6.43rc51 changelog:

MAJOR CHANGES IN v6.43:
----------------------
!) api - changed authentication process (https://wiki.mikrotik.com/wiki/Manual:API#Initial_login);
!) backup - do not encrypt backup file unless password is provided;
!) btest - requires at least v6.43 Bandwidth Test client when connecting to v6.43 or later version server except when authentication is not required;
!) cloud - added IPv6 support;
!) cloud - added support for licensed CHR instances (including trial);
!) cloud - reworked "/ip cloud ddns-enabled" implementation (suggested to disable service and re-enable after installation process);
!) mac-telnet - require at least v6.43 MAC Telnet client when connecting to v6.43 or later version server;
!) radius - use MS-CHAPv2 for "login" service authentication;
!) romon - require at least v6.43 RoMON agent when connecting to v6.43 or later RoMON client device;
!) webfig - improved authentication process;
!) winbox - improved authentication process excluding man-in-the-middle possibility;
!) winbox - minimal required version is v3.15;
----------------------

Changes in this release:

*) bridge - added per-port based "tag-stacking" feature;
*) bridge - fixed "ingress-filtering", "frame-types" and "tag-stacking" value storing;
*) bridge - improved bridge port state changing process;
*) bridge - improved packet processing when bridge port changes states;
*) bridge - renamed option "vlan-protocol" to "ether-type";
*) certificate - do not allow to perform "undo" on certificate changes;
*) crs3xx - added command that forces fan detection on fan-equipped devices;
*) crs3xx - fixed port disable on CRS326 and CRS328 devices;
*) dhcpv6-client - allow to set "default-route-distance";
*) dhcpv6-client - fixed "add-default-route" parameter;
*) dhcpv6-client - fixed option handling;
*) dhcpv6-server - added additional RADIUS parameters for Prefix delegation, "rate-limit" and "life-time";
*) ethernet - fixed default ethernet advertise values after configuration reset (introduced in v6.43rc33)
*) filesystem - fixed NAND memory going into read-only mode (requires "factory-firmware" >= 3.41.1 and "current-firmware" >= 6.43);
*) health - fixed voltage measurements for RB493G devices;
*) hotspot - allow to properly configure Hotspot directory on external disk for devices that have flash type storage;
*) hotspot - fixed RADIUS CoA & PoD by allowing to accept "NAS-Port-Id";
*) ike1 - added unsafe configuration warning for main mode with pre-shared-key authentication;
*) ike1 - zero out reserved bytes in NAT-OA payload;
*) ike2 - fixed rekeyed child deletion during another exchange;
*) ike2 - improved basic exchange logging readability;
*) ipsec - fixed "sa-src-address" deduction from "src-address" in tunnel mode;
*) ipsec - fixed "static-dns" value storing (CLI only);
*) ipsec - fixed AES-CTR and AES-GCM key size proposing as initiator;
*) ldp - properly load LDP configuration;
*) led - fixed default LED configuration for RBLHGG-5acD-XL devices;
*) lte - added "registration-status" parameter under "/interface lte info" command;
*) lte - added additional D-Link PIDs;
*) lte - added additional low endpoint SIM7600 PIDs;
*) lte - added signal readings under "/interface lte scan" for 3G and GSM modes;
*) lte - fixed memory leak on USB disconnect;
*) lte - fixed SMS send feature when not in LTE network;
*) lte - ignore empty MAC addresses during Passthrough discovery phase;
*) lte - properly detect interface state when running for IPv6 only connection for R11e-LTE modem;
*) multicast - allow to add more than one RP per IP address for PIM;
*) ospf - improved link-local LSA flooding;
*) rb1100ahx4 - added DES and 3DES hardware acceleration support;
*) routerboot - removed RAM test from TILE devices (routerboot upgrade required);
*) sfp - hide "sfp-wavelength" parameter for RJ45 transceivers;
*) snmp - added "phy-rate" reading for "station-bridge" mode;
