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Questions tagged [loopback]

The tag has no usage guidance.

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0answers
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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
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1answer
34 views

Does `lo` have no MAC address?

From https://networkengineering.stackexchange.com/questions/57935/is-a-network-interface-supposed-to-have-no-more-than-one-mac-address/57937?noredirect=1#comment100988_57937 A network interface in ...
7
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4answers
837 views

why `nmap 192.168.1.97` returns less services than `nmap 127.0.0.1`? [duplicate]

According to https://networkengineering.stackexchange.com/a/57909/, a packet sent to 192.168.1.97 "doesn't leave the host but is treated like a packet received from the network, addressed to 192.168.1....
4
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1answer
101 views

How come one can successfully ping 127.0.0.2 on Linux?

On a FreeBSD system with a loopback network interface … % ifconfig lo0 lo0 link up loopback drv_running running multicast nd6 performnud auto_linklocal no_radr link rxcsum ...
0
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2answers
97 views

What does the action “loop back” mean? [closed]

I have some difficulty to picture a diagram for the meaning of loopback. https://en.wikipedia.org/wiki/Loopback#Virtual_loopback_interface Any traffic that a computer program sends to a loopback IP ...
0
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2answers
100 views

Are the IPv4 and IPv6 networks for my loopback interface the same network?

In output of ifconfig: lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen ...
1
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2answers
87 views

Why is some virtual network interface assigned private IP address, while some is assigned loopback IP address?

Are docker0, lo and virbr0 are virtual network interfaces? Why are docker0 and virbr0 assigned private not loopback IP address? If private IP address can work like a loopback address, can lo be ...
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0answers
39 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 ...
0
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1answer
21 views

Does “loopback” in a loopback file mean the same as in loopback IP address?

man pvcreate says pvcreate initializes a PV so that it is recognized as belonging to LVM, and allows the PV to be used in a VG. A PV can be a disk partition, whole disk, meta device, or loopback ...
0
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4answers
182 views

How can I do a loopback test?

Book Computer Networks says all addresses of the form 127.xx.yy.zz are reserved for loopback testing. Packets sent to that address are not put out onto the wire; they are processed locally and ...
0
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1answer
86 views

Is it possible to zero the free space on a LUKS volume?

I want to have a LUKS volume as a loopback device pointing at a sparse file. Lets say I put a 20gb file on it, then later I delete it. How can I zero that area on the device itself so I can fallocate -...
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0answers
42 views

Setup loopback graphdriver devices in a XEN vm

I use a Xen Debian 9 host. there are no loopback devices in my vm: # losetup -f losetup: cannot find an unused loop device: No such device When I try to install docker-ci this fails with the error ...
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0answers
24 views

Iptables DNAT blocking firewall host

I have a machine where I manage the firewall using UFW. I have setup a few DNAT rules. It works well from the network but not at all from the server itself: Server IP: inet 10.0.4.4/23 brd 10.0.5....
0
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1answer
229 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 ...
-1
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1answer
66 views

default network on surface pro 4 is loopback

please look at this amin@amin-Surface-Pro-4 ~ $ ssh 192.168.1.10 -p 1366 ssh: connect to host 192.168.1.10 port 1366: No route to host amin@amin-Surface-Pro-4 ~ $ ifconfig lo Link encap:Local ...
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0answers
101 views

How do I set up a video loopback for recording my screen in X11 debian?

I am using LXDE on Debian Stretch and wish to record my screen using VLC media player. How do I set up the screen:// MRL capture device? Below is my attempt when assuming that I already had the ...
0
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1answer
25 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 ...
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0answers
1k 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 ...
6
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4answers
3k views

Is it possible to put a real IP on a loopback device?

Is it possible to put a real IP (not in the 127.x.x.x) range on a loopback device?
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2answers
505 views

OpenBSD: Defining a new loopback interface

I need one more loopback interface in my OpenBSD 6.1, with the IP address 127.0.0.2. I can create it by hand with the command: ifconfig lo1 127.0.0.2 And to have it at boot time, I just inserted ...