rfc9611v3.txt   rfc9611.txt 
skipping to change at line 352 skipping to change at line 352
to the SAD requires access to the key material, whereas updating the to the SAD requires access to the key material, whereas updating the
CPU selector on an existing outbound SAs might not require access to CPU selector on an existing outbound SAs might not require access to
key material. To support this, the IKE software might have to hold key material. To support this, the IKE software might have to hold
on to the key material longer than it normally would, as it might on to the key material longer than it normally would, as it might
actively attempt to destroy key material from memory that the IKE actively attempt to destroy key material from memory that the IKE
daemon no longer needs access to. daemon no longer needs access to.
An implementation that does not accept any further resource-specific An implementation that does not accept any further resource-specific
Child SAs MUST NOT return the NO_ADDITIONAL_SAS error because it Child SAs MUST NOT return the NO_ADDITIONAL_SAS error because it
could be misinterpreted by the peer to mean that no other Child SA could be misinterpreted by the peer to mean that no other Child SA
with a different TSi and/or TSr is allowed either. with a different TSi and/or TSr is allowed either. Instead, it MUST
return TS_MAX_QUEUE.
7. Security Considerations 7. Security Considerations
Similar to how an implementation should limit the number of half-open Similar to how an implementation should limit the number of half-open
SAs to limit the impact of a denial-of-service attack, it is SAs to limit the impact of a denial-of-service attack, it is
RECOMMENDED that an implementation limits the maximum number of RECOMMENDED that an implementation limits the maximum number of
additional Child SAs allowed per unique TSi/TSr. additional Child SAs allowed per unique TSi/TSr.
Using multiple resource-specific child SAs makes sense for high- Using multiple resource-specific child SAs makes sense for high-
volume IPsec connections on IPsec gateway machines where the volume IPsec connections on IPsec gateway machines where the
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