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Microsoft's Skype for business servers block(ed?) ICMPv6. That was a fun one to track down when there was an MTU issue on our network, especially when their dia

by r1ch 9y ago

Microsoft's Skype for business servers block(ed?) ICMPv6. That was a fun one to track down when there was an MTU issue on our network, especially when their diagnostic tool claimed there was a 403 error from the SIP endpoint!