====== Winlink Secure Login ======
  * [[http://www.winlink.org/content/secure_login_deadline_announcement | Secure Login Deadline Announcement]]
  * Winlink 2000 secure login is supported in the client programs (not wl2kax25d) if the WL2K web mail password is configured.
    * This can be done in the wl2k.conf file, or with the command line options %%-P or --wl2k-passwd%%.
  * Thanks to Brian WB4ES for providing the patch to enable Winlink Secure Login for paclink-unix
    * This patch was applied to paclink-unix source May 2013.
  * To determine if your version of paclink-unix supports Winlink Secure Login type 'wl2ktelnet -?' and look for this line:

<file>
 -P  --wl2k-passwd   Set password for WL2K secure login
</file>

  * **Note:** enabling secure login is a 2 step process.
    * You must must first go to the Winlink site & update your Winlink account
    * You must either use a command line parameter or the config file entry for wl2k password.
===== Example config file entry ======
  * The config file exists in /usr/local/etc/wl2k.conf

<file>
# Winlink 2000 secure login password
# If you have a WL2K password and have enabled secure login,
# you must provide that password in order to successfully connect.
wl2k-password=your_password
</file>

===== Example session =====
  * An example session using wl2ktelnet & sending a Winlink message addressed to myself
  * Note the 2 consecutive lines containing **;PQ** and **Challenge received:**

==== Sending a Message ====
<file>
$ wl2ktelnet
Connecting to server.winlink.org 8772 ...
Connected.

Callsign : N7NIX
Password :
wl2ktelnet: ---
 outbound proposal list
wl2ktelnet: proposal code C type E mid C2AI5Y_n7nix usize 210 csize 157 next (nil) path C2AI5Y_n7nix ubuf 0x63120 cbuf 0x630d0
wl2ktelnet: <[WL2K-3.2-B2FWIHJM$]
wl2ktelnet: sid [WL2K-3.2-B2FWIHJM$] inboundsidcodes -B2FWIHJM$

wl2ktelnet: <;PQ: 74592872
wl2ktelnet: Challenge received: 74592872

wl2ktelnet: <Halifax CMS >
wl2ktelnet: >[UnixLINK-0.5-B2FIHM$]
wl2ktelnet: >;PR: 54040955
wl2ktelnet: >; WL2K DE N7NIX QTC 1
wl2ktelnet: >FC EM C2AI5Y_n7nix 210 157 0
wl2ktelnet: >F> F8
wl2ktelnet: <FS Y
wl2ktelnet: transmitting [test e-mail] [offset 0]
wl2ktelnet: ... 157
wl2ktelnet: <FF
wl2ktelnet: DELETING PROPOSAL: 
wl2ktelnet: proposal code C type E mid C2AI5Y_n7nix usize 210 csize 157 next (nil) path C2AI5Y_n7nix ubuf 0x63120 cbuf 0x630d0
wl2ktelnet: >FQ
</file>

==== Receiving Message ====
<file>
$ wl2ktelnet
Connecting to server.winlink.org 8772 ...
Connected.

Callsign : N7NIX
Password :
wl2ktelnet: ---

wl2ktelnet: <[WL2K-3.2-B2FWIHJM$]
wl2ktelnet: sid [WL2K-3.2-B2FWIHJM$] inboundsidcodes -B2FWIHJM$

wl2ktelnet: <;PQ: 66093856
wl2ktelnet: Challenge received: 66093856

wl2ktelnet: <SanDiego CMS >
wl2ktelnet: >[UnixLINK-0.5-B2FIHM$]
wl2ktelnet: >;PR: 23716537
wl2ktelnet: >; WL2K DE N7NIX QTC 0
wl2ktelnet: >FF
wl2ktelnet: <FC EM C2AI5Y_N7NIX 132 115 0
wl2ktelnet: proposal code C type E mid C2AI5Y_N7NIX usize 132 csize 115 next (nil) path (null) ubuf (nil) cbuf (nil)
wl2ktelnet: <F> 7B
wl2ktelnet: sentcksum=7B proposalcksum=7B
wl2ktelnet: 1 proposal received
wl2ktelnet: >FS Y
wl2ktelnet: title: test e-mail
wl2ktelnet: offset: 0
wl2ktelnet: STX
wl2ktelnet: len 115
wl2ktelnet: EOT
wl2ktelnet: extracting...
wl2ktelnet: calling sendmail for delivery: /usr/sbin/sendmail -bm webman@localhost
wl2ktelnet: delivery completed
wl2ktelnet: Finished!
wl2ktelnet: >FF
wl2ktelnet: <FQ
</file>