OpenConnect VPN client.
Description: VPN client compatible with Cisco AnyConnect SSL VPN
Keywords: OpenConnect, AnyConnect, Cisco, VPN, SSLVPN, SSL VPN

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OpenConnect VPN client

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# Changelog

For full changelog entries including the latest development, see gitweb.

- OpenConnect HEAD
  - No changelog entries yet
- OpenConnect v8.20 (PGP signature) — 2022-02-20
  - When the queue length (`-Q` option) is 16 or more, try using vhost-net to accelerate tun device access.
  - Use `epoll()` where available.
  - Support non-AEAD ciphersuites in DTLSv1.2 with AnyConnect. (#249)
  - Make `tncc-emulate.py` work with Python 3.7+. (#152, !120)
  - Emulated a newer version of GlobalProtect official clients, 5.1.5-8; was 4.0.2-19 (!131)
  - Support Juniper login forms containing both password and 2FA token (!121)
  - Explicitly disable 3DES and RC4, unless enabled with `--allow-insecure-crypto` (!114)
  - Add obsolete-server-crypto test (!114)
  - Allow protocols to delay tunnel setup and shutdown (!117)
  - Support for GlobalProtect IPv6 (!155 and !188; previous work in d6db0ec)
  - SIGUSR1 causes OpenConnect to log detailed connection information and statistics (!154)
  - Allow `--servercert` to be specified multiple times in order to accept server certificates matching more than one possible fingerprint (!162, #25)
  - Add insecure debugging build mode for developers (!112)
  - Demangle default routes sent as split routes by GlobalProtect (!118)
  - Improve GlobalProtect login argument decoding (!143)
  - Add detection of authentication expiration date, intended to allow front-ends to cache and reuse authentication cookies/sessions (!156)
  - Small bug fixes and clarification of many logging messages.
  - Support more Juniper login forms, including some SSO forms (!171)
  - Automatically build Windows installers for OpenConnect command-line interface (!176)
  - Restore compatibility with newer Cisco servers, by no longer sending them the `X-AnyConnect-Platform` header (#101, !175)
  - Add support for PPP-based protocols, currently over TLS only (!165).
  - Add support for two PPP-based protocols, F5 with `--protocol=f5` and Fortinet with `--protocol=fortinet` (!169).
  - Add experimental support for Wintun Layer 3 TUN driver under Windows (#231, !178).
  - Clean up and improve Windows routing/DNS configuration script (vpnc-scripts!26, vpnc-scripts!41, vpnc-scripts!44).
  - On Windows, reclaim needed IP addresses from down network interfaces so that configuration script can succeed (!178).
  - Fix output redirection under Windows (#229)
  - More gracefully handle idle timeouts and other fatal errors for Juniper and Pulse (!187)
  - Ignore failures to fetch the Juniper/oNCP landing page if the authentication was successful (3e779436).
  - Add support for Array Networks SSL VPN (#102)
  - Support TLSv1.3 with TPMv2 EC and RSA keys, add test cases for swtpm and hardware TPM. (ed80bfac...ee1cd782)
  - Add `openconnect_get_connect_url()` to simplify passing correct server information to the connecting `openconnect` process. (NetworkManager-openconnect #46, #53)
  - Disable brittle "system policy" enforcement where it cannot be gracefully overridden at user request. (RH#1960763).
  - Pass "portal cookie" fields from GlobalProtect portal to gateway to avoid repetition of password- or SAML-based login (!199)
  - With `--user`, enter username supplied via command-line into all authentication forms, not just the first. (#267, !220).
  - Fix a subtle bug which has prevented ESP rekey and ESP-to-TLS fallback from working reliably with the Juniper/oNCP protocol since v8.04. (#322, !293).
  - Fix a bug in `csd-wrapper.sh` which has prevented it from correctly downloading compressed Trojan binaries since at least v8.00. (!305)
  - Make Windows socketpair emulation more robust in the face of Windows's ability to break its localhost routes. (#228, #361, !320)
  - Perform proper disconnect and routes cleanup on Windows when receiving Ctrl+C or Ctrl+Break. (#362, !323)
  - Improve logging in routing/DNS configuration scripts. (!328, vpnc-scripts!45)
  - Support modified configuration packet from Pulse 9.1R14 servers (#379, !331)
- OpenConnect v8.10 (PGP signature) — 2020-05-14
  - Install bash completion script to `${datadir}/bash-completion/completions/openconnect`.
