I have run the familiar tests for smb on the server and the clients. All the tests on the server side work. Connect from clients on the same subnet or other subnets fail. All these tests work: testparm smbclient -L yourserver -N ps -ef | grep nmbd service smb status service nmb status *netstat -nlp | grep smb* tcp 0 0 :::139 :::* LISTEN 2904/smbd tcp 0 0 :::445 :::* LISTEN 2904/smbd *netstat -nlp | grep nmb* udp 0 0 128.148.136.127:137 0.0.0.0:* 2921/nmbd udp 0 0 128.148.136.51:137 0.0.0.0:* 2921/nmbd udp 0 0 0.0.0.0:137 0.0.0.0:* 2921/nmbd udp 0 0 128.148.136.127:138 0.0.0.0:* 2921/nmbd udp 0 0 128.148.136.51:138 0.0.0.0:* 2921/nmbd udp 0 0 0.0.0.0:138 0.0.0.0:* 2921/nmbd * **nmblookup -B aclient '*' **nmblookup -d 2 "*" * nmblookup -d 2 "*" rlimit_max: rlimit_max (1024) below minimum Windows limit (16384) added interface eth0 ip=128.148.136.51 bcast=128.148.136.127 netmask=255.255.255.128 added interface lo ip=127.0.0.1 bcast=127.255.255.255 netmask=255.0.0.0* *querying * on 128.148.136.127 querying * on 127.255.255.255 Got a positive name query response from 127.0.0.1 ( 128.148.136.51 ) 128.148.136.51 *<00>* nmblookup -B m3science __SAMBA__ *querying __SAMBA__ on 128.148.136.51 128.148.136.51 __SAMBA__<00>* nmblookup -M m3science *querying m3science on 128.148.136.127 querying m3science on 127.255.255.255 128.148.136.51 m3science<1d>* >From a Mac *Connecting to smb://m3science.geo.brown.edu... There is an error connecting to the server. Check the server name and try again. The mac can ping m3science.geo.brown.edu. * ** ** cat /etc/redhat-release *Red Hat Enterprise Linux Server release 6.1 (Santiago)* ifconfig* eth0 Link encap:Ethernet HWaddr 00:19:B9:FE:A9:C0 inet addr:128.148.136.51 Bcast:128.148.136.127 Mask:255.255.255.128 inet6 addr: fe80::219:b9ff:fefe:a9c0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:249142823 errors:0 dropped:0 overruns:0 frame:0 TX packets:317977045 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:118600620840 (110.4 GiB) TX bytes:335797640927 (312.7 GiB) Interrupt:16 * more /etc/samba/smb* workgroup = m3 server string = m3 netbios name = m3 interfaces = 128.148.136.51 127.0.0.1 hosts allow = 128.148.136. 128.148.119. 128.148.116. 128.148.124. 127. remote announce = 128.148.68.255/m3science 128.148.124.255/m3science 128.148.119.255/m3science 128.148.116.255/m3science 128.148.171.255/m3science 128.148.136/m3science log file = /var/log/samba/log.%m max log size = 50 security = user passdb backend = tdbsam encrypt passwords = yes # invalid users = bin daemon sys adm tty disk lp mem kmem wheel mail news uucp man games gopher domain master = yes domain logons = yes local master = yes os level = 255 preferred master = yes wins support = yes wins proxy = no dns proxy = no -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list