1 This file documents the major additions and syntax changes between releases.
5 check_snmp's performance data now also includes warning/critical
7 New check_snmp "-N" option to specify SNMPv3 context name
8 New check_nt "-l" parameters: seconds|minutes|hours|days
9 Make sure check_disk won't hang on hanging (network) file systems
10 New check_mailq -s option which tells the plugin to use sudo(8)
11 New -W/-C option for check_ldap to check number of entries (Gerhard Lausser)
14 Let check_real terminate lines with CRLF when talking to the server, as
16 Fix check_procs on HP-UX
19 The format of the performance data emitted by check_mrtgtraf has been
20 changed to comply with the development guidelines
21 check_ssh not returns CRITICAL for protocal/version errors
23 2.1.1 2nd December 2014
25 Fix check_ntp's jitter checking
26 Fix check_ntp's handling of invalid server responses
27 Fix check_apt's handling of invalid regular expressions
28 Fix check_real's server response processing
29 Fix backslash escaping in check_tcp's --help output
33 New check_hpjd -p option for port specification (abrist)
34 New ./configure --with-qmail-qstat-command option to specify the path to
36 New check_ifstatus -n option to ignore interfaces by name
37 check_ntp_peer has now specific state output for each metric
38 New check_mysql -n option to ignore authentication failures
39 Added IP and port or socket name to error messages
40 New check_ntp_time -o option to add expected offset
41 check_disk shows now troubled partions in verbose mode
42 check_dig has now support for drill and dig
43 check_dig has now support for -6 option
44 Add performance data to check_file_age
47 Fix check_jabber to work with Openfire servers
48 Fix check_oracle bad string matching when testing TNS server
49 Fixed check_ifstatus performance data output
50 Fixed expire time output for sslutils
51 check_dns now verifies if the answer is returning from the queried
53 Fix check_by_ssh to accept --hostname as argument
56 This release doesn't ship with an RPM spec file, please contribute to
57 PR #1283 if you are interested in it
61 check_mailq now supports auto detection of qmail, postfix, exim and nullmailer with
63 check_ide_smart now defaults to plugin output, original output appended with -v
64 Extra-Opts are now enabled by default, see:
65 https://www.monitoring-plugins.org/doc/extra-opts.html
66 check_swap now supports a configurable state when there is no swap
67 check_radius now supports the FreeRADIUS Client library
68 New check_mysql_query -f option to specify a client options file
69 New check_mysql_query -g option to specify a client options group
70 Add performance data to check_mysql_query
71 New check_file_age -i/--ignore-missing option to return OK on nonexistent files
72 Make check_ping, check_users, and check_disk work on Windows
73 New check_ssh -P option to specify the expected SSH protocol version
74 check_dns now emits the warning and critical thresholds with the performance data
77 Don't let e.g. check_http's -C option reset SSL version if e.g. -S 1 -C 5 is specified
78 Don't have check_http's -N option expect an argument
79 check_ide_smart could disable offline auto tests but could not re-enable them.
80 For this reason all SMART command modes have been disabled.
81 check_dig: fix wrong IPv6 arguments order (Stéphane Bortzmeyer)
82 check_dig: make sure not to give up too early when a timeout is specified with -t
83 check_log: don't stumble over log lines that include a "%" character
84 check_nt: add UPTIME to perfdata
85 Handle SNMPv3 noAuthNoPriv properly with check_snmp
86 Fix compilation with GnuTLS
89 New default installation prefix: /usr/local instead of /usr/local/nagios
90 check_snmp now evaluates negative values properly, which means it might return CRITICAL
91 in cases where it used to return OK. If this is undesired, the warning/critical
92 threshold(s) must be fixed by specifying e.g. ~:100 instead of 100
93 check_procs now ignores its parent process to avoid unexpected results when invoked via
95 utils.sh no longer defines ECH
96 check_ide_smart -q/--quiet and -n/--nagios (Nagios-compatible output) are now deprecated
97 but accepted for backward-compatibility
98 check_ide_smart -0/--auto-off, -1/--auto-on and -i/--immediate: options have
99 been disabled because they were broken
100 State retention: the NAGIOS_PLUGIN_STATE_DIRECTORY environment variable has been
101 renamed MP_STATE_PATH. The old variable will continue to work in v2.0.x
102 Add the UID of the invoking user to the state retention file path. This helps solving
103 permission issues when different users run the same plugin
104 check_swap used to allow returning OK on a system without swap when only percent thresholds
