Yesterday, my tests with iperf3 were working fine.
Today unfortunately it seems the initial connection is made but it freezes after that.
Below the outputs.
Server:
Server listening on TCP port 5201
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 185.70.XXX.XXX port 5201 connected with 85.73.XXX.XXX port 55217
Client:
D:\Tools\iperf3>iperf3 -c 185.70.XXX.XXX -p 5201
Related
After following the installation instructions referenced at https://superset.apache.org/docs/installation/installing-superset-from-scratch, I'm not able to see the app at the ip number/server port in my win 10 web browser. How do I make it work at the right ip address?
I've installed it under venv running on a CentOS 8 VM on my win 10 laptop. I'm using the NAT network adapter and I can can use putty and the CentOS 8 cockpit app is available on port 9090.
Currently it says it's running at 127.0.0.1:8089:
(venv) /root>superset run -p 8089 --with-threads --reload --debugger
logging was configured successfully
2021-08-04 15:35:48,492:INFO:superset.utils.logging_configurator:logging was configured successfully
2021-08-04 15:35:48,505:INFO:root:Configured event logger of type <class 'superset.utils.log.DBEventLogger'>
/root/venv/lib64/python3.8/site-packages/flask_caching/__init__.py:201: UserWarning: Flask-Caching: CACHE_TYPE is set to null, caching is effectively disabled.
warnings.warn(
No PIL installation found
2021-08-04 15:35:48,722:INFO:superset.utils.screenshots:No PIL installation found
* Serving Flask app "superset" (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
2021-08-04 15:35:50,007:INFO:werkzeug: * Running on http://127.0.0.1:8089/ (Press CTRL+C to quit)
netstat shows port 8089 open for 127.0.0.1, but not the VM's ip number. nmap shows the port closed.
/root>netstat -tlpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 944/sshd
tcp 0 0 127.0.0.1:8089 0.0.0.0:* LISTEN 4247/python3
tcp6 0 0 :::9090 :::* LISTEN 1/systemd
tcp6 0 0 :::22 :::* LISTEN 944/sshd
/root>nmap 192.168.42.130
Starting Nmap 7.70 ( https://nmap.org ) at 2021-08-04 15:45 PDT
Nmap scan report for kevinsAppServer (192.168.42.130)
Host is up (0.000015s latency).
Not shown: 998 closed ports
PORT STATE SERVICE
22/tcp open ssh
9090/tcp open zeus-admin
Nmap done: 1 IP address (1 host up) scanned in 1.73 seconds
/root>nmap -p 8089 192.168.42.130
Starting Nmap 7.70 ( https://nmap.org ) at 2021-08-04 15:45 PDT
Nmap scan report for kevinsAppServer (192.168.42.130)
Host is up (0.000067s latency).
PORT STATE SERVICE
8089/tcp closed unknown
I think it should work if i can get the port opened on my server's IP number, unless there's something I did wrong..
I got it to work by adding the -h option for the superset run command, which I found when running the superset run --help at the server command line. So now this command works:
superset run -h my.i.p.adddress -p 8089 --with-threads --reload --debugger
In my case I also had to open port 8089 on the CentOS firewall.
I installed apache server on my computer...
I want to simulate how the server works in order to test my code.
After instllation when I run it, i got this message:
I couldn't find what cause this problem.
EDIT: this is what I see...
How do I srart the server? How do I "upload" my code to it?
You have something using port 80.
1) Start the prompt
Start menu -> Run -> Type cmd.exe
or
"Windows button" + R -> Type cmd.exe .
or
2) Follow instructions below
netstat -ano
Example result (my OS is Swedish so I translated the headings so it might not match 100%):
Active connections
Proto Local address Remote address Status PID
TCP 0.0.0.0:135 0.0.0.0:0 LISTENING 932
TCP 0.0.0.0:445 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:623 0.0.0.0:0 LISTENING 7896
TCP 0.0.0.0:3389 0.0.0.0:0 LISTENING 1384
TCP 0.0.0.0:5357 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:7779 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:7800 0.0.0.0:0 LISTENING 4
And check the list to see if you have another server running.
