I have a ec2 instance with public ip in public subnet Ubuntu 20.04, everything seems open- But I cant ping or ssh to the instance:
NACL ( I/b & O/b) : 100 - all/all 0.0.0.0/0
Route Table- 0.0.0.0/0 igw
SG: 8080, 443, 22 - 0/0
I have this " open address " hyperlink in the ec2 instance console next to public-IP and public DNS - when I try opening it does not open- can't reach this page - tries https://IP.
Putty times out, also cmd ssh:
ssh -i "pem-file.pem" ubuntu#IP
ssh: connect to host 'IP' port 22: Connection timed out
When an SSH connection times-out, it is normally an indication that network traffic is not getting to the Amazon EC2 instance.
Things to check:
The instance is running Linux
The instance is launched in a public subnet, which is defined as having a Route Table entry to points to an Internet Gateway
The instance has a public IP address, which you are using for the connection
The Network Access Control Lists (NACLs) are set to their default "Allow All" values
A Security Group associated with the instance that permits inbound access on port 22 (SSH) either from your IP address, or from the Internet (0.0.0.0/0)
Your corporate network permits an outbound SSH connection (try alternate networks, eg home vs work vs tethered to your phone)
See also: Troubleshooting connecting to your instance - Amazon Elastic Compute Cloud
If you continue to have problems, then use ssh -vvv ... to activate debugging, and add the output to your Question.
Once you have SSH working, then try to get 443 working.
Do not use Ping to test connectivity because that requires additional rules in the Security Group, and all it tests is whether Ping is working.
Reachability Analyzer is an easy solution. It will analyze the requested path and direct you to the problem.
1. VPC > Reachability Analyzer
2. Create and analyze path
In this case, I would check the path from the Internet GW to the instance on port 22
3. Find the problem
Once the analysis is completed you can find the issue. In my case it's a routing table with no route to the internet GW
4. Fix the problem
Let's add the needed route
5. Verify the path again
Rerun the analysis again
6. SSH is working
ssh -i "my_key.pem" ec2-user#ec2-900-227-116-41.compute-1.amazonaws.com
__| __|_ )
_| ( / Amazon Linux 2022 AMI
___|\___|___| Preview
http://aws.amazon.com/linux/amazon-linux-2022
Last login: Wed Dec 1 09:18:54 2021 from 84.110.59.182
[ec2-user#ip-264-31-83-228 ~]$
Related
We were able to ssh to the EC2 instance using the connect details until today; when it stopped working and I get the below error:
root#DKERP:~# ssh -i "gindustries.pem" ubuntu#ec2-15-184-231-34.me-south-1.compute.amazonaws.com
ssh: connect to host ec2-15-184-231-34.me-south-1.compute.amazonaws.com port 22: Connection timed out
Also, the telnet to public IP & port 22 is not working
root#DKERP:~# telnet 15.184.231.34 22
Trying 15.184.231.34...
telnet: Unable to connect to remote host: Connection timed out
The session manager is also failing to connect with the below error:
We weren't able to connect to your instance. Common reasons for this include:
SSM Agent isn't installed on the instance. You can install the agent on both Windows instances and Linux instances.
The required IAM instance profile isn't attached to the instance. You can attach a profile using AWS Systems Manager Quick Setup.
Session Manager setup is incomplete. For more information, see Session Manager Prerequisites.
There are no firewalls in AWS configurations.
Overview:
Security Groups:
Instances:
Network Interface:
VPC:
Network ACLs:
The system logs are updated here: https://pastebin.com/RhAG5DzP
Kindly suggest.
The Connection timed out message normally indicates that there is no network connectivity.
In most cases, this is due to the Security Group.
The steps to check it are:
Select the instance in the Amazon EC2 management console
Go to the Security tab
Check the Inbound rules
To permit an SSH connection, there needs to be a rule that permits port 22 (SSH) and the source set to your IP address or from the whole Internet (0.0.0.0/0) -- preferably only your IP address so that everybody else will be blocked.
When launching an Amazon EC2 instance from the console, it will default to creating a new Security Group called launch-wizard. However, it is generally better to create your own Security Group with a useful name and only the rules you want. You can then re-use that Security Group in future for similar instances.
I have my EC2 instance security group inbound rule to accept my ip as follows:
Outbound rule as follows:
I can connect to my instance using ssh and also ping my instance from my local machine without any issues.
When I have a server running on my EC2 instance on http protocol in port 9999 I am unable to access this site.
netstat -peanut gives me the following output on the server:
I am not sure why I am not able to access the http page locally? Should anything change in my inbound rule? I tested this on Amazon linux and ubuntu images. Nothing works.
Even though I have opened all ports on my security group aws seems to be allowing me to only access the common ports like 22, 80 and so on.
The only way I could finally access my remote server on port 9999 was by ssh tunneling:
ssh -TNL 9999:127.0.0.1:9999 <user>#<ip-address>
Im getting Timeout error on ssh connection to EC2 even after set port 22 to anywhere, i see my user and is ec2-user indeed but im getting timeout everytime
Im already tried reboot the instance and change to other security group, even try Termius software (im on MAC) instead command line but notheing...
First of all, check you VPC and subnets inside this VPC in which you have created your instance. The subnet will have a route table, verify that subnet is attached to an Internet Gateway with Destination 0.0.0.0/0, otherwise add one by referring this link. Post this step, check that your security group has an Ingress Rule for port 22 from your ip(select my ip from drop down). You will not get Connection timeout error if these two steps are configured properly.
Cannot ssh into Amazon EC2 instance, this seems to be very common problem but I have tried everything suggested in all available documents, anyone else have any idea what is missing from below?
