Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Patch 489 #511

Merged
merged 4 commits into from
Oct 26, 2022
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 7 additions & 9 deletions en/azure/networksecuritygroups/open-telnet.md
Original file line number Diff line number Diff line change
Expand Up @@ -15,16 +15,14 @@
| **Recommended Action** | Restrict TCP port 23 to known IP addresses |

## Detailed Remediation Steps


1. Log into the Microsoft Azure Management Console.
2. Select the "Search resources, services, and docs" option at the top and search for Network security groups. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step2.png"/>
1. Log in to the Microsoft Azure Management Console.
2. Click the search bar at the top and search for Network security groups. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step2.png"/>
3. Select the "Network security group" that needs to be verified. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step3.png"/>
4. Click on the "Name" of the selected "Network security group" to access the port configurations. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step4.png"/>
5. In the "Overview" tab scroll down the page and check the "Inbound security rules" under the "Settings". </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step5.png"/>
6. If the "Telnet" for port 23 with the protocol "TCP" is showing as "Allow" for all "Source" and "Destination" then the selected "Network security group" has TCP port 23 for Telnet open to the public. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step6.png"/>
7. Repeat steps number 2 - 6 to verify other "Network security group." </br>
8. Navigate to the "Network security group" and select the security group that needs to modify for restricting the "TCP" port for "Telnet" on port 23 to specific IP Address.</br> <img src="/resources/azure/networksecuritygroups/open-telnet/step8.png"/>
6. If the "Telnet" for port 23 with the protocol "TCP" is showing as "Allow" under column "Action" for all "Source" and "Destination" then the selected "Network security group" has TCP port 23 for Telnet open to the public. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step6.png"/>
7. Repeat step number 2 - 6 to verify other "Network security groups". </br>
8. Navigate to the "Network security group" and select the security group that needs to be modified for restricting the "TCP" port for "Telnet" on port 23 to specific IP Address.</br> <img src="/resources/azure/networksecuritygroups/open-telnet/step8.png"/>
9. Scroll down the left navigation panel and choose "Inbound security rules" under "Settings."</br> <img src="/resources/azure/networksecuritygroups/open-telnet/step9.png"/>
10. Click on the "Telnet" protocol in the "Name" column and under "Source" select the "IP Address" from the dropdown menu and enter the "Source IP addresses/CIDR ranges" as per the requirement, select the required Protocol and Action and click on the "Save" option at the top panel. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step10.png"/>
11. Repeat steps number 8 - 10 to restrict TCP port 23 for Telnet to known IP addresses.</br>
10. Click on the "Telnet" protocol in the "Name" column and in the right pane under "Source" select the "IP Address" from the dropdown menu and enter the "Source IP addresses/CIDR ranges" as per the requirement, select the required "Protocol" and "Action" and click on the "Save" option at the top of the pane. </br> <img src="/resources/azure/networksecuritygroups/open-telnet/step10.png"/>
11. Repeat step number 8 - 10 to restrict TCP port 23 for Telnet to known IP addresses.</br>
Binary file modified resources/azure/networksecuritygroups/open-telnet/step10.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified resources/azure/networksecuritygroups/open-telnet/step2.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified resources/azure/networksecuritygroups/open-telnet/step3.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified resources/azure/networksecuritygroups/open-telnet/step4.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified resources/azure/networksecuritygroups/open-telnet/step5.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified resources/azure/networksecuritygroups/open-telnet/step6.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified resources/azure/networksecuritygroups/open-telnet/step8.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified resources/azure/networksecuritygroups/open-telnet/step9.png
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.