Configuring UDP Port Scan Attack Screen

date_range 18-Aug-21

arrow_backward

arrow_forward

This topic describes how to configure detection of a UDP port scan attack.

These attacks scan the target IP addresses for open, listening, or responsive services by targeting multiple protocols or ports on one or more target IP address using obvious (sequentially numbered) patterns of the target protocol or port numbers. The patterns are derived by randomizing the protocol or port numbers and randomizing the time delays between the transmissions.

To enable detection of a UDP port scan attack:

Configure interfaces and assign an IP address to interfaces.

content_copy zoom_out_map
[edit]
user@host# set interfaces ge-0/0/1 unit 0 family inet address 192.0.2.0/24
user@host# set interfaces ge-0/0/3 unit 0 family inet address 198.51.100.0/24

Configure security zones trustZone and untrustZone and assign interfaces to them.

content_copy zoom_out_map
[edit]
user@host# set security zones security-zone trustZone host-inbound-traffic system-services all
user@host# set security zones security-zone trustZone host-inbound-traffic protocols all
user@host# set security zones security-zone trustZone interfaces ge-0/0/1.0
user@host# set security zones security-zone untrustZone host-inbound-traffic system-services all
user@host# set security zones security-zone untrustZone host-inbound-traffic protocols all
user@host# set security zones security-zone untrustZone interfaces ge-0/0/3.0

Configure security policies from untrustZone to trustZone.

content_copy zoom_out_map
[edit]
user@host# set security policies from-zone untrustZone to-zone trustZone policy policy1 match source-address any
user@host# set security policies from-zone untrustZone to-zone trustZone policy policy1 match destination-address any
user@host# set security policies from-zone untrustZone to-zone trustZone policy policy1 match application any
user@host# set security policies from-zone untrustZone to-zone trustZone policy policy1 then permit
user@host# set security policies default-policy deny-all

Configure security screens and attach them to untrustZone.

content_copy zoom_out_map
[edit]
user@host# set security screen ids-option untrustScreen udp port-scan
user@host# set security screen ids-option untrustScreen alarm-without-drop
user@host# set security zones security-zone untrustZone screen untrustScreen

Configure syslog.

content_copy zoom_out_map
[edit]
user@host# set system syslog file syslog any any
user@host# set system syslog file syslog archive size 10000000
user@host# set system syslog file syslog structured-data
user@host# set security policies from-zone untrustZone to-zone trustZone policy policy1 then log session-init
user@host# set security policies from-zone untrustZone to-zone trustZone policy policy1 then log session-close

Commit the configuration.
```
[edit]
user@host# commit
```

arrow_backward PREVIOUS Configuring TCP Port Scan Attack Screen

NEXT arrow_forward Configuring IP Sweep Attack Screen

Common Criteria Configuration Guide for NFX350 Network Services Platform

Configuring UDP Port Scan Attack Screen

Stay in touch

Helped me install or use the product
Accelerated my deployment

Discuss the product with a co-worker
Make a purchase inquiry

Common Criteria Configuration Guide for NFX350 Network Services Platform

Configuring UDP Port Scan Attack Screen

Related Documentation

Stay in touch