Hi! When using DOUBLE_QUOTED_STRING, passwords with '\"' may not work. Register a user in ActiveDirectory with the password "pass\"word@2022", the following LDAP settings. === # cat /usr/local/etc/raddb/mods-enabled/ldap1 ldap { server = '192.168.1.6' identity = 'cn=tkt10886-3,cn=users,dc=srv2022,dc=rdd-osaka,dc=soliton,dc=example,dc=jp' password = "pass\"word@2022" base_dn = 'dc=srv2022,dc=rdd-osaka,dc=soliton,dc=example,dc=jp' === When attempting to start the RADIUS service in this state, a syntax error occurred. ===== # /usr/local/sbin/radiusd -X FreeRADIUS Version 3.2.3 Copyright (C) 1999-2022 The FreeRADIUS server project and contributors There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE You may redistribute copies of FreeRADIUS under the terms of the GNU General Public License For more information about these matters, see the file named COPYRIGHT Starting - reading configuration files ... including dictionary file /usr/local/share/freeradius/dictionary including dictionary file /usr/local/share/freeradius/dictionary.dhcp including dictionary file /usr/local/share/freeradius/dictionary.vqp including dictionary file /usr/local/etc/raddb/dictionary including configuration file /usr/local/etc/raddb/radiusd.conf including configuration file /usr/local/etc/raddb/proxy.conf including configuration file /usr/local/etc/raddb/clients.conf including files in directory /usr/local/etc/raddb/mods-enabled/ including configuration file /usr/local/etc/raddb/mods-enabled/dynamic_clients including configuration file /usr/local/etc/raddb/mods-enabled/realm including configuration file /usr/local/etc/raddb/mods-enabled/chap including configuration file /usr/local/etc/raddb/mods-enabled/utf8 including configuration file /usr/local/etc/raddb/mods-enabled/date including configuration file /usr/local/etc/raddb/mods-enabled/exec including configuration file /usr/local/etc/raddb/mods-enabled/unix including configuration file /usr/local/etc/raddb/mods-enabled/expr including configuration file /usr/local/etc/raddb/mods-enabled/totp including configuration file /usr/local/etc/raddb/mods-enabled/always including configuration file /usr/local/etc/raddb/mods-enabled/preprocess including configuration file /usr/local/etc/raddb/mods-enabled/ldap1 /usr/local/etc/raddb/mods-enabled/ldap1[4]: Syntax error: Expected comma after 'pass\\': word@2022" Errors reading or parsing /usr/local/etc/raddb/radiusd.conf ===== We also tried several patterns and summarised the results. Password | Configration | Result -------------------|-----------------------|------- pass"word@2022 | "pass\"word@2022" | OK pass\"word@2022 | "pass\\"word@2022" | Syntax error pass\\"word@2022 | "pass\\\"word@2022" | OK pass\\\"word@2022 | "pass\\\\"word@2022" | Syntax error As mentioned above, a Syntax Error occurs when '\' is an even number in the configuration. After investigating the cause of this, it appears that there is a problem with the determination of '˶' in the following section. === /* * Convert backslash-quote to quote, but * leave everything else alone. */ if (p[1] == quote) { /* convert '\'' --> ' */ p++; } else { if (buflen < 2) { fr_strerror_printf("Truncated input"); return T_INVALID; } *(s++) = *(p++); } *(s++) = *(p++); } === This problem was solved by changing the above section as follows. === } else { /* * Convert backslash-quote to quote, but * leave everything else alone. */ if (p[1] == quote) { /* convert '\'' --> ' */ if (p[2] != '\0') { p++; } } *(s++) = *(p++); } === Is this the right approach? Any advice would be appreciated.