Questions tagged [networking]
Managing and using network connectivity on a unix system
0
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0answers
8 views
How do I get WiFi to work on Linux Mint 18.3?
I've been having issues with WiFi connectivity for a while, but lately it's gotten so bad that I must use a cable if I want stable internet. When I click on the network button on the toolbar (or go ...
-1
votes
0answers
8 views
Linux with two network connections as VirutalBox VM host: Can I exclusively route VM traffic over one device?
I am trying to do something admittedly a bit exotic: I have a Linux box with VirtualBox on it. This Linux box has an integrated network card and a USB WiFi device. In order to test a few things, I'd ...
1
vote
1answer
25 views
Checking if SCTP clients disconnected from SCTP endpoint
I want to properly check if an SCTP client disconnected and try to
I want to enable SCTP_STATUS for an SCTP endpoint(i.e. SOCK_SEQPACKET), but I dont seem to be able to set that like explained here ...
0
votes
1answer
14 views
wired outputs in nethogs [on hold]
I have sometimes wired outputs in nethogs stats:
? root 192.168.1.100:42608-81.21.119.76:18725
or
? root unknown TCP
there is always 192.168.1.100 (my PC address in network) and then "...
1
vote
0answers
11 views
connect LKVM vms over bridge
I'm using lightweight VM lkvm which creates tun interfaces on the host. Now I want to connect two instances of lkvm over bridge interface, similar to what other VMs do:
VM1 ...
2
votes
0answers
17 views
Ping to an active directory domain of 4 servers only ever pings one ip address
We have a domain with 4 ad servers. When I run ping domain it always pings the same address and never the other three. Absolutely never. If I run host domain the four ip addresses are returned in ...
0
votes
0answers
7 views
How to use “netatalk” to share files between my Mac and AWS EC2?
When I use the ubuntu machine at the office, a very nice feature is that I can share files in my finder just by drag & drop between my laptop and the ubuntu machine. But it doesn't work when I try ...
-6
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0answers
23 views
Need a shell Script in Linux to telnet all ports and get the status of each port [on hold]
Need a shell script in Linux to telnet all ports and get the status of each port. I have to check for about 300+ IP's
-1
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0answers
13 views
How does Linux actually perform protocol data unit (PDU) encapsulation?
I understand that as data goes from the upper layers (Application Layer) to the lower layers (Physical/Link Layer(s)), the data is encapsulated. When it goes back up the layers, it is decapsulated.
...
0
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0answers
14 views
Run pppd with custom MAC address?
I want to run multiple PPPoE accounts on my Linux machine but unfortunately, each PPPoE account requires a different MAC address and my machine only has 1 Ethernet interface (buy another adapter is ...
0
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0answers
19 views
Connection Refused on Ubuntu 18.10 [on hold]
I'm using Ubuntu and i just installed the 18.10 version as a dual boot with windows. My problem is that when i try to connect to certain websites likes my university's mail, i get a connection refused ...
1
vote
1answer
34 views
How to add a static route in systemd-networkd?
I have a host which is on 192.168.0.0/24 with an IP of 192.168.0.13. Its DHCP-provided gateway is 192.168.0.254.
The configuration is done via systemd-networkd and the issue below is present at ...
0
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0answers
11 views
How to filter domains on a transparent network bridge?
How can you filter traffic on a transparent network bridge?
With iptables it is possible to some extend but most of the time a proxy is recommended or alternatively something like pi-hole or dnsmasq ...
1
vote
2answers
33 views
How to track which process is generating network traffic?
After fresh system install (opensuse Tumbleweed) I have observed strange activity on network monitor - some app is generating small network traffic (sending and receiving data)... how to track which ...
0
votes
0answers
11 views
Tcp TCPBacklogDrop and packets pruned from receive queue
I am analyzing two virtual machines in the same LAN, tcp packet loss problem, but the knowledge has been exhausted.
platform
CentOS Linux release 7.2.1511 (Core)
3.10.0-327.el7.x86_64 #1 SMP Thu Nov ...
3
votes
2answers
34 views
Why does my NAT setup only work properly from time to time?
Homework assignment...
There are 3 computers in a local network: 192.168.0.185 (the 'client'), 192.168.0.129 (the 'gateway') and 192.168.0.81 (the 'server'). The 'server' is running a HTTP server, so ...
1
vote
1answer
32 views
TFTP timeout problem during PXE boot
While setting up a PXE boot server on a CentOS 7 machine, I encountered a strange problem with TFTP. I cannot retrieve any files from the TFTP server without encountering a timeout problem. The boot ...