105 were used. This is no longer the case and one must now use -n/--no-swap=<state>
106 The Perl and Shell plugins now use the PATH specified via ./configure's --trusted-path
107 option, or "/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin" by default
111 New check_dbi plugin for checking an (SQL) database using DBI
112 Let OpenSSL load its configuration file (see the OPENSSL_config(3) man page)
113 Add performance data to check_apt
114 Add performance data to check_procs
115 Added -4/-6 options to check_dig (Ville Mattila)
116 New check_oracle --connect option to perform real login
117 New check_nagios -t option to override the default timeout
118 New check_disk -f/--freespace-ignore-reserved option to ignore space reserved for root
119 New check_disk -N/--include-type option to limit the filesystem types to check
120 Allow for building the plugins in parallel
121 Add --without-{dbi,ldap,radius} options to ./configure
122 Made Verbose output of check_sensors compliant (Gabriele Tozzi)
123 New switch -E/--extended-perfdata for check_http to print additional performance data (Sebastian Nohn)
124 New check_http -d option to specify a string to expect within the response headers
125 New check_http -J/-K options for client certificate authentication support
126 Add support for executing queries to check_pgsql
127 Let check_pgsql accept a UNIX socket directory as hostname
128 New check_pgsql -o option to specify additional connection parameters
129 New check_fping -S option to specify the source IP address
130 New check_fping -I option to specify the interface to bind to
131 Let check_fping support IPv6
132 New check_procs -k option to ignore kernel threads (on Linux)
133 Let check_procs use /proc/<PID>/exe (if available) instead of getpid(2), unless -T is specified
134 Let check_mysql support SSL
135 Let check_mysql add perfromance metrics for all checks
136 New check_mysql -f option to specify a client options file
137 New check_mysql -g option to specify a client options group
138 New check_snmp --offset option to allow for adding/substracting an offset value to sensor data
139 Let check_snmp support an arbitrary number of OIDs
140 Let check_ide_smart support NetBSD
143 Change the MAIL FROM command generated by check_smtp to be RFC compliant
144 Fix compilation of check_http without SSL support
145 Fix check_snmp reversed threshold ranges (backward-compatibility)
146 Fix check_snmp memory violation when using more than 8 oids (Robin Sonefors)
147 Fix check_apt security regular expression (Alex Bradley)
148 Fix check_http handling extra header (-k) containing semicolons (Richard Leitner)
149 Fix check_apt handling unknown exit codes from apt-get (Richard Leitner)
150 Fix deprecated imports of check_nmap.py (Fabio Rueda)
153 check_http behaviour of -k/--header changed since it does not seperate multiple headers by semicolons anymore. Use multiple -k switches instead.
154 check_http's --proxy_authorization option is now called --proxy-authorization (it was always documented this way)
155 The contrib directory has been removed from this distribution
157 1.4.16 27th June 2012
159 check_nt UPTIME accepts warning/critical thresholds (Ryan Kelly)
160 check_disk_smb now allows spaces in share names (#990948, #1370031, Debian #601699)
161 check_http now uses standard threshold functions (enables floating point and ranges)
162 check_http now checks for and prints the certificate cn (hostname) in SSL certificate checks (Stéphane Urbanovski)
163 check_http now supports an optional -S/--ssl value to choose the SSL protocol version (#3066166 - Jason Lunn)
164 Add perfdata to check_ssh (#3244097 - Marco Beck)
165 New option to check_smtp to ignore failures when sending QUIT (#3358348 - Duncan Ferguson)
166 New check_by_ssh -F option which allows for specifying an alternative ssh_config(5) file (#2895334 - Sven Nierlein)
167 check_sensors now detects faulty sensors unless --ignore-fault is specified (Jan Wagner)
168 utils.sh now provides a check_range function (Alex Griffin)
169 Improved the performance of check_users (Marc Remy)
170 Add perfdata to check_disk_smb (Debian #654259 - Charles-Henri Larose)
171 Updated Nagios::Plugin perl module
172 Add warning threshold to certificate expiration checks of check_tcp/http/smtp (William Leibzon)
173 Add --perf-oids option for check_snmp (Jochen Bern)
176 Fix check_disk free space calculation if blocksizes differ within a disk group (Bekar - #2973603)
177 check_disk_smb now handles NT_STATUS_ACCESS_DENIED properly (Debian #601696)
178 Make check_snmp work more like v1.4.14 with regard to using special values (Timeticks, STRING) as numeric thresholds
179 Fix check_ldap overriding the port when --ssl was specified after -p