  - Improve compatibility of `csd-post.sh` trojan.
  - Update Android build dependencies and bump API level to support Android 10.
  - Fix potential buffer overflow with GnuTLS describing local certs (CVE-2020-12823).
- OpenConnect v8.09 (PGP signature) — 2020-04-29
  - Add bash completion support.
  - Give more helpful error in case of Pulse servers asking for TNCC.
  - Sanitize non-canonical Legacy IP network addresses (!97)
  - Fix OpenSSL validation for trusted but invalid certificates (CVE-2020-12105).
  - Convert `tncc-wrapper.py` to Python 3, and include modernized `tncc-emulate.py` as well. (!91)
  - Disable Nagle's algorithm for TLS sockets, to improve interactivity when tunnel runs over TCP rather than UDP. (!89
  - GlobalProtect: more resilient handling of periodic HIP check and login arguments, and predictable naming of challenge forms (!95, !93, !90)
  - Work around PKCS#11 tokens which forget to set `CKF_LOGIN_REQUIRED` (#123).
- OpenConnect v8.08 (PGP signature) — 2020-04-06
  - Fix check of `pin-sha256:` public key hashes to be case sensitive (#116).
  - Don't give non-functioning `stderr` to CSD trojan scripts.
  - Fix crash with uninitialised OIDC token.
- OpenConnect v8.07 (PGP signature) — 2020-04-04
  - Don't abort Pulse connection when server-provided certificate MD5 doesn't match.
  - Fix off-by-one in check for bad GnuTLS versions, and add build and run time checks.
  - Don't abort connection if CSD wrapper script returns non-zero (for now).
  - Make `--passtos` work for protocols that use ESP, in addition to DTLS.
  - Convert `tncc-wrapper.py` to Python 3, and include modernized `tncc-emulate.py` as well.
- OpenConnect v8.06 (PGP signature) — 2020-03-31
  - Implement EAP-TTLS fragmentation.
  - Fix Windows build with MSYS2 (#74).
  - Allow custom stoken rcfile to be specified (#71).
  - Periodic HIP checking for GlobalProtect, and cross-protocol API (!56).
  - Ciphersuite priority override options (!71).
  - Clearer GlobalProtect debugging/SAML output (!66, !69).
  - Explain experimental Pulse support for servers where Juniper oNCP is disabled (!48).
  - Ignore missing Cisco CSD stub and simply CSD subprocess invocation (!77, !74).
  - Pass `IDLE_TIMEOUT` to vpnc-script (!67).
  - Windows line-ending flexibility for standard input (!78).
  - Disable DTLS for GnuTLS versions between 3.6.3 and 3.6.13 inclusive due to GnuTLS #960.
  - Add RFC6750 Bearer token support (!70).
- OpenConnect v8.05 (PGP signature) — 2019-09-12
  - Fix GlobalProtect ESP stall (!55).
  - Fix HTTP chunked encoding buffer overflow (CVE-2019-16239).
- OpenConnect v8.04 (PGP signature) — 2019-08-09
  - Rework DTLS MTU detection. (#10)
  - Add Pulse Connect Secure support.
  - OpenSSL build fixes (!51).
  - Add HMAC-SHA256-128 (RFC4868) support for ESP.
  - Support IPv6 in ESP.
  - Translate user-visible strings from `openconnect_get_supported_protocols()`.
  - Fix proxy username/password handling to allow special characters and escaping.
- OpenConnect v8.03 (PGP signature) — 2019-05-18
  - Fix detection of `utun` support on OS X (#18).
  - Fix Cisco DTLSv1.2 support for `AES256-GCM-SHA384`.
  - Fix Solaris 11.4 build by properly detecting `memset_s()`.
  - Fix recognition of OTP password fields (#24).
- OpenConnect v8.02 (PGP signature) — 2019-01-16
  - Fix GNU/Hurd build.
  - Discover `vpnc-script` in default packaged location on FreeBSD/OpenBSD.
  - Support split-exclude routes for GlobalProtect.
  - Fix GnuTLS builds without libtasn1.
  - Fix DTLS support with OpenSSL 1.1.1+.
  - Add Cisco-compatible DTLSv1.2 support.
  - Invoke script with `reason=attempt-reconnect` before doing so.
