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Antispam

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IPS
This signature indicates detection of a SMTP protocol anomaly of which an unknown response from a server is sent.
  • Added: Sep 11, 2006
IPS
It indicates an unknown POP command was sent, an possible sign of a command access attempt or backdoor attempt.
IPS
This indicates an attack attempt to exploit a malformed SIP message handling error.
  • Added: Nov 30, 2011
IPS
This indicates an attack attempt to exploit a malformed SIP message handling error.
  • Added: Dec 16, 2011
IPS
This signature indicates a NTP protocol anomaly. It indicates detection of a Network Time Protocol (NTP) packet with an unknown stratum field.The Stratum field of NTP protocol is 8-bit integer and currently...
  • Added: Dec 23, 2013
IPS
This indicates an attack attempt to exploit a malformed SIP message handling error.
  • Added: Nov 16, 2011
IPS
This indicates an attack attempt to exploit a malformed SIP message handling error.
  • Added: Nov 24, 2011
IPS
The OSI Connection Oriented Transport Protocol (COTP), is used by ICCP to establish sessions and exchange connection parameters. To connect to an ICCP server, an attacker must know the destination TSAP....
  • Added: Dec 20, 2005
IPS
This indicates an attempt to send out a SIP REGISTER message with an unknown authorization scheme. This is technically valid, but because it is unexpected it might result to ambiguous SIP implementation...
  • Added: Jan 03, 2007
IPS
This protocol anomaly indicates a malformed packet with unknown type. This could be an attempt by an attacker to gain unauthorized access by exploiting known vulnerabilities.
  • Added: Sep 11, 2006