Today I wrote a little script that will find the MAC address of a given IP that is on the same LAN.
The script pings the IP, then it checks the ARP cache to find the MAC. Pretty simple, yet very useful.
Download FindMacFromIP.vbs
Usage: cscript findmacfromip.vbs ‘IP Address’
EDIT: I have found a much easier way to list the FSMO Roles holders.
From a command line on any domain controller, Type netdom query FSMO
Thanks to Microsoft, I have an easy solution to finding the FSMO Roles holders in a domain.
To ouput all the FSMO Role holders of a domian:
Download the file dumpfsmos.zip, extract the file, and run dumpfsmos.bat from the command line with a single argument of a domain controller.
dumpfsmos.bat MyDC01
To change any of the Operations Masters Follow these instructions.
Each FSMO Role has a diferent procedure to change the owner:
RID, PDC, and Infrastructure Roles:
From the computer that you want to make the new FSMO Role holder:
Domain Naming Role:
From the computer that you want to make the new FSMO Role holder:
Schema Master Role:
From the computer that you want to make the new FSMO Role holder:
* if you do not see ‘Active Directory Schema’ in the list, you need to register schmmgmt.dll. To do this, run regsvr32 schmmgmt.dll at a command line, then re-open the ‘Add/Remove Snap-in’ menu.
To view what Domain Controller holds which FSMO Roles, see this post.
Since I wrote up testing pop3 with telnet, I thought I would also wirte how to test SMTP with telnet.
From a command line in windows:
telnet
open IPofSmtpServer 25
220 mail.server.domain Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at . . . .
ehlo test.com
(test.com is the FROM domain)
250 OK
mail from:me@myDomain.com
250 2.1.0 me@myDomain.com. . . .Sender OK
rcpt to:you@yourDomain.com
250 OK – you@yourDomain.com
DATA
354 Start mail input; end with <CRLF>.<CRLF>
Subject: The Subject of the message.
Press enter TWICE.
The body of the message goes here.
Press enter.
Enter a single period (.) and press enter once more.
250 2.6.0 <………………….> Queued mail for delivery
Quit
221 2.0.0 mail.yourDomain.com Service closing transmission channel
I found an easy way to test a pop3 connection today. It is a little know tool called telnet (It’s not really little know, but I never though of using it for pop3 so in my mind it is little known for that purpose).
From a command line in windows:
telnet NameOfPop3Server 110
user username
pass password
list
You will see a list of email in your mailbox
retr msgNumber
You will see the email you requested
quit
More POP3 commands:
stat – Returns the number of messages in mailbox and size of mailbox
dele msgNumber – Marks message msgNumber for deletion.
noop – Doesn’t do anything, just returns a positive response.
rset – Unmarks any messages that are marked for deletion.
top msgNumber numLines – Returns the header info and numLines of the body of message msgNumber.
uidl msgNumber – Returns the message number and the messages Unique ID Listing.
Note: If the telnet session ends for any reason other than using the quit command, messages marked for deletion will not be deleted.