS settings ...
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0answers
476 views

Cannot connect to FreeBSD server behind a router

I have a FreeBSD 9.3 installation inside the 192.168.2.x LAN2 which is connected to the 192.168.1.x LAN1 (router WAN IP is 192.168.1.10). This BSD runs SSH and FTP services. I can use both services ...
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1answer
220 views

SSH connection through VPNC drops as soon as I print data more than 100 bytes to the screen.

I have a vpnc connection with default configs: IPSec gateway www.example.com IPSec ID test IPSec secret test Xauth username foo Xauth password bar I use sudo vpnc and it connects fine. When I SSH ...
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0answers
186 views

Telnet connect to non-existing adress

I'm having unexpected behavior using the telnet command on various linux (Linux Mint, Ubuntu server). When trying to connect to a non-existent device, it succeed. I tested with 1.2.3.4 which is not a ...
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1answer
443 views

How can I use VPN for incoming connections and direct line for outgoing connections?

My ISP uses a Carrier Grade NAT (a switch inbetween ISP line and my primary router) and that doesn't allow me to do portforwarding (I have set it up but to no use). After much contemplation, I have ...
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3answers
191 views

Traceroute - approach the place with connectivity issues

I'm using the traceroute utility to test network connectivity. The problem is usually with slow speed - that means, the webpages in the browser are often displayed very slowly. Sometimes the speed of ...