Greetings Experts! Sorry for my poor english, but I?m inside of a terrible nightmare!!! I?m using Samba+LDAP has about 2 months ago without problems, but in the last 4 hours, the system is absolutelly unstable. I couldn?t upgrade or patched anything. The problem simply has appeared. Principally system characteristics: - Sun Fire V880 running Solaris 9 - openldap-2.2.23 - nss_ldap-232 - pam_ldap-176 - samba-3.0.11 ==> samba-3.0.14a Symptoms: the users couldn?t make login in Samba domain and the network for those that already connected were was very slow. SSH, NFS and Apache services were ok. The syslog said "nss_ldap: could not get LDAP result - Can't contact LDAP server". I tried to reinitialize the daemons (samba and ldap) but the problem has persisted. After that, I rebooted the server, but it doesn?t solve the problem too. Then I was upgraded my samba (from 3.0.11 to 3.0.14a) and now is possible to make login and work normally, but as at the moment it has only one few users, I fear that in the Monday the problem can be happened again. Please, PLEASE: somebody has some idea about as it can happen and as I could solve the problem, in case that it happens again? I?m really despaired. Any help is very appreciated! My smb.conf is thus: # Global parameters [global] workgroup = MY_DOMAIN netbios name = ARRAKIS server string = Server security = USER passdb backend = ldapsam:ldap://ldap.domain/ passwd program = /usr/local/sbin/smbldap-passwd -u %u passwd chat = *password* %n\n *new*password* %n\n passwd chat debug = Yes encrypt passwords = Yes log level = 3 max log size = 50000 load printers = No kernel oplocks = No utmp = yes domain logons = Yes domain master = Yes use sendfile = no keep alive = 60 smb ports = 445 139 wins server = 10.40.48.25 delete user script = /usr/local/sbin/smbldap-userdel "%u" add machine script = /usr/local/sbin/smbldap-useradd -w "%u" set primary group script = /usr/local/sbin/smbldap-usermod -g "%g" "%u" add user to group script = /usr/local/sbin/smbldap-groupmod -m "%u" "%g" delete user from group script = /usr/local/sbin/smbldap-groupmod -x "%u" "%g" add group script = /usr/local/sbin/smbldap-groupadd "%g" delete group script = /usr/local/sbin/smbldap-groupdel "%g" logon drive = h: logon script = %U.bat logon path = \\%N\profiles\%U ldap server = ldap.domain ldap port = 389 ldap suffix = dc=domain,dc=mine ldap machine suffix = ou=Computers ldap user suffix = ou=Users ldap group suffix = ou=Groups ldap admin dn = cn=Administrator,dc=domain,dc=min ldap passwd sync = Yes ldap delete dn = Yes I was compiled the softs with these options: OpenLDAP: ./configure --with-tls \ --disable-wrappers \ --enable-crypt \ --enable-bdb \ --enable-ldbm \ --enable-spasswd \ --with-cyrus-sasl \ --enable-slapd \ --enable-syslog \ --enable-ipv6=no \ --without-kerberos \ --enable-shared Samba: ./configure --with-readline \ --with-smbwrapper \ --with-ldap \ --with-ldapsam \ --with-pam \ --with-pam_smbpass \ --with-syslog \ --with-quotas \ --with-utmp \ --with-vfs Apparently, the most significative system error log says this: ==============================================Apr 23 00:09:46 arrakis smbd[22907]: [ID 510469 daemon.error] nss_ldap: could not get LDAP result - Can't contact LDAP server Apr 23 00:09:46 arrakis last message repeated 1 time Apr 23 00:09:46 arrakis smbd[22907]: [ID 982204 daemon.info] nss_ldap: reconnecting to LDAP server... Apr 23 00:09:46 arrakis slapd[159]: [ID 848112 local4.debug] conn=1364 fd=19 ACCEPT from IP=200.132.10.12:34100 (IP=0.0.0.0:389) Apr 23 00:09:46 arrakis slapd[159]: [ID 347666 local4.debug] conn=1364 op=0 BIND dn="" method=128 Apr 23 00:09:46 arrakis slapd[159]: [ID 217296 local4.debug] conn=1364 op=0 RESULT tag=97 err=0 textApr 23 00:09:46 arrakis smbd[22907]: [ID 569656 daemon.info] nss_ldap: reconnected to LDAP server after 1 attempt(s) Apr 23 00:09:46 arrakis slapd[159]: [ID 870088 local4.debug] get_filter: unknown filter type=130 Apr 23 00:09:46 arrakis last message repeated 3 times Apr 23 00:09:46 arrakis slapd[159]: [ID 998954 local4.debug] conn=1364 op=1 SRCH base="dc=domain,dc=mine" scope=2 deref=0 filter="(&( objectClass=nisNetgroup)(|(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined) (?=undefined)(?=undefined)(?=undefined)(?=undefined)))" ...... Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Failed to set socket option SO_KEEPALIVE (Error Invalid argument) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Failed to set socket option TCP_NODELAY (Error Invalid argument) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/access.c:check_access(328) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Denied connection from (0.0.0.0) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Connection denied from 0.0.0.0 Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket_data(430) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] write_socket_data: write failure. Error = Broken pipe Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket(455) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] write_socket: Error writing 5 bytes to socket 5: ERRNO = Broken pipe Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:send_smb(647) Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Error writing 5 bytes to client. -1. (Broken pipe) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Failed to set socket option SO_KEEPALIVE (Error Invalid argument) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Failed to set socket option TCP_NODELAY (Error Invalid argument) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/access.c:check_access(328) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Denied connection from (0.0.0.0) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Connection denied from 0.0.0.0 Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket_data(430) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] write_socket_data: write failure. Error = Broken pipe Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket(455) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] write_socket: Error writing 5 bytes to socket 5: ERRNO = Broken pipe Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:send_smb(647) Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Error writing 5 bytes to client. -1. (Broken pipe) Apr 23 00:10:59 arrakis smbd[22723]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] smbd/server.c:open_sockets_smbd(388) Apr 23 00:10:59 arrakis smbd[22723]: [ID 702911 daemon.error] open_sockets_smbd: accept: Software caused connection abort ============================================== I was read about these errors in the samba-list archives and tried to use some options in my smb.conf (more especifically "keep alive = 60", "smb ports = 445 139" e "use sendfile = no"), but this didn?t result. These errors appears to each 1-5 minutes. THANKS in advance for ANY help.
Your ldap server is on the same server or on a other server ? Have you verify that you not have a network problem with your server which contain LDAP. Luiz Alfredo Baggiotto a ?crit :>Greetings Experts! > >Sorry for my poor english, but I?m inside of a terrible nightmare!!! >I?m using Samba+LDAP has about 2 months ago without problems, but in the last 4 hours, the system is absolutelly unstable. I couldn?t upgrade or patched anything. The problem simply has appeared. > >Principally system characteristics: > >- Sun Fire V880 running Solaris 9 >- openldap-2.2.23 >- nss_ldap-232 >- pam_ldap-176 >- samba-3.0.11 ==> samba-3.0.14a > >Symptoms: the users couldn?t make login in Samba domain and the network for those that already connected were was very slow. SSH, NFS and Apache services were ok. The syslog said "nss_ldap: could not get LDAP result - Can't contact LDAP server". > >I tried to reinitialize the daemons (samba and ldap) but the problem has persisted. After that, I rebooted the server, but it doesn?t solve the problem too. Then I was upgraded my samba (from 3.0.11 to 3.0.14a) and now is possible to make login and work normally, but as at the moment it has only one few users, I fear that in the Monday the problem can be happened again. > >Please, PLEASE: somebody has some idea about as it can happen and as I could solve the problem, in case that it happens again? I?m really despaired. Any help is very appreciated! > >My smb.conf is thus: > ># Global parameters >[global] > workgroup = MY_DOMAIN > netbios name = ARRAKIS > server string = Server > security = USER > passdb backend = ldapsam:ldap://ldap.domain/ > passwd program = /usr/local/sbin/smbldap-passwd -u %u > passwd chat = *password* %n\n *new*password* %n\n > passwd chat debug = Yes > encrypt passwords = Yes > log level = 3 > max log size = 50000 > load printers = No > kernel oplocks = No > utmp = yes > domain logons = Yes > domain master = Yes > use sendfile = no > keep alive = 60 > smb ports = 445 139 > wins server = 10.40.48.25 > delete user script = /usr/local/sbin/smbldap-userdel "%u" > add machine script = /usr/local/sbin/smbldap-useradd -w "%u" > set primary group script = /usr/local/sbin/smbldap-usermod -g "%g" "%u" > add user to group script = /usr/local/sbin/smbldap-groupmod -m "%u" "%g" > delete user from group script = /usr/local/sbin/smbldap-groupmod -x "%u" "%g" > add group script = /usr/local/sbin/smbldap-groupadd "%g" > delete group script = /usr/local/sbin/smbldap-groupdel "%g" > logon drive = h: > logon script = %U.bat > logon path = \\%N\profiles\%U > ldap server = ldap.domain > ldap port = 389 > ldap suffix = dc=domain,dc=mine > ldap machine suffix = ou=Computers > ldap user suffix = ou=Users > ldap group suffix = ou=Groups > ldap admin dn = cn=Administrator,dc=domain,dc=min > ldap passwd sync = Yes > ldap delete