Questions tagged [socat]
The socat tag has no usage guidance.
64
questions
59
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What's the difference between socat and netcat?
I understand that socat is described as a "more advanced" version of netcat, but what is the actual difference?
Would it be correct to say that everything you can do in netcat you can also do in ...
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44
votes
7
answers
51k
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Forward local port or socket file to remote socket file
Quick question - I run two linux boxes, one my own desktop and the other my VPS. For security reasons on the VPS end I opted for socket connections to MySQL (/var/run/mysqld/mysql.sock). I know I can ...
user32616
31
votes
6
answers
73k
views
echo server with netcat or socat
I want a UDP echo server to get packets, and reply exactly what it has received. How can I simply do this using netcat or socat? It should stay alive forever and handle packets coming from several ...
11
votes
2
answers
3k
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How to set up a persistent TCP gender-changer proxy?
I have a provider (A) that wants to send us data through an incoming TCP connection. Unfortunately the consuming service (B) cannot receive inbound TCP connections. Also it does not have a static IP, ...
- 633
10
votes
1
answer
18k
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socat: Show incoming connections
I am slightly going mad. Even if I call socat like this:
socat -vvvv tcp4-listen:9000 tcp4-listen:9001
it works perfectly, but doesn't inform me about incoming TCP connections! Is there an ...
- 214
8
votes
2
answers
7k
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Access D-Bus remotely using socat
Description:
I'd like to access a D-Bus system service from another machine, knowing only machine's IP address and the service to connect to.
What I have recently found is Gabriel (D-Bus over SSH). ...
- 261
7
votes
2
answers
12k
views
socat forwarding to multiple addresses
I have a single incoming video stream, and I'd like to set up multiple processes to handle it, each running at its own address. After some reading it seems socat is one way to do this
socat TCP4-...
- 173
7
votes
1
answer
11k
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Always keep socat alive
I have a socat running nicely, executing my command when a connection comes in with the arguments provided. However, the issue I am having is that the socket is at EOF and the next time a connection ...
- 193
7
votes
1
answer
41k
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How do i use socat as a proxy server?
I'd like my .NET app to use a proxy which I know how to do except .net doesn't support sock4a/sock5. I know how to setup my app but, how do I setup socat to listen at as a TCP proxy on port 1234 and ...
user274
7
votes
2
answers
6k
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Forwarding serial port over network and back to serial char device on remote host (socat?)
I'm working with a linux application which needs to talk with a remotely-located serial (rs-232) device. I've worked out how to use socat on the remote end to send the device's serial data over an IP ...
- 386
7
votes
1
answer
17k
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Forwarding linux terminal from serial port to TCP with socat
I'm working on embedded ARM platform, Slackware. I'm using G24 Java modem which is configured to forward data between ports /dev/ttyS1 and /dev/ttyACM0, so anything that goes onto any of these ports ...
- 211
7
votes
1
answer
8k
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Socat to share a serial link between multiple processes
I have a scenario where multiple processes on the same box want to communicate with a serial device. Process A needs two-way communications with the serial port, and Process B only needs to be able ...
- 191
6
votes
2
answers
19k
views
Windows/Linux socat to share a serial device over IP
I have a scenario where I demonstrated to my group @ work how to share a very expensive USB patient simulator plugged into a Raspberry Pi (Debian) using socat. The group wants to be able to have an on-...
- 61
4
votes
2
answers
9k
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socat connect-connect "proxy" two inbound TCP connections to expose a firewalled service?
I'm struggling a bit trying to see how to use socat (or a similar TCP port redirector) to expose a firewalled service on a PC.
Here's the scenario: I have a server PC which will be acting as a ...
- 276
4
votes
3
answers
6k
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socat TCP file server
I'm trying to set up a simple socat fileserver using TCP to send small files (~100KB).
Here are the one-line servers and client for one file:
Server: socat -u -d -d OPEN:file.dat TCP-LISTEN:<port&...
- 126
4
votes
1
answer
2k
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Can socat be used to forward an ssh-agent socket into a chroot?
I'm building custom Debian environments on a remote server, which I connect to over SSH. This involves building a debootstrap environment, then chrooting into it to run a custom installer. As part of ...
3
votes
1
answer
2k
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socat tun device very low throughput
I was tinkering around with socat and tried to use socat for creating a TUN device for tunneling between two debian stretch servers. However, throughput seemed very low and comparing with iperf ...
2
votes
1
answer
3k
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Socat - is it possible?
