6.42 changelog:

*) bridge - added host aging timer for CRS3xx and Atheros hw-bridges;
*) bridge - added per-port forwarding options for broadcasts, unknown-multicasts and unknown-unicasts;
*) bridge - added per-port learning options;
*) bridge - added support for static hosts;
*) bridge - fixed "master-port" configuration conversion from pre-v6.41 RouterOS versions;
*) bridge - fixed bridge port interface parameter under "/interface bridge host print detail";
*) bridge - fixed false MAC address learning on hAP ac^2 and cAP ac devices;
*) bridge - fixed incorrect "fast-forward" enabling when ports were switched;
*) bridge - fixed MAC learning for VRRP interfaces on bridge;
*) bridge - fixed reliability on software bridges when used on devices without switch chip;
*) bridge - hide options for disabled bridge features in CLI;
*) bridge - show "hw" flags only on Ethernet interfaces and interface lists;
*) capsman - added "allow-signal-out-of-range" option for Access List entries;
*) capsman - added support for "interface-list" in Access List and Datapath entries;
*) capsman - improved CAPsMAN responsiveness with large amount of CAP interfaces;
*) capsman - log "signal-strength" when successfully connected to AP;
*) certificate - added PKCS#10 version check;
*) certificate - dropped DES support and added AES instead for SCEP;
*) certificate - dropped MD5 support and require SHA1 as minimum for SCEP;
*) certificate - fixed incorrect SCEP URL after an upgrade;
*) chr - added "open-vm-tools" on VMware installations;
*) chr - added "qemu-guest-agent" and "virtio-scsi" driver on KVM installations;
*) chr - added "xe-daemon" on Xen installations;
*) chr - added support for Amazon Elastic Network Adapter (ENA) driver;
*) chr - added support for booting from NVMe disks;
*) chr - added support for Hyper-V ballooning, guest quiescing, host-guest file transfer, integration services and static IP injection;
*) chr - added support for NIC hot-plug on VMware and Xen installations;
*) chr - fixed additional disk detaching on Xen installations;
*) chr - fixed interface matching by name on VMware installations;
*) chr - fixed interface naming order when adding more than 4 interfaces on VMware installations;
*) chr - fixed suspend on Xen installations;
*) chr - make additional disks visible under "/disk" on Xen installations;
*) chr - make Virtio disks visible under "/disk" on KVM installations;
*) chr - run startup scripts on the first boot on AWS and Google Cloud installations;
*) console - fixed "idpr-cmtp" protocol by changing its value from 39 to 38;
*) console - improved console stability after it has not been used for a long time;
*) crs1xx/2xx - added BPDU value for "ingress-vlan-translation" menu "protocol" option;
*) crs212 - fixed Ethernet boot when connected to boot server through CRS326 device;
*) crs326 - fixed known multicast flooding to the CPU;
*) crs3xx - added switch port "storm-rate" limiting options;
*) crs3xx - added “hw-offload” support for 802.3ad and “balance-xor” bonding;
*) detnet - fixed "detect-internet" feature unavailability if router had too long identity (introduced in v6.41);
*) dhcp - improved DHCP service reliability when it is configured on bridge interface;
*) dhcp - reduced resource usage of DHCP services;
*) dhcpv4-server - added "dns-none" option to "/ip dhcp-server network dns";
*) dhcpv6 - make sure that time is set before restoring bindings;
*) dhcpv6-client - added info exchange support;
*) dhcpv6-client - added possibility to specify options;
*) dhcpv6-client - added support for options 15 and 16;
*) dhcpv6-client - implement confirm after reboot;
*) dhcpv6-server - added DHCPv4 style user options;
*) dns - do not generate "Undo" messages on changes to dynamic servers;
*) email - set maximum number of sessions to 100;
*) fetch - added "http-content-type" option to allow setting MIME type of the data in free text form;
*) fetch - added "output" option for all modes in order to return result to file, variable or ignore it;
*) fetch - increased maximum number of sessions to 100;
*) filesystem - implemented additional system storage maintenance checks on ARM CPU based devices;
*) flashfig - properly apply configuration provided by Flashfig;
*) gps - improved NMEA sentence handling;
*) health - added log warning when switching between redundant power supplies;
*) health - fixed empty measurements on CRS328-24P-4S+RM;
*) hotspot - improved HTTPS matching in Walled Garden rules;
*) ike1 - display error message when peer requests "mode-config" when it is not configured;
*) ike1 - do not accept "mode-config" reply more than once;
*) ike1 - fixed wildcard policy lookup on responder;
*) ike2 - fixed framed IP address received from RADIUS server;
*) interface - improved interface configuration responsiveness;
*) ippool - added ability to specify comment;
*) ippool6 - added pool name to "no more addresses left" error message;
*) ipsec - fixed AES-CTR and AES-GCM support on RB1200;
*) ipsec - improved single tunnel hardware acceleration performance on MMIPS devices;
*) ipsec - properly detect interface for "mode-config" client IP address assignment;
*) ipv6 - fixed IPv6 behaviour when bridge port leaves bridge;
*) ipv6 - update IPv6 DNS from RA only when it is changed;
*) kidcontrol - initial work on "/ip kid-control" feature;
*) led - added "Dark Mode" support for wAP 60G;
*) led - added w60g alignment trigger;
*) led - fixed unused "link-act-led" LED trigger on RBLHG 2nD, RBLHG 2nD-XL and RBSXTsq 2nD;
*) led - removed unused "link-act-led" trigger for devices which does not use it;
*) lte - added initial support for Quectel LTE EP06-E;
*) lte - added initial support for SIM7600 LTE modem interface;
*) lte - added support for the user and password authentication for wAP-LTE-kit-US (R11e-LTE-US);
*) lte - do not add DHCP client on LTE modems that doesn't use DHCP;
