TSB Alternatives to Ipv6 Application servers at boundary of public network, translate to private network but these gateways can limit functionality NATing, VPNS, private spaces, but may force re-numbering NATing limits peer-to-peer applications IPsec requires end-to-end10 TSB Alternatives to IPv6 • Application servers at boundary of public network, translate to private network, but these gateways can limit functionality • NATing, VPNs, private spaces, but may force re-numbering – NATing limits peer-to-peer applications – IPsec requires end-to-end