The last column is the PID. Check it in task manager or any other way you like.
First stop the Apache server, then start it again. It looks like you already started the server, and again try to start
VirtualBox Port Forwarding on Windows 7 not Working
Im trying to ssh onto my VirtualBox from my Windows 7 host via port forwarding, but VirtualBox wont open the port for listening. I can connect to it by turning on the VirtualBox GUI and navigating via that terminal, but I cannot connect via a standard ssh client from my host. I want to be able to ssh on port 2222 on my host to the guest.
Here's my setup:
Host: Window 7 SP1
Guest: Ubunto Ubuntu 12.04
VirutalBox: 4.3.26
Host Processor: Intel Core i7 920
The guest machine is configured as a NAT and port forwarding is enabled for 127.0.0.1 for host port 2222 to guest port 22.
The output from ifconfig on the guest:
eth0 inet addr:10.0.2.15 Bcast:10.0.2.255 Mask: 255.255.255.0
The output from ps -ef | grep sshd on the guest:
root 625 1 0 12:27 ? 00:00:00 /usr/sbin/sshd -D
The output from netstat -ant | grep 22 on the guest:
tcp 0 0 0.0.0.0:22 0.0.0.0:*
tcp6 0 0 :::22 :::*
But on the host, netstat -ant | grep 2222 doesnt show anything.
In the VBox.log however I have this:
00:00:03.413790 NAT: set redirect TCP host 127.0.0.1:2222 => guest 10.0.2.15:22
00:00:03.424301 supR3HardenedErrorV: supR3HardenedScreenImage/LdrLoadDll: rc=VERR_LDRVI_UNSUPPORTED_ARCH fImage=1 fProtect=0x0 fAccess=0x0 \Device\HarddiskVolume2\Windows\mfnspstd64.dll: WinVerifyTrust failed with hrc=Unknown Status 0x800B0101 on '\Device\HarddiskVolume2\Windows\mfnspstd64.dll'
00:00:03.424422 supR3HardenedErrorV: supR3HardenedMonitor_LdrLoadDll: rejecting 'C:\Windows\mfnspstd64.dll' (C:\Windows\mfnspstd64.dll): rcNt=0xc0000190
00:00:03.424476 NAT: failed to redirect TCP 127.0.0.1:2222 => 10.0.2.15:22
The last line looks like the suspect but there's no clue as to why it fails to redirect. I've tried all of the following from various other posts and forums but cant get it to listen on any port on the host:
Turned off the firewall
Changed the port
Enabled VT-X on BIOS
Disabled Hyper-V
Tried numerous different builds of VirtualBox
Any help would be much appreciated. Works fine on my Mac Book with OS-X.
Did you set forwarding in machine settings ?
To forward ports in VirtualBox, first open a virtual machine’s settings window by selecting the Settings option in the menu.
Select the Network pane in the virtual machine’s configuration window, expand the Advanced section, and click the Port Forwarding button. Note that this button is only active if you’re using a NAT network type – you only need to forward ports if you’re using a NAT.
Use VirtualBox’s Port Forwarding Rules window to forward ports. You don’t have to specify any IP addresses – those two fields are optional.
Also here: http://www.howtogeek.com/122641/how-to-forward-ports-to-a-virtual-machine-and-use-it-as-a-server/
I found the solution in a hypernode-vagrant issue: VirtualBox fails to establish the port forwarding for SSH on Vagrant's standard port 2222, but higher ports work. In that issue, ports >= 4000 worked, whereas ports <= 3500 would fail. On my machine running Windows 10, I found 2380 to be the first port for which the TCP redirect can be established.
