I'm use Linux server with vsftpd connection created successfully but i can't retrieve the files
Your screenshot shows that the connection timed out when trying to transfer something (LIST) after switching to Passive Mode (PASV). In my opinion, probably your firewall is not correctly configured for Passive Mode and therefore is blocking the connection.
Try allowing incoming (inbound) connections on port 40000 to 50000 for all IP address or the IP address of your FTP client. Configuring firewall is firewall-specific, therefore, I cannot give you detailed instruction on how to do this.
sudo ufw allow 40000:50000/tcp
sudo service vsftpd restart
Related
I tried to connect a remote MongoDB Server running on Ubuntu using MongoDB Compass on Windows. But I have problems connecting always as the IP of the Windows machine changes every day.
I did the following things to connect to the remote server-
Got the IP of the Client Machine, then allowed that IP on the firewall of the server machine on port 27017.
sudo ufw allow from client_machine_ip to any port 27017
Note: The ufw status looked okay.
Got the IP of the Server Machine, then on the MongoDB configuration file on the server, I modified the bindIp.
bindIp: 127.0.0.1,server_machine_ip
Note: I restarted mongod and it was okay too.
I was able to connect the remote MongoDB Server using MongoDB Compass successfully for the first time. Then I saw, the IP of the client machine was changing every day. So, every time, the client IP changes, I need to allow that IP on the firewall of the server machine (in which I am using the MongoDB Server) on port 27017. Could you help to solve this? Thanks in advance.
You can update the firewall for port 27017 to allow from anywhere since client machine IP is not static.
sudo ufw allow 27017 #(this will allow from any IP)
I need to find out why I'm not able to ping my local IP for my main computer from my ubuntu wsl terminal. For some reason, the WSL ip is 172.24.61.1/20. I have a postgresql server on 192.168.1.247 my main pc but it cannot even ping it. Anyone know why?
Firewall!
Turn off the firewall in windows and check the ping. Once it starts pinging add a rule for incoming and outgoing.
To turn off firewall in linux just use
systemctl stop firewalld
that is if you have firewall installed there, check it by using
systemctl status firewalld
I am trying to connect from Ubuntu 16.04 server to Gentoo server`s Postgresql database. But i cannot connect to it. Ubuntu server has internet with static Ip: 93.154.53.88. In my Gentoo server has Ip: 192.168.0.104. I configured my pg_hba.conf also to Ip address of Ubuntu server. But anyway it cannot connect to it. My pg_hba.conf is like below:
host all all 93.154.52.85/32 trust
host all all 93.154.53.88/32 md5
When i ping to my Gentoo Server like below it is not going. I think I should configure some firewall settings.
ping 93.154.53.88
But When i connected my Gentoo Server`s database from second Linux server it can connect which has Ip address: 93.154.52.85. But Ubuntu server cannot connect to it. I read some post in which iptables need to be configured Please Help me What to configure and how to do it. Any help is appreciated.
I am using postgres database which is accessed by jboss and tomcat server.
My server accidentally restarted and then postgres service was not showing in the services list.
When I tried to open postgres local host server using pgadminIII it showed following error:
Server doesn't listen
The server doesn't accept connections: the connection library reports
could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?
If you encounter this message, please check if the server you're trying to contact is actually running PostgreSQL on the given port. Test if you have network connectivity from your client to the server host using ping or equivalent tools. Is your network / VPN / SSH tunnel / firewall configured correctly?
For security reasons, PostgreSQL does not listen on all available IP addresses on the server machine initially. In order to access the server over the network, you need to enable listening on the address first.
For PostgreSQL servers starting with version 8.0, this is controlled using the "listen_addresses" parameter in the postgresql.conf file. Here, you can enter a list of IP addresses the server should listen on, or simply use '*' to listen on all available IP addresses. For earlier servers (Version 7.3 or 7.4), you'll need to set the "tcpip_socket" parameter to 'true'.
You can use the postgresql.conf editor that is built into pgAdmin III to edit the postgresql.conf configuration file. After changing this file, you need to restart the server process to make the setting effective.
If you double-checked your configuration but still get this error message, it's still unlikely that you encounter a fatal PostgreSQL misbehaviour. You probably have some low level network connectivity problems (e.g. firewall configuration). Please check this thoroughly before reporting a bug to the PostgreSQL community.
Does this problem arise due to accessing same DB by two different servers?
My server accidentally restarted and then postgres service was not
showing in the services list.
You can't connect because it's not running. You can have as many clients connecting to a PostgreSQL server as your hardware can support - there is no problem with that.
Restart your PostgreSQL service. If it won't, check the logs for why. If you don't know where your PostgreSQL logs are now is a good time to find out. I can't tell you how to restart the service because you haven't said what OS you are running or how you installed PG. Check your documentation.
I have started an ubuntu instance on AWS EC2
e.g. [ec2-user#ip-XXX-XX-XX-XX ~]$
Inside this instance, I am running a socket program for sending the data to my local system.
The program is running properly, but not able to connect to my local IP.
I am trying to ping my local system also from AWS ec2 user, but it is also not working.But I am able to ping google(8.8.8.8).
e.g. [ec2-user#ip-xxx-xx-xx-xx ~]$ ping xxx.xxx.xx.xx(my local IP)
I have set all security groups(inbound), like All Trafic,All TCP and so on.
Sorry for bad English.
Thank You
Your computer (PC) cannot be pinged from an AWS hosted machine
This is probably because the VM on your computer is using NAT outbound to talk to the LAN, which goes to an Internet router, which sends the packets to AWS
The reverse route (inbound to your PC) does not exist so starting a ping echo request from a AWS machine will not work
It is possible to get around this by opening a pass through on your router but generally this is not a great idea
However if you want to make a socket connection securely there is a way
First, start a ssh session with remote port forwarding. In the Linux ssh client this is using the -R option.
For example, if your local system is running a listening service on port 80 and your remote system has the address of 54.10.10.10 then
ssh -R 8080:localhost:80 ec2-user#54.10.10.10
Will establish a circuit such that connections to the "localhost" on the remote ec2 server on port 8080 are connected to the "localhost" on port 80 of your local machine
If you are not using a ssh cli program, most ssh clients have a facility of this sort.
Note that it is necessary to keep the ssh session open to be able to use the connections