- OpenConnect v8.01 (PGP signature) — 2019-01-05
  - Fix `memset_s()` arguments.
  - Fix OpenBSD build.
- OpenConnect v8.00 (PGP signature) — 2019-01-05
  - Clear form submissions (which may include passwords) before freeing (CVE-2018-20319).
  - Allow form responses to be provided on command line.
  - Add support for SSL keys stored in TPM2.
  - Fix ESP rekey when replay protection is disabled.
  - Drop support for GnuTLS older than 3.2.10.
  - Fix `--passwd-on-stdin` for Windows to not forcibly open console.
  - Fix portability of shell scripts in test suite.
  - Add Google Authenticator TOTP support for Juniper.
  - Add RFC7469 key PIN support for cert hashes.
  - Add protocol method to securely log out the Juniper session.
  - Relax requirements for Juniper hostname packet response to support old gateways.
  - Add API functions to query the supported protocols.
  - Verify ESP sequence numbers and warn even if replay protection is disabled.
  - Add support for PAN GlobalProtect VPN protocol (`--protocol=gp`).
  - Reorganize listing of command-line options, and include information on supported protocols.
  - SIGTERM cleans up the session similarly to SIGINT.
- OpenConnect v7.08 (PGP signature) — 2016-12-13
  - Add SHA256 support for server cert hashes.
  - Enable DHE ciphers for Cisco DTLS.
  - Increase initial oNCP configuration buffer size.
  - Reopen `CONIN$` when stdin is redirected on Windows.
  - Improve support for point-to-point routing on Windows.
  - Check for non-resumed DTLS sessions which may indicate a MiTM attack.
  - Add `TUNIDX` environment variable on Windows.
  - Fix compatibility with Pulse Secure 8.2R5.
  - Fix IPv6 support in Solaris.
  - Support DTLS automatic negotiation.
  - Support `--key-password` for GnuTLS PKCS#11 PIN.
  - Support automatic DTLS MTU detection with OpenSSL.
  - Drop support for combined GnuTLS/OpenSSL build.
  - Update OpenSSL to allow TLSv1.2, improve compatibility options.
  - Remove `--no-cert-check` option. It was being (mis)used.
  - Fix OpenSSL support for PKCS#11 EC keys without public key.
  - Support for final OpenSSL 1.1 release.
  - Fix polling/retry on "tun" socket when buffers full.
  - Fix AnyConnect server-side MTU setting.
  - Fix ESP replay detection.
  - Allow build with LibreSSL (for fetishists only; do not use this as DTLS is broken).
  - Add certificate torture test suite.
  - Support PKCS#11 PIN via `pin-value=` and `--key-password` for OpenSSL.
  - Fix integer overflow issues with ESP packet replay detection.
  - Add `--pass-tos` option as in OpenVPN.
  - Support rôle selection form in Juniper VPN.
  - Support DER-format certificates, add certificate format torture tests.
  - For OpenSSL >= 1.0.2, fix certificate validation when only an intermediate CA is specified with the `--cafile` option.
  - Support Juniper "Pre Sign-in Message".
- OpenConnect v7.07 (PGP signature) — 2016-07-11
  - More fixes for OpenSSL 1.1 build.
  - Support Juniper "Post Sign-in Message".
  - Add `--protocol` option.
  - Fix ChaCha20-Poly1305 cipher suite to reflect final standard.
  - Add ability to disable IPv6 support via library API.
  - Set groups appropriately when using `setuid()`.
  - Automatic DTLS MTU detection.
  - Support SSL client certificate authentication with Juniper servers.
  - Revamp SSL certificate validation for OpenSSL and stop supporting OpenSSL older than 0.9.8.
  - Fix handling of multiple DNS search domains with Network Connect.
  - Fix handling of large configuration packets for Network Connect.
  - Enable SNI when built with OpenSSL (1.0.1g or later).
  - Add `--resolve` and `--local-hostname` options to command line.
- OpenConnect v7.06 (PGP signature) — 2015-03-17
  - Fix `openconnect.pc` breakage after liboath removal.
  - Refactor Juniper Network Connect receive loop.
  - Fix some memory leaks.
  - Add Bosnian translation.
- OpenConnect v7.05 (PGP signature) — 2015-03-10
  - Fix alignment issue which broke LZS compression on ARM etc.
  - Support HTTP authentication to servers, not just proxies.
