6.40rc38 changelog:

*) certificate - update and reload old certificate with new one if SKID matches;
*) email - added support for multiple attachments;
*) firewall - added "none-dynamic" and "none-static" options for "address-list-timeout" parameter;
*) firewall - fixed crash on fasttrack dummy rule manual change attempt;
*) ikev2 - fixed duplicate policy checking with "0.0.0.0/0" policies;
*) lte - added initial fastpath support (except SXT LTE and Sierra modems);
*) mmips - added support for NVME disks;
*) ppp - added output values for "info" command for finding the GSM base station's location ("LAC" and "IMSI");
*) ppp - fixed "user-command" output;
*) quickset - simplified LTE status monitoring;
*) rb1100ahx4 - fixed startup problems (requires additional reboot after upgrade);
*) ssl - added Wildcard support for "left-most" DNS label (will allow to use signed Wildcard certificate on VPN servers);
*) userman - do not send disconnect request for user when "simultaneous session limit reached";
*) userman - added "/tool user-manager user clear-profiles" command;

Other changes since 6.39.2:

!) bridge - implemented software based "igmp-snooping" (untested, undocumented, CLI only);
!) bridge - implemented software based MSTP (untested, undocumented, CLI only);
!) bridge - implemented software based vlan-aware bridges;
!) switch - "master-port" conversion into a bridge with hardware offload "hw" option (undocumented, CLI only);
!) switch - CRS3xx switch VLAN configuration integrated within bridge VLAN configuration with hw-offload;
!) wireless - added Nv2 AP synchronization feature (for experimental use)(CLI only);
*) btest - fixed crash when packet size has been changed during test;
*) capsman - added "current-registered-clients" and "current-authorized-clients" count for CAP interfaces;
*) capsman - fixed EAP identity reporting in "registration-table";
*) capsman - set minimal "caps-man-names" and "caps-man-certificate-common-names" length to 1 char;
*) certificate - added "crl-use" setting to disable CRL use (CLI only);
*) chr - fixed MAC address assignment when hot plugging NIC on XenServer;
*) chr - maximal system disk size now limited to 16GB;
*) conntrack - fixed IPv6 connection tracking enable/disable;
*) console - fixed different command auto complete on ;
*) crs212 - fixed Optech sfp-10G-tx module compatibility with SFP ports;
*) defconf - added IPv6 default firewall configuration (IPv6 package must be enabled on reset);
*) defconf - improved IPv4 default firewall configuration;
*) defconf - renamed 192.168.88.1 address static DNS entry from "router" to "router.lan";
*) dhcp - added "debug" logs on MAC address change;
*) dhcpv4-client - added "gateway-address" script parameter;
*) dhcpv4-server - fixed lease renew for DHCP clients that sends renewal with "ciaddr = 0.0.0.0";
*) dhcpv4-server - fixed server state on interface change in Winbox and Webfig;
*) discovery - fixed timeouts for LLDP neighbours;
*) dns - remove all dynamic cache RRs of same type when adding static entry;
*) dude - fixed server crash;
*) ethernet - fixed forced 10Mbps full-duplex linking on 100Mbps Ethernet ports;
*) ethernet - fixed occasional broken interface order after reset/first boot;
*) ethernet - fixed rare linking problem with forced 10Mbps full-duplex mode;
*) export - added "terse" option;
*) export - added default "init-delay" setting for "/routerboard settings" menu;
*) export - added router model and serial number to configuration export;
*) export - fixed "/interface list" verbose export;
*) export - fixed "/ipv6 route" compact export;
*) export - fixed MPLS "dynamic-label-range" export;
*) export - fixed SNMP "src-address" for compact export;
*) fastpath - fixed router rebooting itself (introduced in 6.40rc24);
*) fastpath - improved performance when packets for slowpath are received;
*) fastpath - improved removing process of dynamic interface;
*) fasttrack - fixed fasttrack over interfaces with dynamic MAC address;
*) fetch - added "src-address" parameter for HTTP and HTTPS;
*) filesystem - improved error correcting process on tilera and RB1100Dx4 storage;
*) firewall - fixed bridge "action=log" rules;
*) firewall - fixed cosmetic "inactive" flag when item was disabled;
*) firewall - removed unique address list name limit;
*) hAP ac lite - removed nonexistent "wlan-led";
*) health - fixed memory leak on devices that have "/system health" menu (introduced in 6.40rc30);
*) hotspot - added "address-list" support in "walled-garden" IP section;
*) hotspot - require "dns-name" to contain "." symbol under Hotspot Server Profile configuration;
*) ike1 - added support for "framed-pool" RADIUS attribute;
*) ike1 - fixed minor memory leak on peer configuration change;
*) 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 pfkey kernel return checks;
*) ike2 - added support for "Mikrotik_Address_List" RADIUS attribute;
*) ike2 - added support for "mode-config" static address;
*) ike2 - by default use "/24" netmask for peer IP address in split net;
*) ike2 - prefer traffic selector with "mode-config" address;
*) ikev1 - added log error message if netmask was not provided by "mode-config" server;
*) ipsec - added "firewall=add-notrack" peer option (CLI only);
