Torgny.Hallenmarkldc.lu.se

1
Lund University Sida Network Services

• Torgny.Hallenmark_at_ldc.lu.se

2

Network Services Network based services

• Network Administration
• E-mail Messaging Systems
• Group Communication
• Web Information Systems
• Network Access

3

Networks
Network Infrastructure

• LUNET - Lund University Network
• Multiple 100 Mbps in backbone
• Cisco routers/switches
• Own fiber cables within Lund
• Own microwave link to Malmö
• LDC runs backbone network
• Local system/network managers involved

4

Networks
Network Infrastructure

• SUNET Swedish University Network
• 155 Mbps, double connection
• Upgrade in progress Spring 2002
• 2.5 Gbit/s in access rings
• 10 Gbit/s in central rings
• NORDUnet Nordic University Network
• Internet The global network

5

Network Services
Network Services

• Network administration IP numbers
• E-mail Servers, accounts, addresses
• Group communication NetNews
• Information systems WWW
• Dial-up connection RAS modems
• Network login VPN, Netlogon

6

Network Admin
Network Administration

• IP numbers
• Class B network 130.235.0.0 (65000 addresses)
• Also some Class C networks in 194.47.0.0
• Internet domains within lu.se (and lth.se)
• lu.se Common addresses only
• net.lu.se Central network equipment
• adm.lu.se Central administrative systems
• ldc.lu.se LDC department
• math.lu.se Mathematics department

7

Network Admin
Network Administration

• Naming structure
• Personal name e-mail address
• Computer name computer address
• Service name service address
• Examples
• John.Svensson_at_dept.lu.se
• Server-12.dept.lu.se
• www.dept.lu.se

8

Network Admin
DNS Name Service

• DNS name servers
• 130.235.132.90 Primary name server, lu.se
• 130.235.128.100 Secondary name server, lu.se
• 130.235.20.3 Primary name server, lth.se
• Also some external DNS servers at ISPs
• A few local DNS name servers
• In more technical departments

9

Network Admin
DNS Name Service

• DNS name servers
• Running on Sun Solaris Unix
• DNS software
• Bind from Internet Software Consortium
• http//www.isc.org/
• We use version 8.2.3-REL
• Latest version 9.2.0

10

Network Admin
DHCP setting IP addresses

• DHCP/Bootp
• Dynamic Host Configuration Protocol
• Relation Ethernet address -- IP number
• But dynamic addresses normally not used
• Normally static addresses used
• Benefits
• Easier local configuration
• Less error risk
• Easier to re-number networks

11

Network Admin
DHCP setting IP addresses

• DHCP servers
• Running on Sun Solaris Unix
• Same servers as DNS name service
• Helper address needed in routers
• DHCP software
• DHCP from Internet Software Consortium
• http//www.isc.org/
• We use version 2.0
• Latest version 3.0

12

Mail Systems
E-mail Message Systems

• Running e-mail servers
• SMTP server mail.lu.se (smtp.lu.se)
• POP server pop.lu.se
• IMAP server imap.lu.se
• Webmail webmail.lu.se
• Handling e-mail addresses
• name address (Torgny.Hallenmark_at_ldc.lu.se)
• delivery address (ldc-tha_at_pop.lu.se)

13

Mail Systems
E-mail Addresses

• General naming structure for all persons
• Name address (alias)
• Firstname.Lastname_at_dept.lu.se
• Firstname.Lastname.nbr_at_student.lu.se
• Delivery address
• username_at_server.dept.lu.se

14

Mail Systems
Internet e-mail

• SMTP old standard still in use
• (Simple Mail Transfer Protocol)
• Enhancements over time
• ESMTP (Extended SMTP)
• MIME (Multipurpose Internet Mail Extension)
• Delivery
• POP, IMAP, webmail

15

Mail Systems
Central mail hosts

• SMTP mail hosts (mail switching)
• Running on Sun Solaris Unix
• SMTP software
• Sendmail from Sendmail Consortium
• http//www.sendmail.org/
• We use version 8.9.3
• Latest version 8.12.2

16

Mail Systems
Central mail hosts

• Sendmail alternatives
• Postfix http//www.postfix.com/
• Qmail http//www.qmail.org/
• And perhaps ?
• Microsoft Exchange

17

Mail Systems
Local mail servers

• Decentralized servers are accepted
• but they must be certified
• Incoming mail directed via MX in DNS
• Types of servers
• Unix POP servers (also IMAP and webmail)
• Microsoft Exchange servers
• Novell Netware with Mercury software
• Lotus Notes
• First Class

18

Mail Systems

Earlier central mail systems

• pop.lu.se POP, gather incoming e-mail
• mail.lu.se SMTP, central e-mail switch

19

Mail Systems
New central mail system

• New software
• iPlanet Messaging Server
• iPlanet Directory Server (LDAP)
• iPlanet Calendar Server
• New hardware
• 2 x Sun Enterprise 220R servers
• Disk space allocated in Compaq SAN system

20

Mail Systems
New central mail system

• Old mail host/switch still in use mail.lu.se
• Production start January 2002

21

Mail Systems

LUCAT catalogue

• Now more essential
• Traditional relational database system
• LUCAT contains
• Information on organizational units at LU
• Persons at departments

22

Mail Systems

LUCAT
mail.lu.se
e-mail server
LDAP
23

Mail Systems

Services via LUCAT LDAP

• The same username/password combination
• is used for authorization at login etc
• LUCAT personal information
• Central e-mail system
• Netlogon, network login
• RAS modem (LU dial-up modem pool)
• VPN login (to get within domain lu.se)
• Other kinds of login

24

Mail Systems
students
staff

LADOK
LUCAT Nimbus
LDAP Falstaff
LDAP Helikon
e-mail server staff Cassandra
e-mail server students Piraten
25

Mail Systems
Common mail client programs

• Eudora
• Light, sponsored or paid mode
• Netscape Mail
• Microsoft Outlook
• Pegasus (Novell)
• and others

26

Mail Systems
Spam and Virus mail

• Increasing load of unwanted mail
• What to do?
• Relaying should not be accepted
• Filtering, local
• Filtering, central
• Antivirus programs, local
• Antivirus programs, central

27

Network Services
Group Communication

• Internet NetNews system
• Global group communication
• Newsgroup structure
• alt, rec, sci, soc, comp,
• lu, se, swnet,
• NetNews server news.lu.se
• NetNews software http//www.isc.org/

28

Network Services
Web Information Services

• Central web server for LU
• http//www.lu.se/
• Web server for LDC
• http//www.ldc.lu.se/
• Other web servers at LDC
• Web hotel for departments
• Local web index

29

Network Services
Network Access

• RAS dial-up modem pool
• VPN login (Virtual Private Network)
• to get within domain lu.se
• Netlogon
• network login

30

Network Services
References / Links

• Server software
• Client software
• Documentation
• More information

31

32
(No Transcript)