  - Work around Yubikey issue with non-ASCII passphrase set on pre-KitKat Android.
  - Add SHA256/SHA512 support for OATH.
  - Remove liboath dependency.
  - Support DTLS v1.2 and AES-GCM with OpenSSL 1.0.2.
  - Add OpenSSL 1.0.2 to known-broken releases (RT#3703, RT#3711).
  - Fix build with OpenSSL HEAD (OpenSSL 1.1.x).
  - Preliminary support for Juniper SSL VPN.
- OpenConnect v7.04 (PGP signature) — 2015-01-25
  - Change default behaviour to enable only stateless compression.
  - Add `--compression` argument and `openconnect_set_compression_mode()`.
  - Add support for LZS compression (compatible with latest Cisco ASA and ocserv).
  - Add support for LZ4 compression (compatible with ocserv).
- OpenConnect v7.03 (PGP signature) — 2015-01-09
  - Android build infrastructure updates, including 64-bit support.
  - Clean up handling of incoming packets.
  - Fix issue with two-stage (i.e. NetworkManager) connection to servers with trick DNS (RH#1179681).
  - Stop using static variables for received packets.
- OpenConnect v7.02 (PGP signature) — 2014-12-19
  - Add PKCS#11 support for OpenSSL.
  - Fix handling of select options in `openconnect_set_option_value().`
- OpenConnect v7.01 (PGP signature) — 2014-12-07
  - Try harder to find a PKCS#11 key to match a given certificate.
  - Handle '`Connection: close`' from proxies correctly.
  - Warn when MTU is set too low (<1280) to permit IPv6 connectivity.
  - Add support for `X-CSTP-DynDNS`, to trigger DNS lookup on each reconnect.
- OpenConnect v7.00 (PGP signature) — 2014-11-27
  - Add support for GnuTLS 3.4 `system:` keys including Windows certificate store.
  - Add support for HOTP/TOTP keys from Yubikey NEO devices.
  - Add `---no-system-trust` option to disable default certificate authorities.
  - Improve `libiconv` and `libintl` detection.
  - Stop calling `setenv()` from library functions.
  - Support `utun` driver on OS X.
  - Change library API so string ownership is never transferred.
  - Support new NDIS6 TAP-Windows driver shipped with OpenVPN 2.3.4.
  - Support using PSKC (RFC6030) token files for HOTP/TOTP tokens.
  - Support for updating HOTP token storage when token is used.
  - Support for reading OTP token data from a file.
  - Add full character set handling for legacy non-UTF8 systems (including Windows).
  - Fix legacy (i.e. not XML POST) submission of non-ASCII form entries (even in UTF-8 locales).
  - Add support for 32-bit Windows XP.
  - Avoid retrying without XML POST, when we failed to even reach the server.
  - Fix off-by-one in parameter substitution in error messages.
  - Improve reporting when GSSAPI auth requested but not compiled in.
  - Fix parsing of split include routes on Windows.
  - Fix crash on invocation with `--token-mode` but no `--token-secret`.
- OpenConnect v6.00 (PGP signature) — 2014-07-08
  - Support SOCKS proxy authentication (password, GSSAPI).
  - Support HTTP proxy authentication (Basic, Digest, NTLM and GSSAPI).
  - Download XML profile in XML POST mode.
  - Fix a couple of bugs involving DTLS rekeying.
  - Fix problems seen when building or connecting without DTLS enabled.
  - Fix tun error handling on Windows hosts.
  - Skip password prompts when using PKCS#8 and PKCS#12 certificates with empty passwords.
  - Fix several minor memory leaks and error paths.
  - Update several Android dependencies, and make the download process more robust.
- OpenConnect v5.99 (PGP signature) — 2014-03-05
  - Add RFC4226 HOTP token support.
  - Tolerate servers closing connection uncleanly after HTTP/1.0 response (Ubuntu #1225276).
  - Add support for IPv6 split tunnel configuration.
  - Add Windows support with MinGW (tested with both IPv6 and Legacy IP with latest vpnc-script-win.js)
  - Change library API to support updating the auth form when the authgroup is changed (Ubuntu #1229195).
  - Change `--os mac` to `--os mac-intel`, to match the identifier used by Cisco clients.
  - Add new API functions to support invoking the VPN mainloop directly from an application.
  - Add JNI interface and sample Java application.
  - Fix junk in `--cookieonly` output when CSD is enabled.
