Questions tagged [loopback]

This tag is for questions about loopback interfaces on network devices. For instance, you want to configure routing on your layer 3 switch and for that you want to configure a loopback interface.

16 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
1answer
306 views

Microphone loopback on Linux

I am trying to do simple microphone loopback to immediately play to the speakers. I eventually got it working on one computer by running pacmd load-module module-loopback latency_msec=1. However, a ...
1
vote
0answers
213 views

Does the loopback network inside the docker container shares host network loopback?

I recently faced issue with one client application which is running inside a container. This client making network connections to a server residing in the same container over loopback IP 127.0.0.1. ...
1
vote
0answers
77 views

retransmissions/out-of-order packets with large (~1 MB) writes/reads w/ TCP (SOCK_STREAM) over localhost loopback — ACK lost

I'm seeing retransmissions/out-of-order packets when using the loopback interface and have been googling for days to try to determine if I should be surprised by this (which I am) or if anyone else is ...
1
vote
0answers
95 views

IPv6: Why ping to another IPv6 host doesn't work when loopback interface is DOWN

While it is said the only job of lo interface is to test its own connectivity, why doesn't pinging another IPv6 host work when the lo interface is made DOWN. Network configuration: host1(eth0) - ...
1
vote
0answers
133 views

Alsa snd-aloop: add more loopback subdevices?

I'm currently working on a project on which I need to create multiple audio streams using snd-aloop. The issue is that we reach the max number of substreams easily. Is it possible to have more than 8 ...
1
vote
0answers
53 views

New loopback device module does not show trace in wireshark

I am trying to write a network device driver that can duplicate the functionality of the loopback device. I modified the code available at the link. I am testing on Linux 4.8. I removed code related ...
1
vote
1answer
170 views

Linux audio loopback: Multichannel to stereo (for OBS usage)

I am using the RME Fireface 802 to record a stereo signal for my stream, but unfortunatly OBS won't accept Multichannel audio that contains more than 8 signals. So, since OBS doesn't like my ...
1
vote
0answers
361 views

Trying to make loopback device as Alsa-to-Jack bridge

Using this guide i trying to make loopback device as Alsa-to-Jack bridge. Everything fine until those lines # capture client alsa_in -j cloop -dcloop # playback client alsa_out -j ploop -dploop On ...
1
vote
1answer
3k views

ip6tables - IPv6 DNAT to localhost

I have the following IPv4 rules: iptables -t nat -A PREROUTING -d "server ipv4" -p tcp -m tcp --dport 80 -i eth0 - j DNAT --to-destination 127.0.0.1:55555 iptables -P INPUT ACCEPT In addition, I ...
0
votes
2answers
158 views

redirect external request to localhost with iptables

I have a service running on "localhost" address on a certain X port. Unfortunately, I can't change the address to "0.0.0.0" to expose that service. Can I use iptables to internally redirect request ...
0
votes
1answer
13 views

How Can I Route A WAN IP Request To My Loopback Address And Port?

I have two virtual machines on my laptop. One of virtual machines want to reach an IP address (I have the IP) and I want to route this request to another virtual machine's port. I changed the default ...
0
votes
0answers
18 views

loopback plug detection on linux

I try to find a way to detect a loopback plug on a embedded linux device. The goal is to detect the looback plug at startup and to do some actions. Do you know how can I detect the presence of a ...
0
votes
0answers
483 views

ALSA Loopback not recording system audio on Xubuntu 18.04 in ffmpeg command

I have an ffmpeg script to do my screencasts. I have Debian 9 at the office and Xubuntu 18.04 at home. On those two operating systems, the following works to record system audio and from my microphone....
0
votes
1answer
81 views

Reachability of custom loopback interface on different machine

I have a loopback interface on one machine with a certain IP address, and on another machine I have a static route to that loopback interface subnet. I can ping the other loopback interface when ...
0
votes
1answer
483 views

Is it possible to boot a grub-mkstandalone created img file from cfg?

So I have a fully functional .img file created using grub-mkstandalone. I put this on a CD and it boots fine, the ISO loads great in a VM, etc... Now, what I want to do is link an existing grub.cfg ...
0
votes
1answer
27 views

ipv6 route slightly modified

I am running GNU/Linux version 3.4.113+ with a 6in4 tunnel to a tunnel broker. If I run command ip -6 route list table local I see a lot of routes. And one of this route entries is this local ::1 ...