The port on the host used for forwarding can be changed by adding the following lines to your Vagrantfile (where you may have to replace 4000 by a higher number):
config.vm.network :forwarded_port, guest: 22, host: 2222, disabled: true
config.vm.network :forwarded_port, guest: 22, host: 4000, id: "ssh"
I have no idea what the root cause for this behavior could look like, but the workaround has been working reliably so far.
I used this article to ssh into my Raspberry pi3 VM.
Using this command ssh -p 2222 pi#localhost.
Originally, I had kept trying to use ssh pi#10.0.2.x -p 2222, but it didn't work and kept returning a "Connection timed out." My port number is 2222, but yours could be different depending what you set in your VirtualBox.
I am using a Windows 10 into a Debian Raspberry Pi VM (VirtualBox).
When I am trying to start Apache server from Eclipse, I am getting message as:
Several ports (8085, 8009) required by Tomcat v6.0 Server at localhost are already in use. The server may already be running in another process, or a system process may be using the port. To start this server you will need to stop the other process or change the port number(s).
I find the ports are opened by any process by the OS using "netstat -an"
I found below data as listening.
TCP 0.0.0.0:8009 0.0.0.0:0 LISTENING
TCP 0.0.0.0:8080 0.0.0.0:0 LISTENING
TCP 0.0.0.0:8085 0.0.0.0:0 LISTENING
TCP [::]:8009 [::]:0 LISTENING
TCP [::]:8080 [::]:0 LISTENING
TCP [::]:8085 [::]:0 LISTENING
I don't know whether this are useful process, or can I release this ports.
If tomcat is already running eclipse will report this. This could happen if eclipse crashed.
If you only have one instance of tomcat on your machine
Try stopping it
bin/shutdown.sh
or on windows
bin/shutdown.bat
and then restarting tomcat from eclipse.
On linux
You can verify those ports are in use by another tomcat (or the same one that is already running) with
netstat -anp #running as the superuser the -p option will say what the process is
You can then check the process table to cross reference the ports
ps aux | grep java
or
ps aux | grep 1234 #replacing 1234 with the PID reported by netstat
If it is tomcat and it won't shutdown after running bin/shutdown.sh then you can kill it using the kill commmand.
If you do have something else that is using those ports
edit conf/server.xml
change the ports that tomcat will use, try 6080, 6005, etc
start tomcat from eclipse again
What ports does RabbitMQ Server use or need to have open on the firewall for a cluster of nodes?
My /usr/lib/rabbitmq/bin/rabbitmq-env is set below which I'm assuming are needed (35197).
SERVER_ERL_ARGS="+K true +A30 +P 1048576 \
-kernel inet_default_connect_options [{nodelay,true}] \
-kernel inet_dist_listen_min 35197 \
-kernel inet_dist_listen_max 35197"
I haven't touched the rabbitmq.config to set a custom tcp_listener so it should be listening on the default 5672.
Here are the relevant netstat lines:
tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 728/epmd
tcp 0 0 0.0.0.0:35197 0.0.0.0:* LISTEN 5126/beam
tcp6 0 0 :::5672 :::* LISTEN 5126/beam
My questions are:
for other nodes to be able to connect to the cluster, do all 3 ports 4369, 5672 and 35197 need to be open?
Why isn't 5672 running on tcp and not just tcp6?
PORT 4369: Erlang makes use of a Port Mapper Daemon (epmd) for resolution of node names in a cluster. Nodes must be able to reach each other and the port mapper daemon for clustering to work.
PORT 35197
set by inet_dist_listen_min/max Firewalls must permit traffic in this range to pass between clustered nodes
RabbitMQ Management console:
PORT 15672 for RabbitMQ version 3.x
PORT 55672 for RabbitMQ pre 3.x
Make sure that the rabbitmq_management plugin is enabled, otherwise you won't be able to access management console on those ports.
PORT 5672 RabbitMQ main port (AMQP)
PORT 5671 TLS-encrypted AMQP (if enabled)
For a cluster of nodes, they must be open to each other on 35197, 4369 and 5672.