  - Enable TOTP, stoken, and JNI support in the Android builds.
  - Add `--pfs` option to enforce perfect forward secrecy.
  - Enable elliptic curves with GnuTLS 3.2.9+, where there is a workaround for certain firewalls that fail with client hellos between 256 and 512 bytes.
  - Add padding when sending password, to avoid leakage of password and username length.
  - Add support for DTLS 1.2 and AES-GCM when connecting to ocserv.
  - Add support for server name indication when compiled with GnuTLS 3.2.9+.
- OpenConnect v5.03 (PGP signature) — 2014-02-03
  - Fix crash on `--authenticate` due to freeing `--cafile` option in `argv`.
- OpenConnect v5.02 (PGP signature) — 2014-01-01
  - Fix XML POST issues with authgroups by falling back to old style login.
  - Fix `--cookie-on-stdin` with cookies from ocserv.
  - Fix reconnection to wrong host after redirect.
  - Reduce limit of queued packets on DTLS socket, to fix VoIP latency.
  - Fix Solaris build breakage due to missing `<string.h>` includes.
  - Include path in `<group-access>` node.
  - Include supporting CA certificates from PKCS#11 tokens (with GnuTLS 3.2.7+).
  - Fix possible heap overflow if MTU is increased on reconnection (CVE-2013-7098).
- OpenConnect v5.01 (PGP signature) — 2013-06-01
  - Attempt to handle `<client-cert-request>` in aggregate auth mode.
  - Don't include `X-Aggregate-Auth:` header in fallback mode.
  - Enable AES256 mode for DTLS with GnuTLS (RH#955710).
  - Add `--dump-http-traffic` option for debugging.
  - Be more permissive in parsing XML forms.
  - Use original URL when falling back to non-XML POST mode.
  - Add `--no-xmlpost` option to revert to older, compatible behaviour.
  - Close connection before falling back to non-xmlpost mode (RH#964650).
  - Improve error handling when server closes connection (Debian #708928).
- OpenConnect v5.00 (PGP signature) — 2013-05-15
  - Use GnuTLS by default instead of OpenSSL.
  - Avoid using deprecated `gnutls_pubkey_verify_data()` function.
  - Fix compatibility issues with XML POST authentication.
  - Fix memory leaks on `realloc()` failure.
  - Fix certificate validation problem caused by hostname canonicalisation.
  - Add RFC6238 TOTP token support using liboath.
  - Replace `--stoken` option with more generic `--token-mode` and `--token-secret` options.
- OpenConnect v4.99 (PGP signature) — 2013-02-07
  - Add `--os` switch to report a different OS type to the gateway.
  - Support new XML POST format.
  - Add SecurID token support using libstoken.
- OpenConnect v4.08 (PGP signature) — 2013-02-13
  - Fix overflow on HTTP request buffers (CVE-2012-6128)
  - Fix connection to servers with round-robin DNS with two-stage auth/connect.
  - Impose minimum MTU of 1280 bytes.
  - Fix some harmless issues reported by Coverity.
  - Improve `"Attempting to connect..."` message to be explicit when it's connecting to a proxy.
- OpenConnect v4.07 (PGP signature) — 2012-08-31
  - Fix segmentation fault when invoked with `-p` argument.
  - Fix handling of write stalls on CSTP (TCP) socket.
- OpenConnect v4.06 (PGP signature) — 2012-07-23
  - Fix default CA location for non-Fedora systems with old GnuTLS.
  - Improve error handing when `vpnc-script` exits with error.
  - Handle PKCS#11 tokens which won't list keys without login.
- OpenConnect v4.05 (PGP signature) — 2012-07-12
  - Use correct CSD script for Mac OS X.
  - Fix endless loop in PIN cache handling with multiple PKCS#11 tokens.
  - Fix PKCS#11 URI handling to preserve all attributes.
  - Don't forget key password on GUI reconnect.
  - Fix GnuTLS v3 build on OpenBSD.
- OpenConnect v4.04 (PGP signature) — 2012-07-05
  - Fix GnuTLS password handling for PKCS#8 files.
- OpenConnect v4.03 (PGP signature) — 2012-07-02
  - Fix `--no-proxy` option.
  - Fix handling of requested vs. received MTU settings.
  - Fix DTLS MTU for GnuTLS 3.0.21 and newer.
