6.40rc18 changelog:

*) conntrack - fixed IPv6 connection tracking enable/disable;
*) defconf - added IPv6 default firewall configuration (IPv6 package must be enabled on reset);
*) defconf - improved IPv4 default firewall configuration;
*) fastpath - improved performance when packets for slowpath are received;
*) hotspot - added "address-list" support in "walled-garden" IP section;
*) ike1 - added support for "framed-pool" RADIUS attribute;
*) ike1 - kill phase1 instead of rekey if "mode-config" is used;
*) ike1 - removed SAs on DPD;
*) ike1 - send phase1 delete;
*) ike2 - added RADIUS attributes "Framed-Pool", "Framed-Ip-Address", "Framed-Ip-Netmask";
*) ike2 - added support for "mode-config" static address;
*) ike2 - prefer traffic selector with "mode-config" address;
*) l2tp - fixed handling of pre-authenticated L2TP sessions with CHAP authentication;
*) log - improved "l2tp" logs;
*) log - optimized "wireless,info" topic logs;
*) lte - improved SMS delivery report;
*) ppp - improved MLPPP packet forwarding performance;
*) socks - fixed crash while processing many simultaneous sessions;
*) tr069-client - fixed lost HTTP header on authorization;
*) wireless - allow VirutalAP on Level0 (24h demo) license;
Download the new 'RouterOS 6.40rc18 released' over the torrent network: https://www.mikrotik.com/download/routeros-ALL-6.40rc18.torrentOtherwise please visit https://www.mikrotik.com/download/changelogs