Other Security Subjects

We recently upgraded some 3650s and 3850s for 16.3.8 to 16.6.6(recommended), and now we are having issues where we cannot create or add object-groups. We also cannot find any documentation on changes made to object groups. The show Object-group works...

A friend of mine recently donated an SG200-50 switch to me that his company insisted on throwing out after a ransomware attack crippled their business.Is there any way for me to check that the switch is actually safe to use? It is going to be used in...

Hey all,can someone tell me which benefits implementing MACSec in a LAN would have?I understand that you can do encryption from switchport to device and between switches.Which attacks does MACSec prevent? Thank you. 

What are some good tools or ways to monitor network changes on cisco routers and switches in a medium sized business? Preferably tools that will allow a network administrator to go in and see if any changes were made in the router or switch configura...

My customer, head of security, wants to ensure the newsletter she is receiving from Cisco/Talos is not some marketing scam. She questioned the sender:  Cisco <engage@b2me.cisco.com> and wants to validate it's authenticity as it is being sent to her s...

i have been asked to list a switch under radius control , some switches are already added under it but im supposed to add any switches that arent , can i simply add the same command to other switches? also the key is made of numbers do i just paste t...

I want to block this mac address from my router : 00:50:8b:5d:29:7a Is there an ACL that I can use to do this

hello,i want to use 'no service tftp' and 'line console 0 -> login local' .but there is no command. model name is c3650 and 16.3.9 version please answer about my question.  

Hi all, Does somebody has experience deploying WAN MACsec encryption with an ASR 1001-X on a 10Gbps DCI links based on MetroEthernet service? Main questions are:Is it stable or how many link interruptions do you have per year?Does it perform? (10Gbps...

I'm studying for the CCNA-Security exam 210-260 and I'm finding some inconsistencies in the material, especially on sample tests questionsThe one that I keep getting hung up on is which auth methods OSPF supports. One place says DES and MD5 while oth...