Unit 4. NFS and Samba

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Garry Sherman
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1 it 4 F ad amba oa Warre

2 F (etwork File ystem) F allows remote access to files o a Liux system he F cliet logs ito the F server ad mouts the exported directories i at a local l mout poit hared files ca be accessed as local drives F ca service multiple cliets simultaeously F cliets are available for most operatig systems but a used primarily o Liux ad systems oa Warre

3 F equiremets CP/P ruig o both cliet ad host ad be able to commuicate he local file systems cofigured for export he cliet must mout the F file system o the remote machie he cliet must be ruig portmap, p, mout ad showmout ad F file lockig services oa Warre

4 F Cliet Commads out the F filesystem mout serverame:/path /moutpoit List the exported filesystems showmout e fs_serverame Ca use /etc/fstab file to mout automatically oa Warre

5 F erver Cofiguratio he F service must be istalled ad ruig he rpc.statd, rpc.rquotd, rpc.moutd ad the rpc,sfd must be started he /etc/exports file must be created ad cofigured oa Warre

6 /etc/export Cofiguratio ust specify a filesystem or directory export poit machie ame or list of machie ames allowed to access the export wildcard d ca be used to grat access to all machies o the local etwork out permissio optios oa Warre

7 out Permissio ptios ro read-oly, default rw read/write root_squash does ot allow o-local root users access o_root_squash allows remote root users access oacess cliet has o access below specified directory all-squash aoymous access oly o-all-squash requires user autheticatio ti ti oa Warre

8 ample exports File /var/ftp/pub/rh7 (rw) /mt/cdrom (ro,root_squash) oa Warre

9 B oa Warre

10 What is B? Liux implemetatio of the erver essage Block Protocol (B) B allows file ad priter iteractio across multiple operatig system etworks ses the B protocol for ame resolutio ad browsig oa Warre

11 Capabilities out widows folders o your Liux box out Liux segmets o your widows, acitosh, or aother Liux box Prit from Liux to a widows priter Prit from widows to a Liux priter Prit to ay priter o a operatig system that speaks B oa Warre

12 Liux aemos he smbd daemo hadles file ad prit sharig requests hembd daemo hadles etb ame traslatio he mbd daemo allows a Liux box to sed ad receive W requests to a Ws server llows Liux to use the widows browsig service oa Warre

13 /etc/samba/smb.cof amba cofiguratio file. ither a Hash mark # or a semi-colo : commets out a etry here are three sectios #=======Global ettigs========== #========hare efiitios======== #========hare xamples======== oa Warre

14 amba Global Cofiguratio workgroup- Widows omai or Workgroup ame server strig escriptio (e.g. amba erver) hosts allow list of host allowed to use the amba server host ame (e.g. istructor) host P ddress (e.g ) ) etwork P ddress (e.g ) P age (e.g / ) oa Warre

15 amba Global Cofiguratio pritcap ame priter defiitio file (e.g. /etc/pritcap load priters = yes pritig method to talk to priters (e.g. pritig = bsd) ca igore if pritcap set. guest accout userame for guests, by default this is the obody accout so this ca be left commeted out oa Warre

16 amba Global Cofiguratio Log file sets ame ad path for the samba log file (eg. /var/log/samba/log.%m) %m deotes a series of files ax log size size of log value of 0 will allow the file to grow to ulimited size security type of autheticatio used (e.g. security = user) oa Warre

17 amba Global Cofiguratio password level & user level provides compatibility with legacy systems where passwords were ot case sesitive such as WFW crypt passwords determies whether samba requires ecrypted passwords. (ust be yes for 2000 etworks) smb passwrd file file cotaiig ecrypted passwords (e.g. /etc/smbpasswd) oa Warre

18 amba Global Cofiguratio uix password syc = yes sed to make sure samba password chages whe Liux password chages passwd program = /usr/bi/passwd/bi / %u passwd chat = *ew**password* %\ *eype*ew**password* %\ *passwd:*all*autheticatio*tokes*upd ated*successfully* (aswers passwd program s questios) oa Warre

19 amba Global Cofiguratio userame map poits to a file with data o how to covert userame from from remote machies to this machie (ot ecessary to use i most cases) iclude allows additioal cofiguratio files for specific machies socket optios sets the socket the samba server uses to commuicate oa Warre

20 amba Global Cofiguratio iterfaces sets the samba server s s ip address for broadcast messages. Ca either be a iterface ame or a ip/subet mask pair remote browse syc tells the machie to update the mbd to update its etb ame list from a master browser o the etwork oa Warre

21 amba Global Cofiguratio remote aouce tells mbd to broadcast its availability as a browser local master determies whether samba server will offer browsig services to its cliets. ormally either commeted out or set to yes domai master ormally set to o sice usually workig i a Widows or ovell etwork oa Warre

22 amba Global Cofiguratio preferred master ormally set to o or commeted out domai logos sets whether this server offers workgroup or domai logis to widows 95/98 machies. ormally set to o or commeted out logo script used with domai logo to ru logo scripts logo path used with domai logo to allow roamig profiles oa Warre

23 amba Global Cofiguratio ame resolve order ormally ot used wis support samba offers wis seervices wis server idetifies the wis server to use ds proxy ormally o, but ca be used to reformat a etbios ame to a FQ to attemt resolutio oa Warre

24 amba Global Cofiguratio preserve case active by default short preserve case also active by default default case = lower case sesitive = o does ot require exact case matchig o samba share ames oa Warre

25 amba hare Cofiguratios ptios apply to a specific share ach share ame is i brackets [shareame] commet allows commets browsable specifies if browsable writable specifies if writable oa Warre

26 eserved hares [homes] provide access to user home directories commet = Home irectories browsable = o (ot o browse list) writable = yes (read/write access) oa Warre

27 eserved hares [etlogo] starts etlogo service Commet = etlogo ervice Path = /home/etlogo Guest ok = yes Writable = o hare modes = o (simulates widows file mode) oa Warre

28 eserved hares [priters] sets default for LL priters commet = all priters path = /var/spool/samba browsable = o guest ok = o writable = o pritable = yes oa Warre

29 eserved hares [profiles] stores widows roamig profile data path = /home/profiles browsable = o guest ok = yes oa Warre

30 reserved hares [tmp] ca use tmp to defie a whole ew sectio if you wat to commet = temporary file space path = /tmp read oly = o (sets as read/write) public = yes oa Warre

31 reserved hares [public] creates a public directory commet = public stuff path = /home/samba public = yes writable = yes pritable = o write list write list = Paul oa Warre

32 ummary F allows others to access shared documets o the Liux machie amba is specifically desiged toallow a Liux machie to access shared folders o a widows etwork t also allows the Liux machie to log oto the widows etwork if both machies are cofigured correctly oa Warre

33 Lab 4 stall ad cofigure a F server Cofigure a F cliet stall ad cofigure a amba server Cofigure a samba cliet est both the F ad amba servers oa Warre

L I N U X. Unit 6 S Y S T E M DHCP & DNS (BIND) A D M I N I S T R A T I O n DPW

L I N U X. Unit 6 S Y S T E M DHCP & DNS (BIND) A D M I N I S T R A T I O n DPW it 6 HCP & (B) oa Warre HCP ervice yamically assigs a P address to requestig machies P addresses are leased scope of addresses ca be assiged or excluded from assigmet HCP servers do ot talk to each other