How to set firewall rule in Ubuntu

-

 First you need to check current status of the firewall.


- sudo ufw status


if it is showing inactive or not loaded then it's turned off, OR If it is showing running /active then need to hit below commands.


- sudo ufw stop


If you don't want to disable and you want to keep it ON then you can add firewall rule with required port number.


Example- sudo ufw enable


-sudo ufw allow 22 (Here 22 is port for SSH)


in same way you can deny this port


- sudo ufw deny 22




Comments

Post a Comment

Popular posts from this blog

How to enable AWS EBS Volume snapshots encryption

-
Using the AWS console: Sign in to AWS console and navigate to https://console.aws.amazon.com/ec2/ From the left navigation choose snapshots option. Select the actionable snapshot, choose actions. Choose the Copy Snapshot option. Check the encryption option. Under the Master key choose the kms key (It is recommended to choose KMS CMK when EBS snapshot consist of highly sensitive data). Click on copy. Once the newly encrypted snapshot is ready old snapshot should be deleted. Using AWS CLI $> aws ec2 copy-snapshot --description [description-for-new-snapshot] --destination-region [region-name] --encrypted --kms-key-id [kms-key-id] ---source-region [region-name] --source-snapshot-id [actionable-snapshot-id] Command reference: https://docs.aws.amazon.com/cli/latest/reference/ec2/copy-snapshot.html $> aws ec2 delete-snapshot --snapshot-id [actionable-snapshot-id] --region [region-name] Command reference: https://docs.aws.amazon.com/cli/latest/reference/ec2/delete-snapshot.html Note: App...
Read more

Reset Jenkins Admin Password

-
Image
  Stop Jenkins: On Linux, use sudo service jenkins stop. On Windows, stop the Jenkins service from the Services window. Access the Jenkins Home Directory: By default, the home directory is located at /var/lib/jenkins/ on Linux and %JENKINS_HOME% on Windows. Remove the config.xml for Security: In the Jenkins home directory, locate the config.xml file. Open it in a text editor and search for the <useSecurity> tag. Change the value to false: xml Copy code <useSecurity>false</useSecurity> File will look like below- Save the file and exit. Start Jenkins: Start Jenkins again (sudo service jenkins start for Linux). Jenkins should now start without asking for a login, and you can create a new user or reset the credentials. Re-enable Security: Once you've logged in and set up new credentials, go back to the config.xml file. Set <useSecurity> back to true and restart Jenkins to enable security again.
Read more

Deploying App through AWS EKS by using ingress and fargate

-
Image
 1.Create cluster Command-  eksctl create cluster --name demo-cluster --region us-east-1 --fargate (15 to 20 min) 2. Once cluster is ready check if it is visible in EKS 3. aws eks update-kubeconfig --name demo-cluster --region us-east-1 output- Added new context arn:aws:eks:us-east-1:533267033126:cluster/demo-cluster to C:\Users\Raghvendra Singh\.kube\config 4. creating fargate profile Command (linux)- eksctl create fargateprofile \          --cluster demo-cluster \          --region us-east-1 \          --name alb-sample-app \          --namespace game-2048 windows- eksctl create fargateprofile --cluster demo-cluster --region us-east-1 --name alb-sample-app --namespace game-2048 5. Application deployment- kubectl apply -f https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/v2.5.4/docs/examples/2048/2048_full.yaml 6. After deploying this app, run few c...
Read more