dn = Yes > >I was compiled the softs with these options: > >OpenLDAP: ./configure --with-tls \ > --disable-wrappers \ > --enable-crypt \ > --enable-bdb \ > --enable-ldbm \ > --enable-spasswd \ > --with-cyrus-sasl \ > --enable-slapd \ > --enable-syslog \ > --enable-ipv6=no \ > --without-kerberos \ > --enable-shared > >Samba: ./configure --with-readline \ > --with-smbwrapper \ > --with-ldap \ > --with-ldapsam \ > --with-pam \ > --with-pam_smbpass \ > --with-syslog \ > --with-quotas \ > --with-utmp \ > --with-vfs > >Apparently, the most significative system error log says this: > >==============================================>Apr 23 00:09:46 arrakis smbd[22907]: [ID 510469 daemon.error] nss_ldap: could not get LDAP result - Can't contact LDAP server >Apr 23 00:09:46 arrakis last message repeated 1 time >Apr 23 00:09:46 arrakis smbd[22907]: [ID 982204 daemon.info] nss_ldap: reconnecting to LDAP server... >Apr 23 00:09:46 arrakis slapd[159]: [ID 848112 local4.debug] conn=1364 fd=19 ACCEPT from IP=200.132.10.12:34100 (IP=0.0.0.0:389) >Apr 23 00:09:46 arrakis slapd[159]: [ID 347666 local4.debug] conn=1364 op=0 BIND dn="" method=128 >Apr 23 00:09:46 arrakis slapd[159]: [ID 217296 local4.debug] conn=1364 op=0 RESULT tag=97 err=0 text>Apr 23 00:09:46 arrakis smbd[22907]: [ID 569656 daemon.info] nss_ldap: reconnected to LDAP server after 1 attempt(s) >Apr 23 00:09:46 arrakis slapd[159]: [ID 870088 local4.debug] get_filter: unknown filter type=130 >Apr 23 00:09:46 arrakis last message repeated 3 times >Apr 23 00:09:46 arrakis slapd[159]: [ID 998954 local4.debug] conn=1364 op=1 SRCH base="dc=domain,dc=mine" scope=2 deref=0 filter="(&( >objectClass=nisNetgroup)(|(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined)(?=undefined) >(?=undefined)(?=undefined)(?=undefined)(?=undefined)))" > >...... > >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Failed to set socket option SO_KEEPALIVE (Error Invalid argument) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Failed to set socket option TCP_NODELAY (Error Invalid argument) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/access.c:check_access(328) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Denied connection from (0.0.0.0) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Connection denied from 0.0.0.0 >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket_data(430) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] write_socket_data: write failure. Error = Broken pipe >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket(455) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] write_socket: Error writing 5 bytes to socket 5: ERRNO = Broken pipe >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:send_smb(647) >Apr 23 00:10:59 arrakis smbd[22828]: [ID 702911 daemon.error] Error writing 5 bytes to client. -1. (Broken pipe) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Failed to set socket option SO_KEEPALIVE (Error Invalid argument) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:set_socket_options(202) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Failed to set socket option TCP_NODELAY (Error Invalid argument) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/access.c:check_access(328) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Denied connection from (0.0.0.0) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:get_peer_addr(1150) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] getpeername failed. Error was Transport endpoint is not connected >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Connection denied from 0.0.0.0 >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket_data(430) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] write_socket_data: write failure. Error = Broken pipe >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:write_socket(455) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] write_socket: Error writing 5 bytes to socket 5: ERRNO = Broken pipe >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] lib/util_sock.c:send_smb(647) >Apr 23 00:10:59 arrakis smbd[22830]: [ID 702911 daemon.error] Error writing 5 bytes to client. -1. (Broken pipe) >Apr 23 00:10:59 arrakis smbd[22723]: [ID 702911 daemon.error] [2005/04/23 00:10:59, 0] smbd/server.c:open_sockets_smbd(388) >Apr 23 00:10:59 arrakis smbd[22723]: [ID 702911 daemon.error] open_sockets_smbd: accept: Software caused connection abort >==============================================> >I was read about these errors in the samba-list archives and tried to use some options in my smb.conf (more especifically "keep alive = 60", "smb ports = 445 139" e "use sendfile = no"), but this didn?t result. These errors appears to each 1-5 minutes. > >THANKS in advance for ANY help. > > > > >-- St?phane Purnelle <stephane.purnelle@tiscali.be> Site Web : http://www.linuxplusvalue.be