300-730 Exam Dumps - Cisco CCNP Security Questions and Answers

The same-security-traffic intra-interface command lets traffic enter and exit the same interface, which is normally not allowed. This feature might be useful for VPN traffic that enters an interface, but is then routed out the same interface. The VPN traffic might be unencrypted in this case, or it might be reencrypted for another VPN connection. For example, if you have a hub and spoke VPN network, where the security appliance is the hub, and remote VPN networks are spokes, for one spoke to communicate with another spoke, traffic must go into the security appliance and then out again to the other spoke.

https://www.cisco.com/c/en/us/support/docs/security/adaptive-security-appliance-asa-software/215442-configure-anyconnect-management-vpn-tunn.html

IKE Message from X.X.X.X Failed its Sanity Check or is Malformed

This debug error appears if the pre-shared keys on the peers do not match. In order to fix this issue, check the pre-shared keys on both sides.

1d00H:%CRPTO-4-IKMP_BAD_MESSAGE: IKE message from 198.51.100.1 failed its

sanity check or is malformed

https://www.cisco.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike-protocols/5409-ipsec-debug-00.html#anc17

https://www.cisco.com/c/en/us/support/docs/security/dynamic-multipoint-vpn-dmvpn/111976-dmvpn-troubleshoot-00.html

The MMNOSTATE failure occurs when the ISAKMP policy priority values are not configured correctly on both devices. The ISAKMP policy priority values are used to determine the order in which the ISAKMP policies are applied. If the priority values do not match between the two devices, the ISAKMP tunnel may not be established correctly, resulting in the MMNOSTATE failure. To resolve this issue, the engineer should ensure that the ISAKMP policy priority values are configured correctly on both the router and the peer.

The first of the two TS payloads is known as TSi (Traffic Selector- initiator). The second is known as TSr (Traffic Selector-responder). TSi specifies the source address of traffic forwarded from (or the destination address of traffic forwarded to) the initiator of the Child SA pair. https://www.rfc-editor.org/rfc/rfc5996#page-40

If the responder's policy does not allow it to accept any part of the proposed Traffic Selectors, it responds with a TS_UNACCEPTABLE Notify message.