Is there any way to listen and execute a command ( for every connection ) while port forwarding with socat? A non-working example to make it more clear:
socat TCP-LISTEN:8080,reuseaddr, "exec:ls&...
- 23
2
votes
1
answer
5k
views
IPv4 to IPv6 proxy/passthrough
I recently had an app rejected from the ios store for crashing during their (now) mandatory IPv6 test (didn't even know they did that).
My server (on AWS) wasn't setup for IPv6, but I've fixed that ...
- 195
2
votes
1
answer
6k
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UDP multicast send/receive: Routing or socat issues?
I'm using 'socat' on Linux Centos 7 to diagnose some problems. Server and clients are all linux centos7, they all have multiple interfaces. Server 10.1.1.1 is on Switch 1, 10.1.1.2 is on Switch 2. ...
- 245
2
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1
answer
5k
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Simulate tcp disconnect using socat
I am trying to use socat command to simulate a tcp disconnect between my client service and EMS broker process on a remote host. I am running this socat command
socat TCP-LISTEN:8123,fork TCP:...
- 141
2
votes
2
answers
862
views
Resolving HAProxy BADREQs using socat
I'm trying to figure out why i'm getting BADREQs from time to time, by using "show errors" in socat. The problem is that it only shows the last error. I want to be able to see all of them ( like using ...
- 409
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1
answer
2k
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What is needed to use kubernetes port forwarding through a proxy?
I have a kubernetes cluster that I can reach through an nginx proxy.
I can do kubectl get deployments -n kube-system without issue.
However, I'm trying to use helm. Helm is throwing an error:
...
- 2,273
2
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0
answers
1k
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socat Resource temporarily unavailable
I am using socat as a bridge between some devices and running socat (a couple hundreds of instances) like this:
socat -d -d -d -x -d -lf "/var/log/some_log_file" TCP4-LISTEN:6126,fork,max-children=1,...
2
votes
0
answers
623
views
use socat to provide password to bsign
I have many servers, where I deploy various binaries. For this purpose I use a script that packs them into archives, publishes to the local repository and then ssh-es to the target servers and ...
- 220
1
vote
1
answer
2k
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socat CREATE returning Bad file descriptor
I'm trying to build a quick script which listens for one UDP packet, stores it to a file, and exits.
socat to the rescue!
$ socat UDP-RECVFROM:9999 CREATE:/tmp/results_9999
2016/04/08 11:56:59 socat[...
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1
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1
answer
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Is it possible to make a web browser proxy tunnel with Netcat/Socat?
Concerning the Netcat/Socat utility . From the man page, it seems like it is possible to create a secure proxy using netcat by which I could point my web browser to like a proxy server , that could ...
- 4,190
1
vote
1
answer
8k
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socat udp packet forwarding with source address
I am trying to use socat (instead of iptables) for UDP port forwarding. I just need to redirect some traffic from UDP port 162 to 33162.
I am using something like this:
socat udp-listen:162,pktinfo,...
- 133
1
vote
1
answer
2k
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How to capture UDP traffic so it can be piped to grep
I'm trying to capture UDP traffic which is being sent as StatsD metrics (on port 8125).
The most simple approach I tried is to run nc -ul 8125 which prints the metrics to the terminal...but they are ...
- 113
1
vote
1
answer
2k
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Why Socat is sending back the input to client?
I am using this command
socat -lm -d -d TCP4-LISTEN:5555,reuseaddr,fork EXEC:/bin/myscript,chroot=/root/,su=root,pty,stderr
to start a server but when i send the i connect to it through netcat and ...
- 113
1
vote
1
answer
1k
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Need help in Haproxy socat for cacti
am using the haproxy socat to get the sessions data to plot it in cacti, /var/run/socket-haproxy is owned by www-data (the user which cacti uses) but when I try to execute this command as www-data am ...
- 964
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1
answer
740
views
Using socat forwarder over HTTP tunnel (CONNECT) over SSL/TLS
For context, i am using nginx's reverse proxy ngx_http_proxy_module to cache content from an upstream https server. For a specific project, i need nginx to pass through a corporate HTTP proxy (using ...
- 139
1
vote
1
answer
713
views
What is the iptables equivalent to what socat does?
What is the iptables equivalent to the following?
socat TCP-LISTEN:8080 TCP:some-random-host-in-another-network.com:80
Now multiple clients can connect to port 8080 of this middle host to actually ...
- 48
1
vote
1
answer
5k
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Forwarding SNMP ports over SSH
I access my work network through a VPN and have access to every host in there through SSH. Currently I need to access around 3000 hosts via SNMP, but corporate sec policies restrict SNMP access ...
