We're also seeing similar symptoms with our Squid proxy's winbindd as well. After an indeterminate amount of time (sometimes an hour, sometimes a day) the winbind process will lose the ability to resolve UID/GIDs to SIDS and authentication to the proxy will fail: [2012/04/27 11:04:52.217243, 3] lib/util_sid.c:228(string_to_sid) string_to_sid: Sid @CBJ_NT+domain users does not start with 'S-'. If we try doing a winbind -p we get a sucessful return however trying to lookup a SID from UID/GID fails. We're on Debian 6.0.4 and Samba 2.3.5.6. Has anyone else seen this issue? Any possible workarounds or patches? Here's an the debugging output for a particular user: [2012/04/27 11:04:52.217018, 3] smbd/process.c:1294(switch_message) switch message SMBtconX (pid 15651) conn 0x0 [2012/04/27 11:04:52.217041, 3] smbd/sec_ctx.c:310(set_sec_ctx) setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0 [2012/04/27 11:04:52.217062, 5] auth/token_util.c:525(debug_nt_user_token) NT user token: (NULL) [2012/04/27 11:04:52.217085, 5] auth/token_util.c:551(debug_unix_user_token) UNIX token of user 0 Primary group is 0 and contains 0 supplementary groups [2012/04/27 11:04:52.217132, 5] smbd/uid.c:369(change_to_root_user) change_to_root_user: now uid=(0,0) gid=(0,0) [2012/04/27 11:04:52.217169, 4] smbd/reply.c:786(reply_tcon_and_X) Client requested device type [?????] for share [FTP] [2012/04/27 11:04:52.217209, 5] smbd/service.c:1227(make_connection) making a connection to 'normal' service ftp [2012/04/27 11:04:52.217243, 3] lib/util_sid.c:228(string_to_sid) string_to_sid: Sid @CBJ_NT+domain users does not start with 'S-'. [2012/04/27 11:04:52.217268, 5] smbd/password.c:423(user_in_netgroup) Unable to get default yp domain, let's try without specifying it [2012/04/27 11:04:52.217289, 5] smbd/password.c:430(user_in_netgroup) looking for user CBJ_NT+kevin_miller of domain (ANY) in netgroup CBJ_NT+domain users [2012/04/27 11:04:52.217316, 5] smbd/password.c:453(user_in_netgroup) looking for user cbj_nt+kevin_miller of domain (ANY) in netgroup CBJ_NT+domain users [2012/04/27 11:04:52.217342, 10] passdb/lookup_sid.c:69(lookup_name) lookup_name: CBJ_NT\domain users => CBJ_NT (domain), domain users (name) [2012/04/27 11:04:52.217363, 10] passdb/lookup_sid.c:70(lookup_name) lookup_name: flags = 0x077 [2012/04/27 11:04:52.217841, 10] passdb/util_wellknown.c:152(lookup_wellknown_name) map_name_to_wellknown_sid: looking up domain users [2012/04/27 11:04:52.217890, 3] smbd/sec_ctx.c:210(push_sec_ctx) push_sec_ctx(0, 0) : sec_ctx_stack_ndx = 1 [2012/04/27 11:04:52.217921, 3] smbd/uid.c:429(push_conn_ctx) push_conn_ctx(0) : conn_ctx_stack_ndx = 0 [2012/04/27 11:04:52.217945, 3] smbd/sec_ctx.c:310(set_sec_ctx) setting sec ctx (0, 0) - sec_ctx_stack_ndx = 1 [2012/04/27 11:04:52.217966, 5] auth/token_util.c:525(debug_nt_user_token) NT user token: (NULL) [2012/04/27 11:04:52.217987, 5] auth/token_util.c:551(debug_unix_user_token) UNIX token of user 0 Primary group is 0 and contains 0 supplementary groups [2012/04/27 11:04:52.218079, 3] smbd/sec_ctx.c:418(pop_sec_ctx) pop_sec_ctx (0, 0) - sec_ctx_stack_ndx = 0 [2012/04/27 11:04:52.219317, 5] smbd/share_access.c:117(token_contains_name) lookup_name CBJ_NT+domain users failed [2012/04/27 11:04:52.219365, 10] smbd/share_access.c:216(user_ok_token) User CBJ_NT+kevin_miller not in 'valid users' [2012/04/27 11:04:52.219394, 2] smbd/service.c:598(create_connection_server_info) user 'CBJ_NT+kevin_miller' (from session setup) not permitted to access this share (ftp) [2012/04/27 11:04:52.219420, 1] smbd/service.c:678(make_connection_snum) create_connection_server_info failed: NT_STATUS_ACCESS_DENIED [2012/04/27 11:04:52.219452, 3] smbd/error.c:80(error_packet_set) error packet at smbd/reply.c(795) cmd=117 (SMBtconX) NT_STATUS_ACCESS_DENIED Here's the debugging output from the winbindd-idmap.old log: 2012/04/27 10:58:37.616201, 10] winbindd/idmap_util.c:115(idmap_gid_to_sid) idmap_gid_to_sid: gid = [1004], domain = '' [2012/04/27 10:58:37.616243, 