Linux security 4-6

resolution

A ___ record in a root zone file defines the answer given when its name is queried.

hop

A ___ refers to passing through a router to reach a final destination.

Mail Transfer Agent (MTA)

A(n) ___, commonly referred to as the email server, moves mail between servers.

web

A(n) __________ server in Linux terminology is a daemon that accepts requests via HTTP and responds with the requested files.

zone

A(n) __________ transfer occurs when a slave server requests a copy of the zone file and the master server sends it.

container

A(n) ___________ is a special type of directive that activates other directives only if a condition is met or only within a particular context.

classes

After creating ___ of users, you may assign permission within FTP based on a grouping that you define.

TCP/IP

Although WIndows networking can use various low-level networking protocols, Samba only uses ___.

console

An SNMP ___ program can present SNMP data statistically as graphs or summaries.

agent

An SNMP-aware program running on a host is called a(n) ________.

master

An authority server called a ___ is managed directly by editing the zone file for your domain

alias

An email ___ is another name that delivers email messages to a user.

ftpshut

As soon as a superserver is watching for ftp connections, you can stop allowing connections using the command ___.

blacklists

DNS __ are lists of sites that are known sources of spam.

superservers

Daemons can be loaded on demand using software called ____________ that listen on multiple network ports and start the appropriate service when a client requests a connection for that port or, in the case of UDP, a datagram arrives.

stratum

Each level in an NTP server hierarchy is called a(n) ____.

mailstats

Fields in the output of ___ include messages received, bytes received, messages sent, bytes sent, messages rejected, and messages discarded.

in.fingerd

If the finger program is enabled, the superserver watches for incoming finger queries on port 79 and sends them to the ___ daemon.

anonymous

If you point your Web browser to ftp://ftp.hq.nasa.gov, the browser uses the name ___ and your email address to log on to the server.

user

In smb.conf, the security=___ directive means that all users who log on to your Samba server have the same access, which you define in your configuration.

rewriting

In the context of sendmail, email messages are standardized in part by the so-called "___ rules" that are a default part of every sendmail.cf file.

Remote Procedure Call (RPC)

NFS communication is build on the __________________________ service.

rpc.mountd

NFS itself uses the ___ daemon to make new connections--that is, to mount a remote filesystem.

squashing

NFS uses a security concept called ___ to prevent a user from gaining access to a user account on the NFS server simply because the user has the same ID on the NFS client

NNTP

Newsgroup postings are passed around the Internet using ___.

flooding

OSPF uses a technique called ___ to share information among routers.

routed

RIP may be implemented in Linux using the ___ daemon.

second

SNTP precision allows accuracy no better than plus or minus one ___.

list

Sending the word ___ as the body of an email message to [email protected] causes majordomo to send back a list of all the mailing lists being hosted on that server.

Network Time Protocol (NTP)

The Internet's time synchronization protocol, ________ is described in RFC 1305.

MaxRequestsPerChild

The ___ directive defines how many requests ( or connections, if you are using keepalives) a single copy of Apache will process.

AddModule

The ___ directive used by Apache defines a code file for a module.

-C

The ___ option for the host command queries all name servers that are authoritative for a zone and displays their SOA records.

Status

The ___ page within SWAT shows you the state of the smbd, nmbd, and winbindd servers and lets you start or restart them using buttons on the Web page.

[global]

The ___ section of a samba.conf file defines the overall operation of the samba server.

-s

The ____ option for syslogd lets you specify domain names to be stripped off before logging an event.

echo

The ____ service on UDP or TCP port 7 repeats back to you whatever you type.

Samba

The _________ suite of programs is used to implement SMB and NetBIOS In Linux systems.

majordomo

The ____________ package is a collection of Perl scripts that interact with the sendmail mail server to create automated mailing lists.

nobody

The all_squash option in the line /pub (ro,all_squash) causes all users on client systems to be mapped to a(n) "___" user on the NFS server.

13

The daytime service on UDP and TCP port ____ returns the current date and time in human-readable form, then closes the connection.

.pgp

The finger program provides the user/s public encryption key using the ___ file.

ntpdate

The most common way to set time at boot-up is to use the ___ program.

NetBEUI

The option ___ protocol implements NetBIOS functionality on Windows systems.

517

The talkd daemon uses UDP on port ___ to communicate with remote hosts.

telephony

The term __________ typically refers to having a computer interact with a telephone in such a way that it can be an answering machine, route and track calls, act as a voice recorder, and so on.

write

To do FTP file uploads, users need ________ permissions in the directory.

limit

To limit the number of bytes a user can transfer in a single session, use the ___ directive.

reverse

When IP addresses are converted to a DNS name, this is called a(n) _________ lookup.

o

When using a mount command to mount a Windows share, you include a username as an option with the ___ parameter.

hard

When you __ mount an NFS filesystem, your programs wait--without limit-- for the NFS server to respond.

nmblookup

Which of the following Samba client programs queries the network for NETBIOS names and displays the results?

netbios name = sundance

Which of the following lines in an smb.conf file defines the host name of your Samba server?

printing = cups

Which of the following lines in an smb.conf file defines where Linux printers are defined?

time

Which of the following programs enables you to add a time server in Windows XP?

shares

Windows resources that are available over the network are called ___.

PTR

Within a reverse lookup zone file, a(n) ___ record "points" to the name to which an IP address is assigned.

allow-retrieve

You can effectively override the noretrieve directive using the ___ directive.

smbclient

You can see a list of shares for any of the SMB servers running on your network by using the ___ program.

-d

You can set sendmail to generate and log various amounts of debugging data using the ___ command-line option.

-h

You can use that whois server in another whois command with the ___ option to get further details about a specific domain.

guestuser

You define a guest user with the ___________ directive.

Virtual

___ hosting is the feature of Apache that lets a single Apache server handle more than one Web site.

LISTSERV

___ is the most widely used MLM (mailing list manager) in the world, with more than 100 million subscribers being served.

Root

___ name servers are DNS servers that have been designated as a starting point for DNS queries.

Real

___ users can work in any directory of the filesystem they could access when logging on normally to Linux.

Name

___-based virtual hosting is the most common way of doing virtual hosting

SWAT

__________ is a browser-based graphical interface that sets up the smb.conf file, restarts the Samba servers, and provides some status information on how the server is being used.

Dynamic

__________ routing is the process of using a routing protocol to build and modify routing tables automatically based on information shared by the routers.

.forward

common uses of ___ include forwarding email to another system when you prefer to receive your email at another host and piping your messages through a mail filter such as procmail.