180 Fix check_procs where regex input of '|' would get displayed in output - now replaced with ','
181 Fix segfault in check_host when hostname returns multiple IP addresses (Sebastian Harl)
182 Fix check_smtp and check_tcp where duplicate messages were displayed for certificate errors
183 Fix check_ping's parsing of ping6(1) output (#1894850, Debian #514588, Debian #662638 - Matej Vela)
184 Fix a check_dhcp bug which was triggered by checking Windows 2003 DHCP servers (#3503921)
185 Disable RFC4507 support, to work around SSL negotiation issues with (at least) some Tomcat versions
186 Fix performance data label containing spaces in check_snmp (Jochen Bern)
188 1.4.15 27th July 2010
190 New check_ntp_peer -m and -n options to check the number of usable time sources ("truechimers")
191 New check_disk_smb -a option which allows for specifying the IP address of the remote server
192 New check_radius -N option which allows for specifying the value of the NAS-IP-Address attribute
193 New check_snmp --rate option to store differences between invocations. Saves state in PREFIX/var/{plugin}
194 check_snmp -l label option now also changes the perfdata label. See WARNINGS
195 check_snmp has an --invert-search option which reverses status of the string and regexp searches
196 check_http now displays the missing search string and the URL in the output when failed (Duncan Ferguson - #2999924)
197 Updated Nagios::Plugin perl module
198 Updated gnulib to June 2010
201 Fix check_ircd binding to wrong interface (#668778)
202 Add proxy-authorization option to check_http (Marcel Kuiper - #1323230, Bryan Irvine - #2863925)
203 check_icmp now increment the sequence counter in each packet
204 Fix usage of repeated -o options in check_snmp
205 Try to detect arguments passed via --with-ping[6]-command and set options accordingly (#2908236)
206 Fix memory leak in check_http for large pages (Jimmy Bergman - #2957455)
207 Fix compilation with GCC 2.96 (Konstantin Khomoutov - #2977105)
208 Fix regression introduced in #1867716 where partially valid performance strings would not be printed anymore
209 Fix regression in check_http ssl checks on some servers - make SNI an option
210 Fix guest mode support in check_disk_smb
211 Fix check_disk_smb and check_ircd failures when run via ePN
212 check_ldap now allows for specifying an empty LDAP base
213 Fix compilation error of pst3 in Solaris 8
214 Fix check_radius returning OK on unexpected results (Craig Leres - #2911752)
215 Fix translations when extra-opts aren't enabled (Jan Wagner - #2832884)
216 Fix parsing of multi-line strings in check_snmp (broken in 1.4.14) and enhance output in such case (#2832451)
217 Fix detection of pst3 64-bit compile flags with Sun CC
218 Fix cmd_run overwriting the environment, which would break some commands that needed it
219 Allow check_ifstatus to accept version=2c - used to only allow version=2 (Brian Landers)
220 Fix examples in check_disk, where it implied was possible to suffix unit values to warn/crit parameters
223 Updated developer documentation to say that performance labels should not have an equals sign or
224 single quote in the label
225 check_http 1.4.14 introduced SSL SNI support - you now have to enable it explicitly with "--sni"
226 check_snmp -l label option is also used for the performance label. This could change history from previous uses
228 1.4.14 16th September 2009
229 check_http has options to specify the HTTP method (#2155152)
230 check_users thresholds were not working exactly as documented (>= rather than >)
231 Updated tinderbox_build script to point to new tinderbox server
232 check_ifoperstatus -n flag now works as expected (sf.net #1569488)
233 check_ifoperstatus now supports ifType based lookup for ifIndex
234 check_ups now sends a LOGOUT string (debian bug #387001)
235 Extra-opts (C plugins) now allows both '#' and ';' for comments (like N::P)
236 Extra-opts (C plugins) does not allow trailing comments anymore (like N::P)
237 Fixed dependency issue on libtap when ./configure --enable-libtap used. Warning: will install libtap
238 Fixed segfault in extra-opts under some circumstance when reading multiple sections
239 Fix long options parsing in check_disk, check_dns, check_mrtg, check_mrtgtraf and check_tcp
240 Add missing long options for check_nt (for use with extra-opts)
241 check_icmp now reports min and max round trip time perfdata (Steve Rader)
242 Fixed check_http bug where additional headers with redirection caused a segfault (Dieter Van de Walle - 2089159)
243 check_disk: make autofs mount paths specified with -p before we determine the mount list (Erik Welch)
244 Fixed buffer overflow in check_ntp/check_ntp_peer (#1999319, Ubuntu #291265)
245 Re-bundled libtap as a built-in library (--enable-libtap): detects system library as pre-1.4.13 and does not install the built-in library anymore
246 Fixed check_mrtg returning UNKNOWN instead of OK (bug #2378068)
247 Fixed check_http behaviour: all check are now performed as long as a valid response is returned (sf.net #1460312)
248 check_http --onredirect=sticky follows using the same IP address (sf.net #2550208)
249 check_http --onredirect=stickyport also follows the same port
250 Fixed coredump from check_nt when invalid drive is specified (#2179754 - Olli Hauer)
251 Fixed crash from check_nt when -H unspecified or given multiple times (sf.net #2731755, debian #521097)
252 Fixed passing of quotes in OID for check_snmp (#1985230 - Jan Wagner, patch by John Barbuto)
253 Fixed check_http sending HTTP/1.0 with v1.1 headers (#2638765)
254 Fixed check_http not timing-out on redirects
255 Fixed negate not printing the real timeout in ALRM handler when left to default
256 negate timeout result is now configurable
257 Fixed segfault in check_mysql with old slaves (#2696823 - Oskar Ahner)
258 check_nt can return UNKNOWN on timeouts (-u)
259 Fixed typos for check_disk (Chris Pepper)
260 Fixed check_mysql* not using password set in my.cnf (#2531905 - Ben Timby) - Specify an empty password explicitly if you need to override it.
261 Fixed awk subst.in/subst script path error (#2722832 - Martin Foster)
262 check_http: Add SSL/TLS hostname extension support (SNI) - (#1939022 - Joe Presbrey)
263 Fixed wrong perfdata label for output traffic in check_mrtgtraf (#2654308 - Gavin Williams)
264 Fixed check_by_ssh interpretation of quotes in -C parameter (#1985246, #2268675)
265 check_snmp now supports standard threshold ranges and doubles (floating numbers) in thresholds
266 check_fping now supports passing target timeout and interval to fping (#2347686 - Martin Foster)
267 Fixed SNMPv3 behaviour of check_ifoperstatus and check_ifstatus. Added -P to define privprotocol (#2343438 - Robin Schroeder)
268 check_ifoperstatus and check_ifstatus are now more user-friendly in case of missing arguments
269 pst3 compile fix for Sun Studio Compiler (Grant Byers)
271 1.4.13 25th Sept 2008
272 Fix Debian bug #460097: check_http --max-age broken (Hilko Bengen)
273 Optimised pst3 for systems with large number of processes (Duncan Ferguson)
274 Updated Nagios::Plugin to 0.27
275 Fix Debian bug #479013: check_dig's -l is mandatory now (sf.net #1986306)
276 check_dig now returns CRITICAL instead of WARNING when no answer section is found
277 check_procs now captures stderr in external command and adds to plugin output
278 check_snmp now only prints perfdata for non numeric values (#1867716)
279 check_icmp now supports packet size modification
280 check_http -e now accepts a comma-delimited list of expected status codes (Sven Nierlein)
281 libtap now included with this distribution for easier testing. Run ./configure with --enable-libtap
282 check_ntp_peer/check_ntp_time used to show port in --help but ignored the argument - now implemented
283 Fix possible segfault in check_ntp_peer with deliberately invalid packets
286 Added ./check_nt -v INSTANCES to count number of instances (Alessandro Ren)
287 New check_icmp -s option to specify the source IP address
288 check_dns now sorts addresses for testing results for more than one returned IP (Matthias Urlichs)
289 Fix segfault in check_ntp_time and (deprecated) check_ntp (Bug #1862300)
290 check_disk should now work with large file systems (2TB+) on all archs that supports it
291 Fixed check_disk disk usage calculation when using --group=NAME (related to bug #1348746)
292 Fix help text of check_ntp* (Bug #1880095)
293 Fix bugs and flaws in best offset server selection of check_ntp_time and (deprecated) check_ntp
294 check_ntp_peer now checks for the LI_ALARM flag
295 Sync to latest Gnulib (includes new floorf function)
296 check_pgsql now successfully builds with postgres lib v8.3 (Bug #1878972)
297 check_procs now accepts --ereg-argument-array for a regular expression match to the argument array
298 Reverted back to using pst3 for Solaris systems. Fixed issues re: -m64 needed to compile on 64bit systems
299 If applicable, Gettext linked dynamically instead of statically
300 check_dig can now pass arguments to dig by using -A/--dig-arguments (#1874041/#1889453)
301 check_ntp and check_ntp_peer now show proper jitter/stratum thresholds longopts in --help
302 check_dns now allow to repeat -a to match multiple possibly returned address (common with load balancers)
303 check_mysql and check_radius now try clearing password in processlist just like check_mysql_query
304 check_mysql and check_mysql_query now support sockets explicitely (-s, --socket)
305 negate now has the ability to replace the status text as well (-s, --substitute)