Created new EC2 instance and downloaded the .pem file
Created a new inbound rule in EC2 instance Security group allow my local IP
Created a new inbound rule in EC2 instance Network ACL to allow my local IP
Created a new outbound rule in EC2 instance Network ACL to reach my local IP
Made sure the VPC route is attached to internet gateway
Made sure EC2 instance is attached to correct security group
After all this when I try to ssh from my local machine I'm getting connection timed out ,is there anything else I have to do
I have also disabled firewall and tested just incase
ssh -vvv -i key.pem ec2-user#********
OpenSSH_7.1p2, OpenSSL 1.0.1g 7 Apr 2014
debug1: Reading configuration data /etc/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to ec2-instance [********] port 22.
debug1: connect to address ****** port 22: Connection timed out
ssh: connect to host ******* port 22: Connection timed out
A timeout is normally an indication that there is no network connectivity. This is almost always related to the Security Group. It the error returns immediately, it means that the instance received, but rejected, the connection. If it takes a long time to respond, it typically means that the request is not reaching the instance.
Some suggestions:
Confirm that the instance has been assigned a Public IP address
Confirm that the security group is permitting Inbound Port 22 (SSH) for your IP address. In fact, for testing purposes, temporarily allow it from 0.0.0.0/0 just to eliminate one potential cause of the problem.
Remove your NACL entries. The default NACL entries permit ALL inbound and outbound access. Your changes might have negatively impacted this.
Confirm that the it is a Linux instance (Windows does not support SSH by default)
Confirm the instance is in the Public Subnet (the one with your route to the Internet Gateway)
It is possible that your network is rejecting the connection (eg due to firewall rules). Try using a different computer and/or a different network (eg home vs office) to eliminate this as a cause.
I am currently overseas and I am trying to connect to my EC2 instance through ssh but I am getting the error ssh: connect to host ec2-34-207-64-42.compute-1.amazonaws.com port 22: Connection refused
I turned on my vpn to New York but still nothing changes. What reasons could there be for not being able to connect to this instance?
The instance is still running and serving the website but I am not able to connect through ssh. Is this a problem with the wifi where I am staying or with the instance itself?
My debugging steps to EC2 connection time out
Double check the security group access for port 22
Make sure you have your current IP on there and update to be sure it hasn't changed
Make sure the key pair you're attempting to use corresponds to the one attached to your EC2
Make sure your key pair on your local machine is chmod'ed correctly. I believe it's chmod 600 keypair.pem check this
Make sure you're in either your .ssh folder on your host OR correctly referencing it: HOME/.ssh/key.pem
Last weird totally wishy washy checks:
reboot instance
assign elastic IP and access that
switch from using the IP to Public DNS
add a : at the end of user#ip:
Totally mystical debugging sets for 6 though. That's part of the "my code doesn't work - don't know why. My code does work - don't know why." Category
Note:
If you access your EC2 while you are connected to a VPN, do know that your IP changes! So enable incoming traffic from your VPN's IP on your EC2 security group.
In AWS, navigate to Services > EC2.
Under Resources, select Running Instances.
Highlight your instance and click Connect.
In Terminal, cd into the directory containing your key and copy the command in step 3 under "To access your instance."
In Terminal, run: ssh -vvv -i [MyEC2Key].pem ec2-user#xx.xx.xx.xx(xx.xx.xx.xx = your EC2 Public IP) OR run the command in the example under step 4.
Just check if your public ip that you get when you are on VPN is configured as a source address in the SG inbound entry that opens up port 22.
You can check your ip using https://www.google.co.in/search?q=whats+my+ip, when connected to your VPN.
I tried everything in this and several other answers, also in some aws youtube videos. Lost perhaps five hours over a few sessions trying to solve it and now finally..
I was getting the exact same error message as the OP. I even rented another EC2 instance in a nearer data centre for twenty minutes to see if that was it.
Then I thought it might be the router or internet provider in the guest house where I am staying. Had already noticed that some non-mainstream news sites had been blocked - and that was it!
You can check if the router is blocking port 22:
https://superuser.com/questions/1336054/how-to-detect-if-a-network-is-blocking-outgoing-ports
cardamom#neptune $ time nmap -p 22 portquiz.net
Starting Nmap 7.70 ( https://nmap.org ) at 2021-02-03 20:43 CET
Nmap scan report for portquiz.net (27.39.379.385)
Host is up (0.028s latency).
rDNS record for 27.39.379.385: ec2-27-39-379-385.eu-west-3.compute.amazonaws.com
PORT STATE SERVICE
22/tcp closed ssh
Nmap done: 1 IP address (1 host up) scanned in 0.19 seconds
real 0m0,212s
user 0m0,034s
sys 0m0,017s
Then, the question of why someone would want to block the ssh port 22 is addressed in at length here:
https://serverfault.com/questions/25545/why-block-port-22-outbound
Had the same problem after creating some instances on a new VPC. (If internet SSH worked before this solution may not work for you)
When creating a new VPC, make sure you create an internet gateway (VPC -> Internet Gateways)
And also make sure that your VPC's routing table (VPC -> Route Tables) has an entry which redirects all IPs (or just your IP) to the internet gateway you just created.
For me, it was because of this:
NOT ec2-user#xx.xx.xx.xx
BUT THIS =>>> ubuntu#xx.xx.xx.xx
Watch the image of EC2 instance!
Instead of
ssh -i "key.pem" ubuntu#ec2-161-smth.com
use
ssh -i "key.pem" ec2-user#ec2-161-smth.com