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https://community.cisco.com/t5/other-security-subjects/why-doesnt-ipsec-support-multicast-traffic/td-p/157915
not be able to authenticate which system sent the multicast traffic. Specifications for other, more general multicast cases are deferred. to later IPsec documents. Sorry to quote RFC's at you, but we simply follow the standard and the standard didn't support this.
https://learningnetwork.cisco.com/thread/95756
Nov 14, 2019 · I read that multicast communication is not possible in site-to-site IPsec VPN hence we go for IPsec VPN with GRE. Why IPsec won't support multicast ? 95756
https://itknowledgeexchange.techtarget.com/itanswers/multicast-over-ipsec/
Nov 14, 2014 · IPsec. Networking. Why IPsec tunnel does not support multicast traffic, why we have to use GRE traffic? Asked: November 14, 2014 9:33 PM Last updated: November 17, 2014 2:02 PM . Related Questions. Loss of VoIP traffic on QoS enabled WAN; Inbound traffic is coming from router IP, not internet IP. Why? No internet since VPN running ...Author: Vissoni
https://networkengineering.stackexchange.com/questions/44774/which-vpn-types-protocols-inherently-support-multicast-traffic
IKE is (in massively simplified terms/practically explained) just a way of establishing an IPSec VPN tunnel, and IPSec VPN tunnels don't inherently support multicast. You can put a GRE tunnel inside of an IPSec VPN tunnel which will support multicast, and other non-IP Layer 3 protocols, like apple talk, IPX, and NHRP, which explains why DMVPN ...
https://security.stackexchange.com/questions/85915/ipsec-on-multicast
IPsec on multicast. Ask Question Asked 4 years, 7 months ago. Active 4 years, 7 months ago. Viewed 2k times 5. I am trying to implement IPSec for multicast communication, I tried strongSwan for setting up IPSec for unicast but it doesn't support any standard for multicast ipsec as listed here https: //wiki ...
https://www.ietf.org/mail-archive/web/ipsec/current/msg00994.html
Nov 18, 2004 · >> >> >>if you need only to move the multi-cast or broadcast traffic between two >>IPsec implementations, then yes, this is simple and does not require >>special, multi-cast support from IPsec. Under 2401 you could use IPsec >>tunnel mode and just specify the addresses in the SPD to encompass the >>multi-cast or broadcast traffic addresses.
https://www.cisco.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike-protocols/41940-dmvpn.html
Jan 04, 2006 · GRE tunnels do support transporting IP multicast and broadcast packets to the other end of the GRE tunnel. The GRE tunnel packet is an IP unicast packet, so the GRE packet can be encrypted using IPsec. In this scenario, GRE does the tunneling work and IPsec does the encryption part of supporting the VPN network.
http://kietfurivpn.buzz/VpnIpsecDoes/Ipsec-Vpn-Does-Not-Support-Multicast.bing
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