STIGQter: STIG Summary: RUCKUS ICX Router Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 27 May 2025:

The RUCKUS ICX router must be configured to have Internet Control Message Protocol (ICMP) mask replies disabled on all external interfaces.

DISA Rule

SV-273632r1110938_rule

Vulnerability Number

V-273632

Group Title

SRG-NET-000362-RTR-000114

Rule Version

RCKS-RTR-000650

Severity

CAT II

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

Configure ACL to block ICMP mask replies.

ICX(config)#enable egress-acl-on-cpu-traffic
ICX(config)#ip access ext BLOCK_ICMP_OUT
ICX(config-ext-ipacl-BLOCK_ICMP_OUT)#deny icmp any any unreachable
ICX(config-ext-ipacl-BLOCK_ICMP_OUT)#deny icmp any any mask-reply
ICX(config-ext-ipacl-BLOCK_ICMP_OUT)#permit ip any any

Apply ACL to external interface.

ICX(config)#interface ethernet 1/1/1
ICX(config-if-e1000-1/1/1)#ip access-group BLOCK_ICMP_OUT out

Check Contents

Review configuration to determine whether outgoing ICMP mask replies are blocked on external interfaces.

enable egress-acl-on-cpu-traffic

ip access-list extended BLOCK_ICMP_OUT
sequence 10 deny icmp any any unreachable
sequence 20 deny icmp any any mask-reply
sequence 30 permit ip any any

interface ethernet 1/1/1
ip address x.0.1.2 255.255.255.252
ip access-group BLOCK_ICMP_OUT out
!

If outgoing ICMP mask replies are not blocked on external interfaces, this is a finding.

Vulnerability Number

V-273632

Documentable

False

Rule Version

RCKS-RTR-000650

Severity Override Guidance

Review configuration to determine whether outgoing ICMP mask replies are blocked on external interfaces.

enable egress-acl-on-cpu-traffic

ip access-list extended BLOCK_ICMP_OUT
sequence 10 deny icmp any any unreachable
sequence 20 deny icmp any any mask-reply
sequence 30 permit ip any any

interface ethernet 1/1/1
ip address x.0.1.2 255.255.255.252
ip access-group BLOCK_ICMP_OUT out
!

If outgoing ICMP mask replies are not blocked on external interfaces, this is a finding.

Check Content Reference

M

Target Key

5696