*) snmp - fixed "remote-cap" peer MAC address format;
*) ssh - strengthen strong-crypto (add aes-128-ctr and disallow hmac sha1 and groups with sha1);
*) tile - added DES and 3DES hardware acceleration support;
*) w60g - added distance measurement feature;
*) w60g - fixed random disconnects;
*) w60g - improved MCS rate detection process;
*) w60g - improved MTU change handling;
*) w60g - properly close connection with station on disconnect;
*) wireless - fixed "/interface wireless sniffer packet print follow" output;
*) wireless - fixed packet processing after removing wireless interface from CAP settings;

Other changes since v6.42.6:

*) backup - added support for new backup file encryption (AES128-CTR) with signatures (SHA256);
*) backup - generate proper file name when devices identity is longer than 32 symbols;
*) bridge - add dynamic CAP interface to tagged ports if "vlan-mode=use-tag" is enabled;
*) bridge - added ingress filtering options to bridge interface;
*) bridge - added initial Q-in-Q support;
*) bridge - fixed bridge hw-offloading on MMIPS devices (introduced in v6.43rc10);
*) bridge - fixed dynamic VLAN table entries when using ingress filtering;
*) bridge - improved performance when bridge VLAN filtering is used without hardware offloading;
*) capsman - allow to change "radio-name" (CLI only);
*) capsman - increase timeout for the CAP to CAPsMAN communication;
*) certificate - added "expires-after" parameter;
*) check-installation - improved system integrity checking;
*) chr - added checksum offload support for Hyper-V installations;
*) chr - added large send offload support for Hyper-V installations;
*) chr - added multiqueue support on Xen installations;
*) chr - added support for multiqueue feature on "virtio-net";
*) chr - added virtual Receive Side Scaling support for Hyper-V installations (might require more RAM assigned than in previous versions);
*) chr - by default enable link state tracking for virtual drivers with "/interface ethernet disable-running-check=no";
*) chr - do not show IRQ entries from removed devices;
*) chr - fixed interface name assign process when running CHR on Hyper-V;
*) chr - fixed interface name order when "virtio-net is not being used on KVM installations;
*) chr - fixed MTU changing process when running CHR on Hyper-V;
*) chr - fixed NIC hotplug for "virtio-net";
*) chr - improved balooning process;
*) chr - improved boot time for Hyper-V installations;
*) chr - provide part of network interface GUID at the beginning of "bindstr2" value when running CHR on Hyper-V;
*) chr - reduced RAM memory required per interface;
*) console - do not show spare parameters on ping command;
*) crs317 - fixed Ethernet inteface stuck on 100 Mbps speed;
*) crs326/crs328 - fixed broken "new-dst-port" ACL rules (introduced in 6.43rc10);
*) crs326/crs328 - fixed untagged packet forwarding through tagged ports when pvid=1;
*) crs328 - fixed transmit on sfp-sfpplus1 and sfp-sfpplus2 interfaces;
*) crs3xx - added initial Q-in-Q hardware offloading support (CLI only);
*) crs3xx - do not report SFP interface as running when interface on opposite side is disabled;
*) crs3xx - fixed ACL rate rules (introduced in v6.41rc27);
*) crs3xx - fixed flow control;
*) crs3xx - fixed packet forwarding on SFP+ interfaces (introduced in v6.43rc11);
*) crs3xx - fixed tagged packet forwarding in 802.1ad aware bridges (introduced in 6.43rc13);
*) crs3xx - fixed VLAN filtering when there is no tagged interface specified;
*) defconf - fixed missing bridge ports after configuration reset;
*) dhcp - added dynamic IPv4/IPv6 "dual-stack" simple queue support, based on client's MAC address;
*) dhcp - reduced resource usage of DHCP services;
*) dhcpv4-client - fixed DHCP client that was stuck on invalid state;
*) dhcpv4-client - fixed double ACK packet handling;