10] lib/gencache.c:334(gencache_get_data_blob) Cache entry with key = IDMAP/GID2SID/1004 couldn't be found [2012/04/27 10:58:37.616265, 10] winbindd/idmap.c:745(idmap_backends_unixid_to_sid) idmap_backend_unixid_to_sid: domain = '', xid = 1004 (type 2) [2012/04/27 10:58:37.616331, 10] winbindd/idmap.c:475(idmap_find_domain) idmap_find_domain called for domain '' [2012/04/27 10:58:37.616352, 5] winbindd/idmap_tdb.c:696(idmap_tdb_id_to_sid) Requested id (1004) out of range (10000 - 79999). Filtered! [2012/04/27 10:58:37.616380, 10] lib/gencache.c:180(gencache_set_data_blob) Adding cache entry with key = IDMAP/UID2SID/1004 and timeout = Fri Apr 27 11:00:37 2012 (120 seconds ahead) [2012/04/27 10:58:37.616436, 10] winbindd/idmap_util.c:151(idmap_gid_to_sid) gid [1004] not mapped [2012/04/27 10:58:37.616456, 1] ../librpc/ndr/ndr.c:251(ndr_print_function_debug) wbint_Gid2Sid: struct wbint_Gid2Sid out: struct wbint_Gid2Sid sid : * sid : S-0-0 result : NT_STATUS_NONE_MAPPED -- Kevin Elliott Network Specialist City and Borough of Juneau, MIS (907) 586 - 0905 > -----Original Message----- > From: samba-bounces@xxxxxxxxxxxxxxx > [mailto:samba-bounces@xxxxxxxxxxxxxxx] On Behalf Of Daniele > Sent: Sunday, April 29, 2012 11:50 PM > To: samba@xxxxxxxxxxxxxxx > Subject: winbind stop working > > Hi, I am trying to use squid proxy with validation on win > 2003 active directory to filter internet navigation and for > it I installed an ubuntu > 10.04 server 64 bit with samba. > My installation looks ok, the server is joined to the AD, > ntlm is able to validate user, wbinfo report corret > information and squid works good. > The problem arise after some hours: winbind become not able > to resolv info for users and to retrieve info for groups, so > squid become not able to know id a user belong to a group > allowed to navigate and refuse connection. > Restarting winbind solve the problem for some hours. > wbinfo report no particular problem; just give back messages > like "could not get info for user xx" and also setting > debuglevel to various numbers reports (to me) no significant clues. > I made a workaround scheduling a restart of winbind service > at every half hour and it works, but is not so elegant ... > Do you have any suggestion to solve this problem? > Thank you > Daniele > > samba/winbind version is 3.4.7 > squid is 2.7.STABLE7 > os is 2.6.32-41-server #88-Ubuntu x86_64 GNU/Linux > > smb.conf: > [global] > workgroup = CED > realm = CED.AOS > server string = Samba Server Version %v > security = ADS > password server = 172.18.10.24 172.18.10.23 > name resolve order = lmhosts host bcast > ldap ssl = no > idmap uid = 15000-25000 > idmap gid = 15000-25000 > winbind separator = + > winbind enum users = Yes > winbind enum groups = Yes > winbind use default domain = Yes > cups options = raw > [homes] > comment = Home Directories > read only = No > browseable = No > browsable = No > > [printers] > comment = All Printers > path = /var/spool/samba > printable = Yes > browseable = No > browsable = No > > > ---- > Le informazioni contenute in questa comunicazione e gli > eventuali documenti allegati hanno carattere confidenziale e > sono ad uso esclusivo del destinatario. Nel caso in cui > questa comunicazione Vi sia pervenuta per errore, Vi > informiamo che la sua diffusione e riproduzione e' contraria > alla legge, pertanto Vi preghiamo di darci prontamente avviso > e di cancellare quanto ricevuto. > Grazie. > > This e-mail message and any files transmitted with it contain > confidential information intended only for the person(s) to > whom it is addressed. If you are not the intended recipient, > you are hereby notified that any use or distribution of this > e-mail is strictly prohibited: please notify the sender and > delete the original message. > Thank you. > -- > To unsubscribe from this list go to the following URL and read the > instructions: https://lists.samba.org/mailman/options/samba > -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba