the Terminal just says:
ssh: connect to host xxx.xxx.xxx.xxx port 22: Connection timed out
Here are the firewall rules.
I can't ssh into the VM so I cant change the firewall rules on the VM
Please Help.
First, double-check your IP address: it must match your Oracle Virtual Cloud Public IP Address, assuming it is a reserved one (meaning it is a fixed one)
Second, check your local firewall: you cannot change the remote ones, but the local rules might still block your SSH traffic.
As mentioned here:
ust by opening the port through firewall and security lists will not allow new incoming connections. Ex: unless there is a service listening on port 443 (Tomcat etc), you will be unable to connect. Same with SSH daemon for port 22.
So make sure the SSH daemon is up and running.
Check also Default Security List
Unlike other security lists, the default security list comes with an initial set of stateful rules, which should in most cases be changed to only allow inbound traffic from authorized subnets relevant to the region that homes that VCN or subnet.
A list of authorized subnet ranges relevant to each region can be found here .
In particular:
Stateful ingress: Allow TCP traffic on destination port 22 (SSH) from authorized source IP addresses and any source port.
This rule makes it easy for you to create a new cloud network and public subnet, launch a Linux instance, and then immediately use SSH to connect to that instance without needing to write any security list rules yourself.
You can mount your machine drive to some other machine, edit sshd config and mount it back.
That helped me :D
See this ref: https://blogs.oracle.com/cloud-infrastructure/post/recovering-opc-user-ssh-key-on-oracle-cloud-infrastructure
Related
I am trying to set up an Apache Airflow server on ec2. I managed to get it running and verify status by hitting /health endpoint using curl on http://localhost:8989. Airflow listens on port 8989 here.
The next I want is to be able to connect to the admin dashboard/UI using the browser on EC2's public IP. So I added the inbound rule in the AWS security group ec2 instance belongs to.
While connecting to Airflow, I am getting the following error
Failed to connect to ec2-XX-XX-XXX-XXX.compute-1.amazonaws.com port 8989: Operation timed out
Not sure what else I need to do to reach server running on ec2.
If you can SSH to an EC2 instance, you've added a security group rule for ingress on another port, but can't reach the instance on that port, here are some other things to check:
Firewall running on the instance. Amazon Linux and recent official
Ubuntu AMIs shouldn't have iptables or some other firewall running on
them by default, but if you're using another AMI or someone else has
configured the EC2 instance, it's possible to have iptables/ufw or
some other firewall running. Check processes on your instance to make
sure you don't have a firewall.
Network ACL on the VPC subnet. The default ACL will permit
traffic on all ports. It's possible that the default has been changed
to allow traffic only on selected ports.
Multiple security groups assigned to the EC2 instance. It's possible
to assign more than one security group to the instance. Check to make
sure you don't have a rule in some other security group that's
blocking the port.
I want to have a SSH connection from my local windows machine or VM on my computer to Azure windows server VM. I tried Cygwin and Putty but both of them gave timeout connection. I used public ip address and opened port 22 on Azure VM.
I will appreciate if some one can give me any hints or links.
There are multiple firewalls that can be the reason here. Fist you must have a rule on the server to allow incoming SSH requests (port 22). Then you need to configure the NSG(Network security group) to allow incoming on port 22. If it still doesn't work, you need to verify that you are allowed to do an outgoing SSH request from your computer.
Thanks for suggestions, I found the problem which was the host machine IP address(ipconfig) (where is a local VM inside domain) was different from the IP address that communicate outside the domain to internet. I was set in NSG of Azure VM to only accept this IP and because of that it gave time-out error. After changing the IP it works.
I have hosted web application (developed in PHP) on Amazon EC2 micro instance. As per default setting, i can access 80, 22, 443 and 3306 ports from remote locations means from Home(terminal window) using telnet command.
I want to open another custom TCP port XXXXX. I have added that port in Security Group. when i am trying to connect that port through telnet command it is always show "Connection refused".
I have been trying to solve this issue for 3 days but could not get successful solution.
Help would be really appreciated.
Thanks
Adding a port in security group (inbound) ensures that the port can be accessed from outside. Please check following
Is the port open for anywhere (0.0.0.0/0) or for a custom IP. If for custom IP, please check the IP of your machine (search 'what is my ip' on google).
Is there any application listening on the port on EC2 machine.
I have tried everything, I can get to my application using the ec2-x-x-x-x.compute-1.amazonaws.com, I cannot ping the address.
However, when I do ping the amazon DNS, it identifies with the IP address of but does not respond to ping.
When I put the IP address in the browser, it times out and gives me the Chrome "Oops", I have went through the Security vgroup several times.
I have checked the server, including the IPtables and the ports that Apache is listening to.
I don't have a lot of knowledge in this area, But I tried everything in the forum and more.
I even created another Elastic IP and associated it with the instance.
Please help.
By default, you cannot ping an EC2 instance, since it is blocked by the firewall (see why can't I ping my instance):
Ping uses ICMP ECHO, which by default is blocked by your firewall.
You'll need to grant ICMP access to your instances by updating the
firewall restrictions that are tied to your security group.
ec2-authorize default -P icmp -t -1:-1 -s 0.0.0.0/0
Check out the latest developer guide for details.
Section: Instance Addressing and Network Security -> Network Security
-> Examples
As for HTTP requests - your instance is available and looks fine (I suggest you remove the real DNS name from your post though)...
For ec2 best options is
1) open port 5060 and 10000-20000 udp on firewall(security group)
2) order and attach elastic IP.
3) in sip.conf add
externhost=elastic_ip_her
localnet=10.0.0.0/255.0.0.0
Every time you start/stop that instance attach same elastic IP.
For web access you also need open port 80 in security group
I am having trouble connecting to an Amazon Elastic Cloud Computer Instance via a browser.
I attempted going to ********.compute-1.amazonaws.com , but the browser returns that the connection has timed out.
I can connect via ssh and winscp. That is how I uploaded a web app I developer. I have also created a security group and added rules to open ports 22 and 80.
Do I have to assign the security group to the instance somehow?
The security group's rules also do not have a source IP, well they do its 0.0.0.0/0
I would really appreciate any and all help in getting this site ' viewable ' via a browser.
By default, your instances will only be in the default security group. If it's an EC2 instance you cannot change security groups while the instance is running, you'll have to specify them in advance. If it's a VPC instance you can change security groups at runtime.
Add the rule to the default group
You can however add the rule to allow port 80 to that default security group; just don't create a new security group as it can not be associated with the running instance.
Is the web server up?
Also, make sure that your web server is up and running. From your instance (using SSH shell access), check if the right process is listening on port 80, using the command netstat -lnp. You should then see a row with proto tcp and a Local Address ending in :80. The IP Address listed should be either 0.0.0.0 (meaning 'any IP') or a specific IP of a listening network interface.
Web server not up
If you are in need of a web server, take a look at Apache or Nginx. They both support PHP.
Hope this helps.
I had also faced similar issue with ec2 micro instance. I was using Red-Hat AMI. Despite of opening ports 8081 in security group, I was not able to a telnet to the host port. Disabling the iptable did the trick for me:
sudo /etc/init.d/iptables stop
Do not forget to disable firewall if you use windows for your server.
I faced the same issue while setting up redash AMI image on AWS. Inbound security rules should be changed when instance is not running. Let's say if the instance is running (meaning it's active and started); If you change the inbound rules of that machine you'll still face firewall issue. So Stop the machine on which you want to change the inbound rules on. Change the inbound rules. Start the machine now. Now you can hit the machine url from the ip you just opened the access to the machine to.
The EC2 instance firewall is maybe enabled.
Check it with this command:
sudo systemctl status firewalld
if enabled you can disable it with :
sudo systemctl disable firewalld
or setup rules to allow port 80 trafic