Cisco ACI - CDP Configuration

Yes.. CDP still very much exists (though LLDP is doing a fairly decent job).. and most probably, would continue to, so long as Cisco is in the big game! And if you are an old Cisco techie, like me, you would be disappointed to know that it is not as simple as "cdp run" or "cdp enable" etc.

Since you would be enabling CDP on the leaf interfaces which connect to the devices that are not the part of the fabric, you would find this configuration under Fabric >> Access Policies. Here are the steps for the configuration:

Fabric >> Access Policies >> Interface policies
Policies >> CDP Interface >> Right click on CDP interface and select "Create CDP Interface Policy"
Name it and select the Admin state.

4. Next create Leaf Policy Group from Interface Policies and reference the above CDP policy in it as shown below:

5. Time to stitch the Leaf policy group with the actual Leaf Interface.

6. Go to Interface Policies >> Interface Overrides >> Leaf Interface Overrides and right click to "Create Leaf Interface Override"

7. Select the right Path and Policy Group

And that's it.. Your desired CDP settings have been applied to the desired Leaf Interface.!!

Comments

Checkpoint - Exporting Objects in CSV format

Be it a Network Operations Manager, Security Architect or a Security Auditor, the people up the hierarchy always harangue the Security Engineers to compile the list of firewall objects or rules or policies or the traffic statistics and so on.. This can turn out to be quite hectic especially if there are no built in features to systematically provide the output in a "layman-readable" format. Come, Checkpoint's "Object Explorer..." which not only provides the output in the "layman-readable" format, but also provides in-built filtering mechanisms, thereby ensuring that the Security Engineer doesn't have to rely on Google for building his scarce Microsoft Excel data filtering skills. The following screenshots will show how easy it is, with Checkpoint R80.10 to generate the firewall configuration inventory. On the SmartConsole Unified Portal, navigate to Menu >> Open Object Explorer... Select the Categories you wish to see in your output: Click o

MITRE ATT&CK - Kerberos Vulnerabilities and Security

From the previous post, the summary of Kerberos authentication process is as below: For the initial authentication, the user’s client machine sends a request to the KDC Authentication Service (AS) . The request includes details like the user’s username, and the date and time. All information except the username is encrypted using the hash of the user’s password. The KDC AS uses the username to look up its copy of the user’s password hash and uses it to decrypt the rest of the request. If the decryption is successful, that means the client used the correct password hash and the user has successfully authenticated. Once the user is authenticated, the KDC AS sends the user’s client a ticket granting ticket (TGT) . The TGT includes a unique session key and a timestamp that specifies how long that session is valid (normally 8 or 10 hours). Importantly, before sending the TGT, the KDC encrypts it using the password hash for a special account, the KRBTGT account. That password hash is s

Tejas Jain - GCP Constraints & Random Facts

1. Google Cloud Interconnect Security Cloud Interconnect does not encrypt the connection between your on-premises network and Google's network. Cloud VPN cannot be used with Dedicated Interconnect For additional security, use application-level encryption or your own VPN 2. While using Cloud CDN, the default time-to-live (TTL) for content caching is 3600 seconds = 60 mins 3. Cloud NAT sends only the translation logs and error logs to Cloud Logging service. 4. GCP Dedicated Interconnect - On Premises network device requirements: 10-Gbps circuits, single mode fiber or 100-Gbps circuits, single mode fiber IPv4 link local addressing LACP, even if you are using single circuit EBGP-4 with multi-hop 802.1Q VLANs 5. While using Cloud VPN, the recommended MTU to be configured on the peer VPN gateway = 1460 bytes 6. Each instance must have at least one network interface. The maximum number of network instances per instance is 8, depending on the instance's machine

Tejas Jain

Search This Blog