Cisco Cisco IPS 4255 Sensor 릴리즈 노트

ROMMON uses TFTP to download an image and launch it. TFTP does not address network issues such 
as latency or error recovery. It does implement a limited packet integrity check so that packets arriving 
in sequence with the correct integrity value have an extremely low probability of error. But TFTP does 
not offer pipelining so the total transfer time is equal to the number of packets to be transferred times 
the network average RTT. Because of this limitation, we recommend that the TFTP server be located on 
the same LAN segment as the sensor. Any network with an RTT less than a 100 milliseconds should 
provide reliable delivery of the image. Be aware that some TFTP servers limit the maximum file size that 
can be transferred to ~32 MB.

For the procedure for downloading IPS software updates from Cisco.com, refer to

For the procedure for configuring automatic updates, refer to 

.

Use the following tools for configuring IPS 6.0(1)E1 sensors:

IDM 6.0

IPS CLI 6.0

ASDM 5.2

CSM 3.1

Use the following tools for monitoring 6.0(1)E1 sensors:

MARS 4.2 and 4.3(1)

IEV 5.2

CSM 4.0

Viewers that are already configured to monitor the 5.x sensors may need to be configured to 
accept a new SSL certificate for the 6.0(1)E1 sensors.

The Cisco Security Intelligence Operations site on Cisco.com provides intelligence reports about current 
vulnerabilities and security threats. It also has reports on other security topics that help you protect your 
network and deploy your security systems to reduce organizational risk.

You should be aware of the most recent security threats so that you can most effectively secure and 
manage your network. Cisco Security Intelligence Operations contains the top ten intelligence reports 
listed by date, severity, urgency, and whether there is a new signature available to deal with the threat.

Cisco Security Intelligence Operations contains a Security News section that lists security articles of 
interest. There are related security tools and links.