*) dhcpv4-server - added "allow-dual-stack-queue" implementation (CLI only);
*) dhcpv4-server - do not allow override lease "always-broadcast" value based on offer type;
*) dhcpv4-server - fixed DHCP server functionality (introduced in v6.43rc);
*) dhcpv4-server - improved performance when "rate-limit" and/or "address-list" setting is present;
*) dhcpv6 - improved reliability on IPv6 DHCP services;
*) dhcpv6-client - added missing "Server identifier" parameter in release message;
*) dhcpv6-server - added "allow-dual-stack-queue" implementation (CLI only);
*) dhcpv6-server - added initial dynamic simple queue support;
*) dude - fixed client auto upgrade (broken since 6.43rc17);
*) ethernet - do not show "combo-state" field if interface is not SFP or copper;
*) ethernet - improved stability when changing ethernet interface L2MTU on CRS328-24P-4S+ (introduced in v6.43rc11);
*) ethernet - properly handle Ethernet interface default configuration;
*) export - do not show w60g password on "hide-sensitive" type of export;
*) filesystem - improved software crash handling on devices with FLASH type memory;
*) health - improved speed of health measurement readings;
*) ike1 - purge both SAs when timer expires;
*) ike2 - use "/32" netmask by default on initiator if not provided by responder;
*) interface - improved interface "last-link-down-time" and "last-link-up-time" values;
*) interface - improved reliability on dynamic interface handling;
*) ipsec - added "responder" parameter for "mode-config" to allow multiple initiator configurations;
*) ipsec - added "src-address-list" parameter for "mode-config" that generates dynamic "src-nat" rule (CLI only);
*) ipsec - added warning messages for incorrect peer configuration;
*) ipsec - do not allow removal of "proposal" and "mode-config" entries that are in use;
*) ipsec - improved invalid policy handling when a valid policy is uninstalled;
*) ipsec - improved reliability on generated policy addition when IKEv1 or IKEv2 used;
*) ipsec - install all DNS server addresses provided by "mode-config" server;
*) ipsec - separate phase1 proposal configuration from peer menu;
*) ipsec - use monotonic timer for SA lifetime check;
*) kidcontrol - allow to edit discovered devices;
*) led - improved w60g alignment trigger;
*) log - fixed false log warnings about system status after power on for CRS328-4C-20S-4S+;
*) log - show interface name on OSPF "different MTU" info log messages;
*) lte - added additional ID support for SIM7600 modem;
*) lte - added eNB ID to info command;
*) lte - added extended LTE signal info for SIM7600 modules;
*) lte - added extended signal information for Quectel LTE EC25 and EP06 modem;
*) lte - added ICCID reading for info command R11e-LTE and R11e-LTE-US (CLI only);
*) lte - added roaming status reading for info command (CLI only);
*) lte - added support for alternative SIM7600 PID;
*) lte - added support for Novatel USB730LN modem with new ID;
*) lte - added support for Quanta 1k6e modem;
*) lte - allow to execute concurrent internal AT commands;
*) lte - allow to use multiple PLS modems at the same time;
*) lte - do not allow to remove default APN profile;
*) lte - do not allow to send "at-chat" commands for configless modems;
*) lte - expose GPS channel for PLS modems;
*) lte - fixed SIM7600 registration info;
*) lte - improved modem event processing;
*) lte - improved r11e-LTE and r11e-LTE-US dialling process;
*) lte - improved r11e-LTE configuration exchange process;
*) lte - improved reading of SMS message after entering running state;
*) lte - improved readings of info command results for the SXT LTE;
*) lte - improved stability of USB LTE interface detection process;
*) lte - renamed LTE scan tool field "scan-code" to "mcc-mnc" (CLI only);
*) lte - show UICC in correct format for SXT LTE devices;
*) lte - use "/32" address for the Passthrough feature when R11e-LTE module is used;