*) lte - fixed DHCP client adding for MF823 modem;
*) lte - fixed LTE band setting for SXT LTE;
*) mac-ping - fixed duplicate responses;
*) modem - added initial support for AC340U;
*) netinstall - fixed MMIPS RouterOS package description;
*) netinstall - sign Netinstall executable with an Extended Validation Code Signing Certificate;
*) netwatch - limit to read, write, test and reboot policies for Netwatch script execution;
*) poe - do not show "poe-out-current" on devices which can not determine it;
*) poe - hide PoE related properties on interfaces that does not provide power output;
*) ppp - added initial support for NETGEAR AC340U and ZyXEL WAH1604;
*) ppp - allow to override remote user PPP profile via "Mikrotik-Group";
*) quickset - fixed NAT if PPPoE client is used for Internet access;
*) quickset - properly detect IP address when one of the bridge modes is used;
*) quickset - properly detect LTE interface on startup;
*) quickset - show "G" flag for guest users;
*) quickset - use "/24" subnet for local network by default;
*) r11e-lte - improved LTE connection initialization process;
*) rb1100ahx4 - improved reliability on hardware encryption;
*) routerboard - added RouterBOOT "auto-upgrade" after RouterOS upgrade (extra reboot required);
*) routerboard - properly detect hAP ac^2 RAM size;
*) sniffer - fixed "/tool sniffer packet" results listed in incorrect order;
*) snmp - added "/caps-man interface print oid";
*) snmp - added "/interface w60g print oid";
*) snmp - added "board-name" OID;
*) snmp - improved request processing performance for wireless and CAP interfaces;
*) ssh - fixed SSH service becoming unavailable;
*) ssh - generate SSH keys only on the first connect attempt instead of the first boot;
*) ssh - improved key import error messages;
*) ssh - remove imported public SSH keys when their owner user is removed;
*) switch - hide "ingress-rate" and "egress-rate" for non-CRS3xx switches;
*) tile - added "aes-ctr" hardware acceleration support;
*) tr069-client - added "DownloadDiagnostics" and "UploadDiagnostics";
*) tr069-client - correctly return “TransferComplete” after vendor configuration file transfer;
*) tr069-client - fixed "/tool fetch" commands executed with ".alter" script;
*) tr069-client - fixed HTTPS authentication process;
*) traffic-flow - fixed IPv6 destination address value when IPFIX protocol is used;
*) upgrade - improved RouterOS upgrade process and restrict upgrade from RouterOS older than v5.16;
*) ups - improved communication between router and UPS;
*) ups - improved disconnect message handling between RouterOS and UPS;
*) userman - added support for ARM and MMIPS platform;
*) w60g - added "tx-power" setting (CLI only);
*) w60g - added RSSI information (CLI only);
*) w60g - added TX sector alignment information (CLI only);
*) watchdog - retry to send "autosupout.rif" file to an e-mail if initial delivery failed up to 3 times within 20 second interval;
*) winbox - added "antenna" setting under GPS settings for MIPS platform devices;
*) winbox - added "crl-store" setting to certificate settings;
*) winbox - added "insert-queue-before" to DHCP server;
*) winbox - added "use-dn" setting in OSPF instance General menu;
*) winbox - added 160 MHz "channel-width" to wireless settings;
*) winbox - added DHCPv6 client info request type and updated statuses;
*) winbox - added missing protocol numbers to IPv4 and IPv6 firewall;
*) winbox - added possibility to delete SMS from inbox;
*) winbox - allow to comment new object without committing it;
*) winbox - allow to open bridge host entry;
*) winbox - fixed name for "out-bridge-list" parameter under bridge firewall rules;
*) winbox - fixed typo from "UPtime" to "Uptime";
*) winbox - fixed Winbox closing when viewing graph which does not contain any data;
*) winbox - improved stability when using trackpad scrolling in large lists;
*) winbox - made UDP local and remote TX size parameters optional in Bandwidth Test tool;
*) winbox - moved "ageing-time" setting from STP to General tab;
*) winbox - moved OSPF instance "routing-table" setting in OSPF instance General menu;
*) winbox - removed “VLAN” section from “Switch” menu for CRS3xx devices;
*) winbox - show Bridge Port PVID column by default;
*) winbox - show CQI in LTE info;
*) winbox - show dual SIM options only for RouterBOARDS which does have two SIM slots;
*) winbox - show only master CAP interfaces under CAPsMAN wireless scan tool;
*) winbox - use proper graph name for HDD graphs;
*) wireless - added "realm-raw" setting for "/interface wireless interworking-profiles" (CLI only);
*) wireless - added initial support for "nstreme-plus";
*) wireless - added support for "band=5ghz-n/ac";
*) wireless - added support for "interface-list" for Access List entries;
*) wireless - added support for legacy AR9485 chipset;
*) wireless - enable all chains by default on devices without external antennas after configuration reset;
*) wireless - fixed "wds-slave" channel selection when single frequency is specified;
*) wireless - fixed incompatibility with macOS clients;
*) wireless - fixed long "scan-list" entries not working for ARM based wireless interfaces;
*) wireless - fixed nv2 protocol on ARM platform SXTsq devices;
*) wireless - fixed RB911-5HnD low transmit power issue;
*) wireless - fixed RTS/CTS option for the ARM based wireless devices;
*) wireless - fixed wsAP wrong 5 GHz interface MAC address;
*) wireless - improved compatibility with specific wireless AC standard clients;
*) wireless - improved Nv2 PtMP performance;
*) wireless - improved packet processing on ARM platform devices;
*) wireless - improved wireless performance on hAP ac^2 devices while USB is being used;
*) wireless - improved wireless scan functionality;

Download the new 'RouterOS 6.42' version here: https://www.mikrotik.com/download