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diff --git a/services/telnetd/include/passwd.h b/services/telnetd/include/passwd.h
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+/* Define a default password for telnetd here.
+ * NOTES:
+ * - this can be overridden at run-time by setting
+ * the "TELNETD_PASSWD" environment variable.
+ * As soon as that variable is set, the new password
+ * is effective - no need to restart telnetd.
+ * - this must be set to an _encrypted_ password, NOT
+ * the cleartext. Use the 'genpw' utility to generate
+ * a password string:
+ *
+ * 1) Compile 'genpw.c' for the HOST, i.e.
+ * cc -o genpw genpw.c -lcrypt
+ * 1) delete an old password definition from this file.
+ * 2) run './genpw >> passwd.h'. This will append
+ * a new definition to this file.
+ *
+ * - if no password is defined here, no authentication
+ * is needed, i.e. telnet is open to the world.
+ *
+ * T. Straumann <strauman@slac.stanford.edu>
+ */
+
+/* #undef TELNETD_DEFAULT_PASSWD */
+/* Default password: 'rtems' */
+#define TELNETD_DEFAULT_PASSWD "tduDcyLX12owo"