  - Support more ciphers for OpenSSL encrypted PEM keys, with GnuTLS.
  - Fix GnuTLS compatibility issue with servers that insist on TLSv1.0 or non-AES ciphers (RH#836558).
- OpenConnect v4.02 (PGP signature) — 2012-06-28
  - Fix build failure due to unconditional inclusion of `<gnutls/dtls.h>`.
- OpenConnect v4.01 (PGP signature) — 2012-06-28
  - Fix DTLS MTU issue with GnuTLS.
  - Fix reconnect crash when compression is disabled.
  - Fix build on systems like FreeBSD 8 without `O_CLOEXEC`.
  - Add `--dtls-local-port` option.
  - Print correct error when `/dev/net/tun` cannot be opened.
  - Fix `openconnect.pc` pkg-config file not to require `zlib.pc` on systems which lack it (like RHEL5).
- OpenConnect v4.00 (PGP signature) — 2012-06-20
  - Add support for OpenSSL's odd encrypted PKCS#1 files, for GnuTLS.
  - Fix repeated passphrase retry for OpenSSL.
  - Add keystore support for Android.
  - Support TPM, and also additional checks on PKCS#11 certs, even with GnuTLS 2.12.
  - Fix library references to OpenSSL's `ERR_print_errors_cb()` when built against GnuTLS v2.12.
- OpenConnect v3.99 (PGP signature) — 2012-06-13
  - Enable native TPM support when built with GnuTLS.
  - Enable PKCS#11 token support when built with GnuTLS.
  - Eliminate all SSL library exposure through `libopenconnect`.
  - Parse split DNS information, provide `$CISCO_SPLIT_DNS` environment variable to `vpnc-script`.
  - Attempt to provide new-style MTU information to server (on Linux only, unless specified on command line).
  - Allow building against GnuTLS, including DTLS support.
  - Add `--with-pkgconfigdir=` option to `configure` for FreeBSD's benefit (fd#48743).
- OpenConnect v3.20 (PGP signature) — 2012-05-18
  - Cope with non-keepalive HTTP response on authentication success.
  - Fix progress callback with incorrect `cbdata` which caused KDE crash.
- OpenConnect v3.19 (PGP signature) — 2012-05-17
  - Add `--config` option for reading options from file.
  - Improve OpenSSL DTLS compatibility to work on Ubuntu 10.04.
  - Flush progress logging output promptly after each message.
  - Add symbol versioning for shared library (on sane platforms).
  - Add `openconnect_set_cancel_fd()` function to allow clean cancellation.
  - Fix corruption of URL in `openconnect_parse_url()` if it specifies a port number.
  - Fix inappropriate `exit()` calls from library code.
  - Library namespace cleanup — all symbols now have the prefix `openconnect_` on platforms where symbol versioning works.
  - Fix `--non-inter` option so it still uses login information from command line.
- OpenConnect v3.18 (PGP signature) — 2012-04-25
  - Fix autohate breakage with `--disable-nls`... hopefully.
  - Fix buffer overflow in banner handling.
- OpenConnect v3.17 (PGP signature) — 2012-04-20
  - Work around `time()` brokenness on Solaris.
  - Fix interface plumbing on Solaris 10.
  - Provide `asprintf()` function for (unpatched) Solaris 10.
  - Make `vpnc-script` mandatory, like it is for `vpnc`
  - Don't set Legacy IP address on tun device; let `vpnc-script` do it.
  - Detect OpenSSL even without pkg-config.
  - Stop building static library by default.
  - Invoke `vpnc-script` with "pre-init" reason to load tun module if necessary.
- OpenConnect v3.16 (PGP signature) — 2012-04-08
  - Fix build failure on Debian/kFreeBSD and Hurd.
  - Fix memory leak of deflated packets.
  - Fix memory leak of zlib state on CSTP reconnect.
  - Eliminate `memcpy()` calls on packets from DTLS and tunnel device.
  - Use `I_LINK` instead of `I_PLINK` on Solaris to plumb interface for Legacy IP.
  - Plumb interface for IPv6 on Solaris, instead of expecting `vpnc-script` to do it.
  - Refer to vpnc-script and help web pages in openconnect output.
  - Fix potential crash when processing libproxy results.
  - Be more conservative in detecting libproxy without pkg-config.
- OpenConnect v3.15 (PGP signature) — 2011-11-25
  - Fix for reading multiple packets from Solaris tun device.
