Command Examples

POP

POP protocol is session based.

Changes occur only after you type QUIT.

USER [username] # type the username
PASS [password] # type the password
QUIT # log out

STAT # Total number of messages and total size
LIST # List all messages - indexed list
RETR [message index] # retrieve the message with the index id
DELE [message index] # Delete specified message
TOP [message index] [num lines] # return headers and top X lines of a message
UIDL [message index] # return unique ID
NOOP # Do nothing (no operation)
RSET # Undelete the messages if any marked for deletion

SMTP

HELO[FQDN] # establish connection
MAIL FROM # specify email address of the sender
RCPT TO # specify email address of the recipient
DATA # present content of the message (body text, attachments) you must send a . (full stop) on a new line to complete the command
RSET # aborts current transacitons
VRFY # check if user or mailbox exists on the server
NOOP # Do nothing (no operation)
QUIT # Exit

SNMP

Some of the utilities used for SNMP protocol

• snpget
• snmpwalk
• snmpbulkget
• snmpbulkwalk

SIP

INVITE # invite a user to a call
ACK # acknowledgment is used to facilitate reliable message exchange for INVITEs.
BYE # Terminates a connection#
CANCEL # Terminates a request, or search for a user.
OPTIONS # solicits information about a server’s capabilities
REGISTER # registers a user’s current location
INFO # used for mid-session signalling

Telnet

-d #debug
-a #automatic login
-n tracefile # opens tracefile
-l user #specify user
-e escape char # specify escape char
-E # no character is recognised as escape character
-x # activate encryption

#Modes
character # Disables LINEMODE
line # enables LINEMODE
send abort # abort process
environ define variable value # assign a value to a variable