306 Added performance data to check_ping (Christian Schneemann)
307 Added support for --extra-opts in all C plugins (disabled by default, see configure --help)
308 Fixed passive option in check_by_ssh
309 On non-skipped stderr, check_by_ssh now returns UNKNOWN or worse (result from command) instead of always UNKNOWN.
310 Fix linking against OpenSSL where libdl is required
312 1.4.11 13th December 2007
313 Fixed check_http regression in 1.4.10 where following redirects to
314 relative URLs on virtual hosts failed if both "-H" and "-I" were used
315 Merged two new checks that deprecates check_ntp: check_ntp_peer and check_ntp_time.
316 You should read the --help output so see which one is suitable for you. check_ntp_peer
317 implement stratum thresholds support (feature request #1703823).
318 check_ntp now returns UNKNOWN instead of WARNING if jitter is unavailable (jitter=-1.000000)
319 as long as the thresholds range include -1. If no offset threshold is specified
320 and the offset is unavailable, will return UNKNOWN as well.
321 NOTE: If jitter thresholds are specified as integers it will return CRITICAL if jitter
322 is "-1" as the default range starts at 0. See Examples in --help output.
323 Fixed broken usage2 in check_snmp and check_cluster
324 check_cluster now accepts all valid characters in its thresholds ("-", "@", "~")
325 Fixed check_disk reporting OK if disk usage grows over 100% (bug #1348746).
326 The problem happens to be in Gnulib but a workaround have been implemented in check_disk.c
327 Fixed check_load argument handling when not passing triplets (bug #1831890)
328 Fixed buffer overflow in check_snmp (CVE-2007-5623)
329 Tinderbox builds now runs tests in a verbose mode
330 Updated Nagios::Plugin to 0.22
331 VPATH problem fixed for compiling plugins-root
333 1.4.10 28th September 2007
334 Fix check_http buffer overflow vulnerability when following HTTP redirects (CVE-2007-5198)
335 check_http now explicitly asks HTTP/1.1 servers to close the connection
336 after completion of the response
337 Check_ldaps' guessing which secure method to use (starttls vs. ssl on connect)
338 is now deprecated. See --help for further information.
