xcode-select –install
/bin/bash -c “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)”
Tag: MAC
MAC terminal list private key and cert from pkcs12
% openssl pkcs12 -info -in pkcs12-2022.pfx -nodes
Enter Import Password:
MAC Iteration 2000
MAC verified OK
PKCS7 Data
Shrouded Keybag: Bag Attributes
localKeyID: 01 00 00 00
friendlyName: cn=pkcs12-2022
Microsoft CSP Name: Microsoft Enhanced Cryptographic Provider v1.0
Key Attributes
X509v3 Key Usage: 10
—–BEGIN PRIVATE KEY—–
xfggfgk
—–END PRIVATE KEY—–
—–BEGIN CERTIFICATE—–
gfjhhldghdf
—–END CERTIFICATE—–
Certification Authority
—–BEGIN CERTIFICATE—–
hjfhdxssggk
—–END CERTIFICATE—–
Linux arping
To see if there is a duplicate IP address a handy tool is arping.
ubuntu:$ arping 192.168.1.83
WARNING: interface is ignored: Operation not permitted
ARPING 192.168.1.83 from 192.168.1.86 eth0
Unicast request from 192.168.1.73 [00:26:C7:D0:93:D2] 203.042ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.304ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 4.564ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.706ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.247ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 38.680ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.389ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.622ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.929ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 4.700ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 3.911ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 6.664ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.071ms
Unicast reply from 192.168.1.83 [00:26:C7:D0:93:D2] 5.526ms
^CSent 15 probes (2 broadcast(s))
Received 14 response(s) (1 request(s))
If there is a duplicate IP you would see a reply from two seperate MAC addresses.
Windows getmac
You can use the Windows getmac command to get a MAC address from any Windows box if you have the hostname or IP.
C:\>getmac /s 11.11.11.50
Physical Address Transport Name
=================== ==========================================================
00-13-8B-3E-43-D0 \Device\Tcpip_{EE7D131B-C172-411B-7F12-E81F82057FEC}
N/A Hardware not present
C:\>
Router1#sh arp | i 43d0
Internet 11.11.11.50 0 0013.8b3e.43d0 ARPA Vlan777
If you are on the same IP subnet as a device use the arp command from a windows device.
C:\>ping 11.11.11.50
C:\>arp -a
Interface: 10.11.11.116 — 0xb
Internet Address Physical Address Type
11.11.11.50 00-13-8B-3E-43-D0 dynamic