What's new in 6.38 (2016-Dec-30 11:33):

Important note!!!
To avoid STP/RSTP compatibility issues with older RouterOS versions upgrade RouterOS on all routers in Layer2 networks with VLAN and STP/RSTP configurations.

!) ipsec - added IKEv1 xauth user authentication with RADIUS "/ip ipsec user settings set xauth-use-radius=yes";
!) ipsec - added IKEv2 support;
!) ipsec - added IKEv2 EAP RADIUS passthrough authentication for responder;
!) ipsec - added support for unique policy generation;
!) ipsec - removed IKEv1 ah+esp support;
!) snmp - added basic get and walk functionality "/tool snmp-[get|walk]";
!) switch - added hardware STP functionality for CRS devices and small Atheros switch chips (http://wiki.mikrotik.com/wiki/Manual:CRS_examples#Spanning_Tree_Protocol);
!) tr069-client - initial implementation (as separate package) (cli only);
!) winbox - Winbox 3.7 is the minimum version that can connect to RouterOS;
*) arp - added "local-proxy-arp" feature;
*) bonding - added "forced-mac-address" option;
*) bonding - fixed "tx-drop" on VLAN over bonding on x86;
*) bridge - fixed rare crash on bridge port removal;
*) bridge - fixed VLAN BPDU rx and tx when connected to non-RouterOS device with STP functionality;
*) bridge - require admin-mac to be specified if auto-mac is disabled;
*) bridge - show bridge port name in port monitor;
*) capsman - added "group-key-update" parameter;
*) capsman - added possibility to change arp, mtu, l2mtu values in datapath configuration;
*) capsman - fixed CAP upgrade when separate wireless package is used (introduced in 6.37);
*) capsman - use correct source address in reply to unicast discovery requests;
*) ccr - added AHCI driver for Samsung XP941 128GB AHCI M.2;
*) certificates - added support for PKCS#12 export;
*) certificates - allow import multiple certs with the same key;
*) certificates - fixed crash when crl is removed while it is being fetched;
*) certificates - fixed trust chain update on local certificate revocation in programs using ssl;
*) certificates - if no name provided create certificate name automatically from certificate fields;
*) console - fixed multi argument value unset;
*) crs - added comment ability in more switch menus;
*) crs - fixed rare kernel failure on switch reset (for example, reboot);
*) dhcp - fixed DNS server assignment to client if dynamic server exists and is from another IP family;
*) dhcp - fixed issue when dhcp-client was still possible on interfaces with "slave" flag and using slave interface MAC address;
*) dhcp - show dhcp server as invalid and log an error when interface becomes a slave;
*) dhcp-server - fixed when wizard was unable to create pool >dhcp_pool99;
*) discovery - added LLDP support;
*) discovery - removed 6to4 tunnels from "/ip neighbor discovery menu";
*) dns - added "max-concurrent-queries" and "max-concurrent-tcp-sessions" settings;
*) dude - (changes discussed here: http://forum.mikrotik.com/viewtopic.php?f=8&t=112599);
*) ethernet - added "k" and "M" unit support to Ethernet Bandwidth setting;
*) ethernet - fixed "tx-fcs-error" on SFP+ interfaces when loop-protect is enabled;
*) export - do not show interface comment in "/ip neighbor discovery" menu;
*) export - updated default values to clean up export compact;
*) fastpath - fixed rare crash;
*) fastpath - fixed x86 bridge fast-path status shown as active even if it is manually disabled;
*) file - fixed file manager crash when file transfer gets cancelled;
*) firewall - added "creation-time" to address list entries;
*) firewall - added sctp/dccp/udp-lite support for "src-port", "dst-port", "port" and "to-ports" firewall options;
*) firewall - do not defragment packets which are marked with "notrack" in raw firewall;
*) firewall - fixed "time" option by recognizing weekday properly (introduced in v6.37.2);
*) firewall - fixed dynamic raw rule behaviour;
*) firewall - fixed rule activation if "time" option is used and no other active rules are present;
*) firewall - increased max size of connection tracking table to 1048576;
*) firewall - new faster "connection-limit" option implementation;
*) firewall - significantly improved large firewall rule set import performance;
*) graphing - fixed queue graphs showing up in web interface if aggregate name size >57840 symbols;
*) health - show power consumption on devices which has voltage and current monitor;
*) hotspot - fixed nat rule port setting in "hs-unauth-to" chain by changing it from "dst-port" to "src-port" on Walled Garden ip "return" rules;
*) interface - changed loopback interface mtu to 1500;
*) interface - do not treat multiple zeros as single zero on name comparison;
*) interface - show link stats in "/interface print stats-detail" output;
*) ipsec - added ability to specify static IP address at "send-dns" option;
*) ipsec - added ph2 accounting for each policy "/ip ipsec policy ph2-count";
*) ipsec - allow to specify explicit split dns address;
*) ipsec - changed logging topic from error to debug when empty pfkey messages are received;
*) ipsec - do not auto-negotiate more SAs than needed;
*) ipsec - ensure generated policy refers to valid proposal;
*) ipsec - fixed camellia crypto algorithm module loading;
*) ipsec - fixed IPv6 remote prefix;
*) ipsec - fixed kernel failure on tile with sha256 when hardware encryption is not being used;
*) ipsec - fixed peer configuration my-id IPv4 address endianness;
*) ipsec - fixed ph2 auto-negotiation by checking policies in correct order;
*) ipsec - load ipv6 related modules only when ipv6 package is enabled;
*) ipsec - make generated policies always as unique;
*) ipsec - non passive peers will also establish SAs from policy without waiting for the first packet;