- 117
1
vote
0
answers
554
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'socat' not displaying incoming UDP packets, but Wireshark does
The link is an image of a Wireshark dump of an incoming 60-byte Ethernet frame which contains a UDP packet. The packet payload is the single word 'hello' (sorry, I don't have enough rep to paste the ...
- 183
1
vote
0
answers
2k
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ping packet loss in wireguard UDP over TCP + UDP over socat tunnels
I have a wireguard tunnel mostly working between two Debian systems, but I had to workaround a ISP firewall (firewall X in the diagram below) that blocks everything inbound and prevents Server B from ...
- 432
1
vote
1
answer
1k
views
Invoke remote program with socat and wait for it to complete
I need to invoke a program x on server foo from client bar. Program x takes some time to load, then reads input from stdin and transmits output to stdout before terminating. I've been trying to use ...
- 291
1
vote
0
answers
622
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Simple socat UDP6 relay test setup not working
I'd like to use socat as a relay to let two players (both behind firewalls) of my game connect to each other. The game engine uses UDP.
Player A will host the game server, player B will join as client,...
- 11
1
vote
0
answers
53
views
Encapsulate udp traffic info tcp with on-disk buffering
My ipfix flow receiver supports only udp (can't be replaced), which is not resistant to network failures and then I'm loosing flow data. To improve this I'm thinking about using socat, mkfifo between ...
- 11
1
vote
1
answer
500
views
End of line after socat readbytes limit is reached
We wanted to use socat to make a process available that is line-based:
socat SYSTEM:"echo \$\$;sed -u /^%/s/foo/bar/" \
TCP-L:1234,fork,reuseaddr,readbytes=21,bind=localhost
This works but only ...
- 363
1
vote
0
answers
857
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socat multiple reads from pipe via SSH
I would like to read input on a named pipe on a remote server from my local machine. I have a script on the remote server that is triggered as a CRON job. So every now and then by script writes ...
- 111
1
vote
0
answers
948
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Socat interacting with specific host (reverse shell) from mutiple clients/connections
I have a threaded c/c++ application that gives a pty reverse shell installed on multiple linux clients they all connect back to same server/port
now I need to find a reliable method to interact with a ...
- 11
1
vote
2
answers
5k
views
How to tunnel the serial port from a remote machine?
I'm trying to access a remote serial console (a tty port on a remote machine) as if it's on a local machine. This is necessary for a serial-port only application to work on my machine. The remote tty ...
- 141
1
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1
answer
953
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with socat, given port on the remote (server) host is to be forwarded to the given host and port on the local side
Is it possible to use socat to achieve the following, without the need of using ssh?
> ssh -N -R 8080:localhost:1080 [email protected]
-R [bind_address:]port:host:hostport
Specifies that the ...
- 155
0
votes
2
answers
144
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Dumping the contents of HTTP packets between two VPNs
Here's my setup:
Client ---> VPN 1 (my pc, same subnet of the client) --> VPN 2 (external VPN) --> Internet
Both VPNs are L2TP/IPSec and the first one is an Ubuntu server with Openswan.
I need to ...
- 123
0
votes
2
answers
1k
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Redirect to port based on requested (sub)domain (1 IP, non-HTTP request) [duplicate]
Possible Duplicate:
How to use DNS to redirect domain to specific port on my server
So I've been trying to figure out how to redirect a subdomain to a specific port.
Let's assume the application ...
- 101
0
votes
1
answer
1k
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how to create a tar file with checksums, but without compression
(note, this is not a duplicate of Creating a tar file with checksums included)
I'm familiar with using tar + gzip to create a compressed tar file (tar cf - files | gzip > something.tar.gz), and ...
- 145
0
votes
1
answer
2k
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Using socat to exec php cli
There are multiple client programs that periodically connect to a port on my server and send a single line of text.
When a connection to the port is made I need to start a PHP CLI script that ...
- 163
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0
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28
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iptables as proxy server for IoT devices similar to socat
I am able to forward incoming TCP traffic from IoT devices hitting a port towards another destination server using socat using this command
socat TCP-LISTEN:5050,reuseaddr,fork TCP:some-random-host-in-...
0
votes
1
answer
184
views
K8s Port Forwarding via kubectl and socat
My k8s pod is connecting to a certain https target. This target is not reachable from my local machine, so I wanted to use kubectl proxy + socat to make that target available on my local machine für ...