  - Call `bindtextdomain()` to ensure that translations are found in install path.
- OpenConnect v3.14 (PGP signature) — 2011-11-08
  - Move executable to `$prefix/sbin`.
  - Fix build issues on OSX, OpenIndiana, DragonFlyBSD, OpenBSD, FreeBSD & NetBSD.
  - Fix non-portable `(void *)` arithmetic.
  - Make more messages translatable.
  - Attempt to make NLS support more portable (with fewer dependencies).
- OpenConnect v3.13 (PGP signature) — 2011-09-30
  - Add `--cert-expire-warning` option.
  - Give visible warning when server dislikes client SSL certificate.
  - Add localisation support.
  - Fix build on Debian systems where `dtls1_stop_timer()` is not available.
  - Fix libproxy detection.
  - Enable a useful set of compiler warnings by default.
  - Fix various minor compiler warnings.
- OpenConnect v3.12 — 2011-09-12
  - Fix DTLS compatibility with ASA firmware 8.4.1(11) and above.
  - Fix build failures on GNU Hurd, on systems with ancient OpenSSL, and on Debian.
  - Add `--pid-file` option.
  - Print SHA1 fingerprint with server certificate details.
- OpenConnect v3.11 — 2011-07-20
  - Add `Android.mk` file for Android build support
  - Add logging support for Android, in place of standard `syslog()`.
  - Switch back to using TLSv1, but without extensions.
  - Make TPM support optional, dependent on OpenSSL ENGINE support.
- OpenConnect v3.10 — 2011-06-30
  - Switch to using GNU autoconf/automake/libtool.
  - Produce shared library for authentication.
  - Improve library API to make life easier for C++ users.
  - Be more explicit about requiring `pkg-config`.
  - Invoke script with `reason=reconnect` on CSTP reconnect.
  - Add `--non-inter` option to avoid all user input.
- OpenConnect v3.02 — 2011-04-19
  - Install man page in `make install` target.
  - Add `openconnect_vpninfo_free()` to libopenconnect.
  - Clear cached `peer_addr` to avoid reconnecting to wrong host.
- OpenConnect v3.01 — 2011-03-09
  - Add libxml2 to pkg-config requirements.
- OpenConnect v3.00 — 2011-03-09
  - Create libopenconnect.a for GUI authentication dialog to use.
  - Remove auth-dialog, which now lives in the network-manager-openconnect package.
  - Cope with more entries in authentication forms.
  - Add `--csd-wrapper` option to wrap CSD trojan.
  - Report error and abort if CA file cannot be opened.
- OpenConnect v2.26 — 2010-09-22
  - Fix potential crash on relative HTTP redirect.
  - Use correct TUN/TAP device node on Android.
  - Check client certificate expiry date.
  - Implement CSTP and DTLS rekeying (both by reconnecting CSTP).
  - Add `--force-dpd` option to set minimum DPD interval.
  - Don't print `webvpn` cookie in debug output.
  - Fix host selection in NetworkManager auth dialog.
  - Use SSLv3 instead of TLSv1; some servers (or their firewalls) don't accept any `ClientHello` options.
  - Never include address family prefix on `script-tun` connections.
- OpenConnect v2.25 — 2010-05-15
  - Always validate server certificate, even when no extra `--cafile` is provided.
  - Add `--no-cert-check` option to avoid certificate validation.
  - Check server hostname against its certificate.
  - Provide text-mode function for reviewing and accepting "invalid" certificates.
  - Fix libproxy detection on NetBSD.
- OpenConnect v2.24 — 2010-05-07
  - Forget preconfigured password after a single attempt; don't retry infinitely if it's failing.
  - Set `$CISCO_BANNER` environment variable when running script.
  - Better handling of passphrase failure on certificate files.
  - Fix NetBSD build (thanks to Pouya D. Tafti).
  - Fix DragonFly BSD build.
- OpenConnect v2.23 — 2010-04-09
  - Support "Cisco Secure Desktop" trojan in NetworkManager auth-dialog.
  - Support proxy in NetworkManager auth-dialog.
  - Add `--no-http-keepalive` option to work around Cisco's incompetence.
  - Fix build on Debian/kFreeBSD.
  - Fix crash on receiving HTTP 404 error.
  - Improve workaround for server certificates lacking SSL_SERVER purpose, so that it also works with OpenSSL older than 0.9.8k.