*) lte - use alphanumeric operator format in info command;
*) ntp - allow to specify link-local address for NTP server;
*) package - do not allow to install out of bundle package if it already exists within bundle;
*) package - renamed "current-version" to "installed-version" under "/system package install";
*) ppp - added support for additional ID for E3531 modem;
*) ppp - show comments from "/ppp secrets" menu within "/ppp active" menu when client is connected;
*) quickset - recognize 160 MHz channel as HomeAP mode;
*) romon - fixed RoMON services becoming unavailable after disabled once during active scanning process;
*) romon - properly classify RoMON sessions in log and active users list;
*) routerboard - allow to fill up to half of the RAM memory with files on devices with FLASH storage;
*) routerboard - fixed "protected-routerboot" feature (introduced in v6.42);
*) routerboard - fixed wrongly reported RAM size on ARM devices;
*) sfp - fixed DDM data with SFP+ modules on CRS328-4C-20S-4S+ (introduced in v6.43rc10);
*) sfp - fixed default advertised link speeds;
*) smb - fixed valid request handling when additional options are used;
*) sms - converted "keep-max-sms" feature to "auto-erase";
*) sms - do not require "port" and "interface" parameters when sending SMS if already present in configuration;
*) sms - improved reliability on SMS reader;
*) snmp - added CAPsMAN "remote-cap" table;
*) ssh - disconnect all active connections when device gets rebooted or turned off;
*) supout - added "w60g" section to supout file;
*) switch - added support for port isolation by switch chip;
*) swos - implemented "/system swos" menu that allows to upgrade, reset, save or load configuration and change address for dual-boot CRS devices (CLI only);
*) tr069-client - fixed setting of "DeviceInfo.ProvisioningCode" parameter;
*) usb - fixed modem initialisation on LtAP mini;
*) usb - fixed power-reset for hAP ac^2 devices;
*) user - all passwords are now hashed and encrypted, plaintext passwords are kept for downgrade (will be removed in later upgrades);
*) userman - fixed compatibility with PayPal TLS 1.2;
*) vrrp - fixed VRRP packet processing on VirtualBox and VMWare hypervisors;
*) vrrp - improved reliability on VRRP interface configured as a bridge port when "use-ip-firewall" is enabled;
*) watchdog - added "ping-timeout" setting;
*) webfig - properly display time interval within Kid Control menu;
*) webfig - properly show NTP clients "last-adjustment" value;
*) winbox - added "poe-fault" LED trigger;
*) winbox - added "secondary-channel" setting to wireless interface if 80 MHz mode is selected;
*) winbox - added bridge Fast Forward statistics counters;
*) winbox - fixed arrow key handling within table filter fields;
*) winbox - fixed bridge port MAC learning parameter values;
*) winbox - properly close session when uploading multiple files to the device at the same time;
*) winbox - properly display all flags for bridge host entries;
*) winbox - removed duplicate "20/40/80MHz" value from "channel-width" setting options;
*) winbox - show "Switch" menu on hAP ac^2 devices;
*) winbox - show "System/RouterBOARD/Mode Button" on devices that has such feature;
*) winbox - show HT MCS tab when "5ghz-n/ac" band is used;
*) wireless - added option for RADIUS "called-station-id" format selection;
*) wireless - do not disconnect clients when WDS master connects with MAC address "00:00:00:00:00:00";
*) wireless - fixed wireless interface lockup after period of inactivity;
*) wireless - improved Nv2 reliability on ARM devices;
*) wireless - improved Nv2 stability for 802.11n interfaces on RB953, hAP ac and wAP ac devices;
*) wireless - updated "germany 5.8 ap" and "germany 5.8 fixed p-p" regulatory domain information;
*) x86 - improved Ethernet driver for Davicom DM9x0x;

Download the new 'RouterOS 6.43rc51' version here: https://www.mikrotik.com/download