This topic describes how to configure detection of an IP protocol scanning attack.
An IP protocol scanning attack typically involves probing a target system by sending
packets with varying IP protocol numbers to identify which protocols are supported or
active This kind of reconnaissance can be a precursor to more targeted attacks.
To enable detection of IP protocol scanning attack:
-
Configure interfaces and assign IP addresses to the interfaces.
[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.
[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.
[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 the security screen option and attach it to
the untrustZone.
[edit]
user@host# set security screen ids-option untrustScreen ip unknown-protocol
user@host# set security zones security-zone untrustZone screen untrustScreen
- Configure syslog.
[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.