*) ipsec - optimized logging under ipsec topic;
*) ipsec - show active flag when policy has active SA;
*) ipsec - show SA "enc-key-size";
*) ipsec - split "mode-config" and "send-dns" arguments;
*) ipv6 - added "no-dad" setting to ipv6 addresses;
*) ipv6 - fixed "accept-router-advertisements" behaviour;
*) ipv6 - moved empty IPv6 pool error message to error topic;
*) lcd - improved performance, causes less cpu load;
*) led - fixed dark mode for cAP 2nD (http://wiki.mikrotik.com/wiki/Manual:System/LEDS#Leds_Setting);
*) log - fixed "System rebooted because of kernel failure" message to show after 1st crash reboot;
*) lte - added support for more Vodafone K4201-Z, Novatel USB620L, PANTECH UML295 and ZTE MF90 modems;
*) lte - allow to execute concurrent info commands;
*) lte - fixed dwm-222, Pantech UML296 support;
*) lte - fixed init delay after power reset;
*) lte - increased delay when setting sms send mode;
*) lte - return info data when all the fields are populated;
*) metarouter - fixed startup process (introduced in 6.37.2);
*) mmips - fixed traffic accounting in "/interface" menu;
*) ospf - fixed route crash caused by memory corruption when there are multiple active interfaces;
*) ppp - fixed packet size calculation when MRRU is set (was 2 bytes bigger than MTU allows);
*) ppp - significantly improved shutdown speed on servers with many active tunnels;
*) ppp - significantly improved tunnel termination process on servers with many active tunnels;
*) profile - added "bfd" and "remote-access" processes;
*) profile - added ability to monitor cpu usage per core;
*) profile - make profile work on mmips devices;
*) profile - properly classify "wireless" processes;
*) queue - fixed "time" option by recognizing weekday properly (introduced in v6.37.2);
*) radius - added IPSec service (cli only);
*) rb750Gr3 - fixed ipsec with 3des+md5 to work on this board;
*) rb850Gx2 - fixed pcb temperature monitor if temperature was above 60C;
*) resolver - ignore cache entries if specific server is used;
*) routerboot - show log message if router CPU/RAM is overclocked;
*) script - increment run count value when script is executed from snmp;
*) snmp - always report bonding speed as speed from first bonding slave;
*) snmp - fixed rare crash when incorrectly formatted packet was received;
*) snmp - provide sinr in lte table;
*) ssh - added routing-table setting (cli only);
*) ssh - fixed lost "/ip ssh" settings on upgrade from version older than 5.15;
*) system - reboot device on critical program crash;
*) tile - fixed kernel failure when when IPv6 ICMP packet is sent through PPP interface;
*) time - updated time zones;
*) traceroute - fixed memory leak;
*) traffic-flow - fixed flow sequence counter and length;
*) trafficgen - fixed compact export when "header-stack" includes tcp;
*) trafficgen - fixed crash when IPv6 traffic is processed;
*) trafficgen - fixed potential crash when very big frame is generated;
*) trafficgen - improved fastpath support;
*) tunnel - fixed transmit packets occasionally not going through fastpath;
*) tunnel - properly export keepalive value;
*) usb - fixed kernel failure when Nexus 6P device is removed;
*) users - added minimal required permission set for full user group;
*) users - added TikApp policy;
*) vlan - allow to add multiple VLANs which name starts with same number and has same length;
*) vrrp - do not show unrelated log warning messages about version mismatch;
*) watchdog - do not send supout file if "auto-send-supout" is disabled;
*) webfig - added extra protection against XSS exploits;
*) webfig - show ipv6 addresses correctly;
*) webfig - show properly interface last-link-up/down times;
*) winbox - added "Complete" flag to arp table;
*) winbox - added "untracked" option to firewall "connection-state" setting;
*) winbox - added Dude icon to Dude menu;
*) winbox - allow to enable/disable traffic flow targets;
*) winbox - allow to run profile from "/system resources" menu;
*) winbox - allow to specify interface for leds with "interface-speed" trigger;
*) winbox - do not allow to set "loop-protect-send-interval" to 0s;
*) winbox - do not show hotspot user profile incoming and outgoing filters and marks as set if there is no value specified;
*) winbox - fixed crash when legacy Winbox version was used;
*) winbox - fixed default values for interface "loop-protect-disable-time" and "loop-protect-send-interval";
*) winbox - fixed missing "IPv6/Settings" menu;
*) winbox - fixed typo in "propagate-ttl" setting;
*) winbox - make cert signing include provided ca-crl-host;
*) winbox - moved ipsec peer "exchange-mode" to General tab;
*) winbox - properly show VHT basic and supported rates in CAPsMAN;
*) winbox - removed spare values from loop-protect menu;
*) winbox - show all related HT tab settings in 2GHz-g/n mode;
*) winbox - show primary and secondary ntp addresses as 0.0.0.0 if none are set;
*) winbox - show proper ipv6 connection timeout;
*) wireless - added API command to report country-list (/interface/wireless/info/country-list);
*) wireless - added CRL checking for eap-tls;
*) wireless - fixed action frame handling for WDS nodes;
*) wireless - fixed custom channel extension-channel appearance in console;
*) wireless - fixed full "spectral-history" header print on AP modes;
*) wireless - fixed rare kernel failure when connecting to nv2 access point with legacy rate select;
*) wireless - fixed upgrade from older wireless packages when AP interface had empty SSID;
*) wireless - take in account channel width when returning supported channels;
*) wireless - use VLAN ID 0 in RADIUS message to disable VLAN tagging;