0
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0answers
47 views
lxc container has internet access, how to access internet from host
I have a requirement that networking has to be managed by lxc container, so the Ethernet interface(eth0, which is the source of internet) is assigned to container.
I am able to ping "8.8.8.8" from ...
0
votes
0answers
27 views
Configuring network adapter in linux guest
I am using Windows host and ubuntu guest via Virtualbox. I have 2 network adapters configured. Both are bridged. The first one is bridged to my wifi network adapter and the second one is bridged to my ...
-1
votes
1answer
50 views
tar with ssh: what happens if creation speed is higher than network speed?
I'm concerned what will happen if speed of source read + stream create operations gets higher than underlying network protocol speed?
Is tar going to create and cache data locally before it is ...
0
votes
1answer
19 views
Cannot connect to wireless wifi and cannot manually install drivers
I've been trying to set up SparkyLinux for the past hours, and I can't seem to get the internet connection working. I'm dual booting it on a USB through my Mac, and it seems that the drivers for my ...
0
votes
1answer
34 views
How to setup DNS manually on Linux?
In Linux /etc/resolv.conf get often overwritten when we setup the DNS, because of the multitude of programs managing the DNS servers.
How to properly setup the DNS ?
0
votes
1answer
19 views
Static Routes between Multiple Subnets - ROUTER (WAN) + WiFi Mesh ROUTER
I've got a standard router (192.168.1.1) that is connected to the internet. It also has the following connected to it:
an un-managed switch which all wired devices connect to.
a Tenda Mesh WiFi ...
0
votes
0answers
49 views
using two or more network interface in linux (ubuntu) [on hold]
I have two or more network interface at the same time and want to use each network for sending special requests over it
for example :
I want to see a video by "network-1" and other requests I ...
0
votes
0answers
29 views
Using multiple wireless usb adapters (Huawei E3372) with the same mac address
If I connect two usb wireless adaptors (via a usb hub), only one of them gets assigned an ip address.
I want each to be assigned a different ip address to be able to use both wireless adapters at the ...
3
votes
1answer
191 views
Why does Internet access stop if I change the IP address of a wireless USB adapter?
I have a USB wireless adapter which is eth1. When it is plugged in it automatically gets an IP address of 192.168.8.100/24 and routes automatically added:
ip a output:
39: eth1: <BROADCAST,...
4
votes
1answer
26 views
Is there a file that associates a thread to its network namespace?
/proc/[pid]/ns/net contains a link to the inode representing the network namespace of the process with PID [pid]. Is there something similar for threads?
My use case is a multi-threaded application, ...
1
vote
0answers
39 views
Issue using openvpn on Debian [closed]
I am using openvpn. I can connect to the server as a client without hiccups but I can't use the internet. Here's how the config file looks like on the server:
**The server is a Raspberry Pi in my ...
1
vote
2answers
30 views
Why does Asterisk open a second media port +1 above the other?
When placing a call through an Asterisk SIP server, the server will open 2 ports for every media channel:
2 ports for call leg 1 video
2 ports for call leg 2 video
2 ports for call leg 1 audio
2 ...
1
vote
1answer
29 views
Pi Hole DNS not working after configuring Wireless Access Point on Arch Linux in Bridge Mode on Raspberry Pi
I'm experimenting with a Raspberry Pi 3 Model B (running arch linux) and its WLAN module.
Until today I had Pi Hole running on it for my entire network.
The Pi stands where we have very poor Wifi ...
1
vote
0answers
12 views
Access usb wireless adapter from network namespace
I have a wireless usb adapter and I would like my docker container to use just this for the internet (not the computers own wireless adapter). I think I can do this if I know how to access the adapter ...
0
votes
1answer
15 views
Routing traffic from Windows to device on debian linux
I'm wondering if I have all the networking set up correctly for my situation on the debian computer.
I have set up a pelora CL-TEN frame grabber and JAI camera on my Debian 9.5 (stretch) server.
The ...
2
votes
1answer
66 views
How to connect to ethernet while installing arch linux?
I am trying to install arch-linux on my thinkpad following the installation wiki. I plugged in the ethernet cable, and the ip link command will show:
enp8s0: <BROADCAST,MULTICAST,UP,LOWER_UP> ...
