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XCCDF
Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide
SRG-OS-000480-GPOS-00227
TOSS must not send Internet Control Message Protocol (ICMP) redirects.
TOSS must not send Internet Control Message Protocol (ICMP) redirects.
An XCCDF Rule
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TOSS must not send Internet Control Message Protocol (ICMP) redirects.
Medium Severity
ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages contain information from the system's route table, possibly revealing portions of the network topology. There are notable differences between Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6). There is only a directive to disable sending of IPv4 redirected packets. Refer to RFC4294 for an explanation of "IPv6 Node Requirements", which resulted in this difference between IPv4 and IPv6.