339 Check_disk now calls stat() on all filesystems to check. (Old: only the ones selected using -p)
340 A meaningful error message (eg "Stale NFS Handle") is printed if stat fails.
341 New check_disk option -L: Only check local filesystems, but call stat() on remote ones, too.
342 Thus accessibility of remote filesystems can be checked without any threshold comparison.
343 Check_disk's --help now prints some examples for the new features introduced in 1.4.8
344 New check_disk -i/-I option to ignore pathes/partitions based on regular expressions
345 New check_disk -A option to select all filesystems explicitly
346 WARNING: check_disk's -E option must now be passed before -p or -r/-R arguments
347 Passing -E after -p or -r results in UNKNOWN state, now
348 This is needed due to the new ignore feature
349 Fix check_disk bug when mixing case sensitive and case insensitive regex arguments
350 New check_dhcp -u/--unicast option for emulating a DHCP relay in order
351 to check DHCP servers on remote networks
352 New check_dhcp -m/--mac option which allows for specifying the MAC
353 address to use in the DHCP request
354 The check_dhcp -r and -s options now accept host names, too
355 Fix possible check_icmp bus errors on some (non-x86/AMD64) platforms
356 Fix check_smtp's handling of multiple-packet server responses
357 WARNING: Fix for negate which may break existing commands:
358 - stop evaluating command line options through shell twice
359 - enforce a full path for the command to run
360 The "negate" utility can now remap custom states
361 Check_radius now supports radiusclient-ng
362 The (undocumented) positional parameter parsing which check_radius used
363 instead of getopt(3) if 8 arguments were given is no longer available
364 Check_by_ssh now supports multiline output
365 IPv6 support can now be disabled using ./configure --without-ipv6
366 Fix check_ntp now honor ntp flags
369 Inclusion of contrib/check_cluster2 as check_cluster with some improvements
370 New/improved -E/--skip-stderr and -S/--skip-stdout options for check_by_ssh
371 check_snmp now supports Counter64
372 Fix compilation of check_ldap, check_radius and check_pgsql
373 check_load can optionally divide by number of cpus
374 Fix check_time returning wrong OK when time is before the epoch on some arch
375 Make check_http output more consistent
376 Fix possible check_http segfaults when following HTTP redirects
377 check_snmp don't warn anymore if something is printed on stderr
378 Fix check_tcp segfault when multiple expect strings are given
379 New option for check_tcp: -A/--all to test if all given expect strings match
381 1.4.8 11th April 2007
382 Respects --without-world-permissions for setuid plugins
383 check_disk extra options for regex matching of filesystems and grouping of filesystems
384 for collective thresholds
385 Better configure test for mysqlclient availability
386 Various check_ntp fixes
388 1.4.7 29th March 2007
389 check_procs uses /usr/ucb/ps if available - fixes pst3 problems on Solaris
390 Fixed MKINSTALLDIRS problem in po/
391 ./configure now detects if possible to compile check_mysql
392 Fixed broken HELO in check_smtp
393 check_icmp now allows to set a minimum number of hosts required for successs (-m)
394 check_icmp fix for *BSD when running for long time
395 check_ping times out 1 second quicker if host is unreachable
396 Root plugins installed with world executable
397 check_sybase from contrib now maintained in MonitoringExchange
398 --with-nagios-user/group reinstated ./configure option
399 New --without-world-permissions ./configure option
401 1.4.6 5th February 2007
402 Reduced number of DNS lookups in check_ping and netutils.c for IPv6 configurations
403 Fixed compile problems with *BSD re: alloca.h
404 Fixed Solaris problems with check_swap (tested on Solaris 9)
405 Fixed check_swap for HP/UX where swapinfo command was incorrect
406 Fixed check_disk inode threshold checks, regressed at r1.4.4.
407 Fixed crit/warn for check_disk perf data
408 Fixed buffer overflow in check_procs
409 Fixed error handling for UNIX sockets in netutils.c
410 New -q and -o options for check_by_ssh which are handed over to ssh(1) as is
411 Synced with latest GNUlib
412 Fixed check_jabber always returns warning
415 Fixed bug in perl's is_hostname routine
418 New C based check_ntp. The perl version is now deprecated.
420 Notice: plugins in contrib/ will start to be removed from this distribution.
421 Please check at http://www.monitoringexchange.org for contributed plugins
422 Major bug fixes to check_disk where values were incorrectly calculated and alerted on.
423 check_udp2 removed. check_udp is now linked to check_tcp.c
424 check_mailq now errors if the sub-program run returns non-zero return code. This would appear
425 as if mailqs were okay when the nagios user could not query the mail-queues
426 Compile problems with check_snmp fixed
429 Setuid plugins (check_dhcp, check_icmp) separated into plugins-root/. Run make install as root to install
430 SSL plugins work with gnutls as well as OpenSSL
431 check_mysql_query added to run arbitrary SQL commands, with threshold checking
432 libtool now required for development systems
433 Notice: check_udp (compiled from check_udp.c) will be deprecated in the next release.
434 check_udp2 should be used instead and will be renamed to check_udp
437 Fix for Redhat ES4 for check_dns and check_dig
440 IPv6 support in check_ping, check_by_ssh, check_http, check_ldap, check_smtp, check_tcp
441 Internationalisation support
442 Performance data added to most plugins
443 check_disk now using GNU coreutils code
444 New plugins - check_dhcp, check_icmp
445 contrib/check_citrix has been replaced by contrib/check_ica* (requires packet_utils.pm in libexec)
446 check_http --min changed to --pagesize, added max so min:max in check
447 check_vsz and check_rss deprecated - functionality moved into check_procs
448 check_swap % thresholds changed to measure amount free, instead of amount used
449 check_disk syntax changes for -p, -m/-M, defaults to MB instead of kB
450 check_procs -C expects no path for the command name