0
votes
0answers
50 views
Mint 19.1 Wifi Not Working
I just installed Mint 19.1 on a Lenovo Thinkpad 11e and, while everything else seems to be working well (except for one irrelevant issue), I can't get it to connect to Wi-Fi. No networks even appear, ...
-2
votes
0answers
39 views
Files in /home disappeared after installing Packet Tracer [duplicate]
I was installing packet tracer on my kali machine and I extracted the packet tracer in/home and I was trying to install it in /home and suddenly I checked all the files in /home disappeared. I've ...
0
votes
0answers
19 views
Temporary failure resolving `mirror.fsmg.org.nz` when updating kali [duplicate]
apt update
0% [Connecting to mirror.fsmg.org.nz]
Err:1 http://mirror.fsmg.org.nz/kali kali-rolling InRelease
Temporary failure resolving 'mirror.fsmg.org.nz'
Reading package lists... Done
Building ...
0
votes
0answers
14 views
Getent Hosts For Port 1915/tcp -iptables
I have a scenario: i will have to protect my network from unsolicited access from my DMZ machine, configure node-A to allow new connections on port 1915/tcp from hosts (obtained by 'getent hosts node-...
0
votes
1answer
20 views
Block or drop DNS requests within forwarded packets
I have a default Debian 9 installed in minipc, which is forwarding packets further.
I wish to be able to block hosts via domains, means if any forwarded packet of DNS type has request for example of ...
0
votes
0answers
15 views
measuring ppp traffic with ifstat
I've established a ppp link with 2 Linux machines. The speed is set to 9600. Traffic is going one way, i.e. from Machine 1 to Machine 2. However when I run ifstat -btwTWS -i ppp0 on Machine 2, I'm ...
3
votes
1answer
28 views
ip-rule doesn't work with ToS greater than 0x10
There is some weird behavior of ip-rule with specific IP ToS-values. It works fine just with values up to 0x10, but doesn't accept DSCP-part.
I tried:
ip ru a tos 0x20 table 1234
And got:
...
1
vote
1answer
17 views
3proxy via pptp-linux VPN
Good day. I have a situation: a computer with debian (K) is connected to the router (A), which distributes the network 192.168.1.0/24. There is another router (B) (it has a “white” ip), which ...
0
votes
1answer
35 views
Instagram did not return a 200 [closed]
I have an issue with WordPress Plugin for Instagram.
When I use IPv6 it said:
Instagram did not return a 200
But if I switch to IPv4 it worked correctly.
So Is there a way to keep ipv6 but ...
0
votes
1answer
10 views
Source for outgoing connection in nethogs
I see several outgoing connections in nethogs (please see screenshot below), where my server is connected e.g. via its port 445 (samba?) to someone else.
However, ss does not show any process running/...
-1
votes
0answers
21 views
Access denied when accessing samba shares via a network drive in Windows 7 and 10
I have a Debian Stretch server setup for a few years now, with samba install with shares configured the shares are accessible from both windows 7 and 10 computers when using the network paths directly....
0
votes
0answers
18 views
Knockd disabled but it still intercepts packets [closed]
I set up knockd on latest Debian stable to enable pretty knocking but it didn't work reliably so I settled on doing it myself using just iptables.
However, I couldn't get that to work using the exact ...
0
votes
0answers
12 views
Unable to find any visible networks in Kali Linux (VirtualBox). Tried multiple solutions. How do I solve this? [duplicate]
I have Kali Linux installed from offensive security site. The virtualbox image was downloaded. It initially said that no wireless adapter found. I used compact-wireless-2010-06-26 to solve that. Now, ...
1
vote
0answers
17 views
Unable to add default route via VPN (openvpn)
Initially my routing table looks like this
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG ...
1
vote
0answers
16 views
Routing Issue concerning VPN Gateway
I am using a raspberry with the newest stretch version and facing a routing issue. My network:
LAN: 192.168.178.0/24
Subnet Mask 255.255.255.0
Default eth0 Gateway 192.168.178.1 (this network is ...
2
votes
0answers
42 views
Why would NFS have lag after a minute of inactivity?
I am running a version 4 NFS server on a Salix server with kernel 3.10.17. I am mounting the NFS share with the command
sudo mount -t nfs 10.0.0.150:/share /mountpoint
on my client machine, which is ...
1
vote
2answers
31 views
How to check if a packet reached an interface in a multi-interface context?
Consider the following topology:
I am sending ICMP (ping) packets from host B to 10.0.1.1. They reach the target and the target answers with a reply. The connectivity works fine.
When running, on ...