For any servers that want to use the message queue, only 5672 (or possibly 5671) is required.
What ports is RabbitMQ using?
Default: 5672, the manual has the answer. It's defined in the RABBITMQ_NODE_PORT variable.
https://www.rabbitmq.com/configure.html#define-environment-variables
The number might be differently if changed by someone in the rabbitmq configuration file:
vi /etc/rabbitmq/rabbitmq-env.conf
Ask the nmap if it can see it:
sudo nmap -p 1-65535 localhost
Starting Nmap 5.51 ( http://nmap.org ) at 2014-09-19 13:50 EDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.00041s latency).
PORT STATE SERVICE
443/tcp open https
5672/tcp open amqp
15672/tcp open unknown
35102/tcp open unknown
59440/tcp open unknown
Oh look, 5672, and 15672
Ask netstat if it can see it:
netstat -lntu
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:15672 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:55672 0.0.0.0:* LISTEN
tcp 0 0 :::5672 :::* LISTEN
Oh look 5672.
lsof to see ports:
eric#dev ~$ sudo lsof -i | grep beam
beam.smp 21216 rabbitmq 17u IPv4 33148214 0t0 TCP *:55672 (LISTEN)
beam.smp 21216 rabbitmq 18u IPv4 33148219 0t0 TCP *:15672 (LISTEN)
use nmap from a different machine, find out if 5672 is open:
sudo nmap -p 5672 10.0.1.71
Starting Nmap 5.51 ( http://nmap.org ) at 2014-09-19 13:19 EDT
Nmap scan report for 10.0.1.71
Host is up (0.00011s latency).
PORT STATE SERVICE
5672/tcp open amqp
MAC Address: 0A:40:0E:8C:75:6C (Unknown)
Nmap done: 1 IP address (1 host up) scanned in 0.13 seconds
Try to connect to a port manually with telnet, 5671 is CLOSED:
telnet localhost 5671
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
Try to connect to a port manually with telnet, 5672 is OPEN:
telnet localhost 5672
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Check your firewall:
sudo cat /etc/sysconfig/iptables
It should tell you what ports are made open:
-A INPUT -p tcp -m tcp --dport 5672 -j ACCEPT
Reapply your firewall:
sudo service iptables restart
iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]
iptables: Applying firewall rules: [ OK ]
To find out what ports rabbitmq uses:
$ epmd -names
Outputs:
epmd: up and running on port 4369 with data:
name rabbit at port 25672
Run these as root:
lsof -i :4369
lsof -i :25672
More about epmd options.
Port Access
Firewalls and other security tools may prevent RabbitMQ from binding to a port. When that happens, RabbitMQ will fail to start. Make sure the following ports can be opened:
4369: epmd, a peer discovery service used by RabbitMQ nodes and CLI tools
5672, 5671: used by AMQP 0-9-1 and 1.0 clients without and with TLS
25672: used by Erlang distribution for inter-node and CLI tools communication and is allocated from a dynamic range (limited to a single port by default, computed as AMQP port + 20000). See networking guide for details.
15672: HTTP API clients and rabbitmqadmin (only if the management plugin is enabled)
61613, 61614: STOMP clients without and with TLS (only if the STOMP plugin is enabled)
1883, 8883: (MQTT clients without and with TLS, if the MQTT plugin is enabled
15674: STOMP-over-WebSockets clients (only if the Web STOMP plugin is enabled)
15675: MQTT-over-WebSockets clients (only if the Web MQTT plugin is enabled)
Reference doc:
https://www.rabbitmq.com/install-windows-manual.html
Check \AppData\Roaming\RabbitMQ\log. If you have a log file there search for started TCP listener on [::].
It should tell you on which port rabbitMq is running. Look for the last entry.
Disclaimer: not the best way to find port, as there might be a chance the port has been changed in the mean time.