*) ipsec - added information in console XML for "mode-config" menu;
*) ipsec - added support for "key-id" peer identification type;
*) ipsec - do not deduct "dst-address" from "sa-dst-address" for "/0" policies;
*) ipsec - enabled modp2048 DH group by default;
*) ipsec - fixed connections cleanup on policy or proposal modification;
*) ipsec - optimized logging under IPSec topic;
*) ipsec - removed policy priority;
*) l2tp - fixed handling of pre-authenticated L2TP sessions with CHAP authentication;
*) l2tp-server - added "one-session-per-host" option;
*) log - added "poe-out" topic;
*) log - improved "l2tp" logs;
*) log - optimized "wireless,info" topic logs;
*) log - work on false CPU/RAM overclocked alarms;
*) lte - added "accounting" logs for LTE connections;
*) lte - added additional driver support for DWR-910;
*) lte - added info command support for the Jaton LTE modem;
*) lte - added initial support for "NTT DoCoMo" modem;
*) lte - added support for Huawei E3531-6;
*) lte - improved SMS delivery report;
*) lte - improved reliability on SXT LTE;
*) metarouter - fixed display of bogus error message on startup;
*) modem - added support for ZTE TE W120;
*) modem - fixed info command when it is executed at the same time as modem restarts/disconnects;
*) ovpn - added support for "push-continuation";
*) ovpn - added support for topology subnet for IP mode;
*) ovpn - fixed duplicate default gateway presence when receiving extra routes;
*) ovpn - improved performance when receiving too many options;
*) packages - increased automatic download retry interval to 5 minutes if there is no free disk space;
*) ping - fixed ping getting stuck (after several thousands of ping attempts);
*) ppp - added initial support for ZTE K4203-Z;
*) ppp - added initial support for ZTE ME3630-E;
*) ppp - improved MLPPP packet forwarding performance;
*) ppp - use interface name instead of IP as default route gateway;
*) proxy - fixed potential crash;
*) proxy - fixed rare program crash after closing client connection;
*) quickset - added "Band" setting to "CPE" and "PTP CPE" modes;
*) quickset - added special firewall exception rules for IPSec;
*) quickset - fixed incorrect VPN address value on arm and tilera;
*) quickset - use active user name and permissions when applying changes;
*) rb3011 - fixed packet passthrough on switch2 while booting;
*) rb750gr3 - fixed USB power;
*) routerboard - added "caps-mode" option for "reset-configuration" (CLI only);
*) routerboard - added "caps-mode-script" for default-configuration print;
*) routing - allow to disable "all" interface entry in BFD;
*) safe-mode - fixed session handling when Safe Mode is used on multiple sessions at the same time;
*) sms - decode reports in readable format;
*) sniffer - do not skip L2 packets when "all" interface mode was used;
*) snmp - added "ifindex" on interface traps;
*) snmp - added CAPsMAN interface statistics;
*) snmp - added ability to set "src-address";
*) snmp - fixed "/system resource cpu print oid" menu;
*) snmp - fixed crash on interface table get;
*) snmp - fixed wireless interface walk table id ordering;
*) socks - fixed crash while processing many simultaneous sessions;
*) supout - fixed IPv6 firewall section;
*) switch - fixed "loop-protect" on CRS SFP/SFP+ ports;
*) tile - fixed copying large amount of text over serial console;
*) tr069-client - fixed lost HTTP header on authorization;
*) trafficgen - added "lost-ratio" to statistics;
*) ups - show correct "line-voltage" value for usbhid UPS devices;
*) userman - lookup language files also in "/flash" directory;
*) vlan - do not delete existing VLAN interface on "failure: already have such vlan";
*) webfig - fixed wireless "scan-list" parameter not being saved after applying changes;
*) winbox - added "eap-identity" to CAPsMAN registration table;
*) winbox - added "no-dad" setting to IPv6 addresses;
*) winbox - added "reselect-channel" to CAPsMAN interfaces;
*) winbox - added "session-uptime" to LTE interface;
*) winbox - added "src-address-list" & "dst-address-list" to HotSpot Walled Garden;
*) winbox - added TR069 support;
*) winbox - do not autoscale graphs outside known maximums;
*) winbox - fixed wireless interface "amsdu-threshold" max limit;
*) winbox - hide LCD menu on CRS112-8G-4S;
*) winbox - moved LTE info fields to status tab;
*) winbox - show "/system health" only on boards that have health monitoring;
*) winbox - show "D" flag under "/interface mesh port" menu;
*) wireless - NAK any methods except MS-CHAPv2 as inner method in PEAP;
*) wireless - added option to change "nv2-downlink-ratio" for nv2 protocol;
*) wireless - added option to set "fixed-downlink" mode for nv2 protocol;
*) wireless - allow VirutalAP on Level0 (24h demo) license;
*) wireless - always use "multicast-helper" when DHCP is being used;
*) wireless - do not skip >2462 channels if interface is WDS slave;
*) wireless - fixed 802.11u wireless request processing;
*) wireless - fixed EAP PEAP success processing;
*) wireless - fixed compatibility with "AR5212" wireless chips;
*) wireless - fixed rare crash on cap disable;
*) wireless - fixed registration table "signal-strength" reporting for chains when using nv2;

Download the new 'RouterOS 6.40rc38' version here: https://www.mikrotik.com/download