question: public LDAPConnection bindAs ( String userDN , String password ) throws GuacamoleException { LDAPConnection ldapConnection = createLDAPConnection ( ) ; try { ldapConnection . connect ( confService . getServerHostname ( ) , confService . getServerPort ( ) ) ; if ( confService . getEncryptionMethod ( ) == EncryptionMethod . STARTTLS ) ldapConnection . startTLS ( ) ; } catch ( LDAPException e ) { logger . error ( "Unable to connect to LDAP server: {}" , e . getMessage ( ) ) ; logger . debug ( "Failed to connect to LDAP server." , e ) ; return null ; } try { byte [ ] passwordBytes ; try { if ( password != null ) passwordBytes = password . getBytes ( "UTF-8" ) ; else passwordBytes = null ; } catch ( UnsupportedEncodingException e ) { logger . error ( "Unexpected lack of support for UTF-8: {}" , e . getMessage ( ) ) ; logger . debug ( "Support for UTF-8 (as required by Java spec) not found." , e ) ; disconnect ( ldapConnection ) ; return null ; } ldapConnection . bind ( LDAPConnection . LDAP_V3 , userDN , passwordBytes ) ; } catch ( LDAPException e ) { logger . debug ( "LDAP bind failed." , e ) ; disconnect ( ldapConnection ) ; return null ; } return ldapConnection ; }
target:  Binds to the LDAP server using the provided user DN and password.