- OpenConnect v2.22 — 2010-03-07
  - Fix bug handling port numbers above 9999.
  - Ignore "`Connection: Keep-Alive`" in HTTP/1.0 to work around server bug with certificate authentication.
  - Handle non-standard port (and full URLs) when used with NetworkManager.
  - Cope with relative redirect and form URLs.
  - Allocate HTTP receive buffer dynamically, to cope with arbitrary size of content.
  - Fix server cert SHA1 comparison to be case-insensitive.
  - Fix build on Solaris and OSX (`strndup()`, `AI_NUMERICSERV`).
  - Fix exit code with `--background` option.
- OpenConnect v2.21 — 2010-01-10
  - Fix handling of HTTP 1.0 responses with keepalive (RH#553817).
  - Fix case sensitivity in HTTP headers and hostname comparison on redirect.
- OpenConnect v2.20 — 2010-01-04
  - Fix use-after-free bug in NetworkManager authentication dialog (RH#551665).
  - Allow server to be specified with `https://` URL, including port and pathname (which Cisco calls 'UserGroup')
  - Support connection through HTTP and SOCKS proxies.
  - Handle HTTP redirection with port numbers.
  - Handle HTTP redirection with IPv6 literal addresses.
- OpenConnect v2.12 — 2009-12-07
  - Fix buffer overflow when generating useragent string.
  - Cope with idiotic schizoDNS configurations by not repeating DNS lookup for VPN server on reconnects.
  - Support DragonFlyBSD. Probably.
- OpenConnect v2.11 — 2009-11-17
  - Add IPv6 support for FreeBSD.
  - Support "split tunnel" mode for IPv6 routing.
  - Fix bug where client certificate's MD5 was only given to the CSD trojan if a PKCS#12 certificate was used.
- OpenConnect v2.10 — 2009-11-04
  - OpenSolaris support.
  - Preliminary support for IPv6 connectivity.
  - Fix session shutdown on exit.
  - Fix reconnection when TCP connection is closed.
  - Support for "Cisco Secure Desktop" idiocy.
  - Allow `User-Agent:` to be specified on command line.
  - Fix session termination on disconnect.
  - Fix recognition of certificates from OpenSSL 1.0.0.
- OpenConnect v2.01 — 2009-06-24
  - Fix bug causing loss of DTLS (and lots of syslog spam about it) after a CSTP reconnection.
  - Don't apply OpenSSL certificate chain workaround if we already have "extra" certificates loaded (e.g. from a PKCS#12 file).
  - Load "extra" certificates from `.pem` files too.
  - Fix SEGV caused by freeing certificates after processing cert chain.
- OpenConnect v2.00 — 2009-06-03
  - Add OpenBSD and FreeBSD support.
  - Build with OpenSSL-0.9.7 (Mac OS X, OpenBSD, etc.)
  - Support PKCS#12 certificates.
  - Automatic detection of certificate type (PKCS#12, PEM, TPM).
  - Work around OpenSSL trust chain issues (RT#1942).
  - Allow PEM passphrase to be specified on command line.
  - Allow PEM passphrase automatically generated from the `fsid` of the file system on which the certificate is stored.
  - Fix certificate comparisons (in NM auth-dialog and `--servercert` option) to use SHA1 fingerprint, not signature.
  - Fix segfault in NM auth-dialog when changing hosts.
- OpenConnect v1.40 — 2009-05-27
  - Fix validation of server's SSL certificate when NetworkManager runs openconnect as an unprivileged user (which can't read the real user's trust chain file).
  - Fix double-free of DTLS Cipher option on reconnect.
  - Reconnect on SSL write errors
  - Fix reporting of SSL errors through syslog/UI.
- OpenConnect v1.30 — 2009-05-13
  - NetworkManager auth-dialog will now cache authentication form options.
- OpenConnect v1.20 — 2009-05-08
  - DTLS cipher choice fixes.
  - Improve handling of authentication group selection.
  - Export more information to connection script.
  - Add `--background` option to dæmonize after connection.
  - Detect TCP connection closure.
- OpenConnect v1.10 — 2009-04-01
  - NetworkManager UI rewrite with many improvements.
  - Support for "UserGroups" where a single server offers multiple configurations according to the URL used to connect.
- OpenConnect v1.00 — 2009-03-18
  - First non-beta release.