18775719
Beschreibung
Quiz von Luiz Eduardo, aktualisiert more than 1 year ago
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Erstellt von Luiz Eduardo
vor mehr als 5 Jahre
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Frage 1
Frage
When connecting to an SSH server for the first time, its fingerprint is received and stored in a file, which is located at:
Antworten
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~/ .ssh/fingerprints
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~/ .ssh/id_dsa
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~/ .ssh/known_hosts
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~/ .ssh/id_dsa.pub
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~/ .ssh/gpg.txt
Frage 2
Frage
Where is the user foo’s procmail configuration stored, if home directories are stored in /home? Please enter the complete path to the file[blank_start].[blank_end]
Antworten
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/home/foo/.procmailrc
Frage 3
Frage
Postfix daemons can be chroot’d by setting the chroot flag in [blank_start]_______[blank_end]. (Supply only the filename, without a path)
Antworten
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master.cf
Frage 4
Frage
What is the default location for sendmail configuration files? (Please provide the complete path to the directory[blank_start])[blank_end]
Antworten
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/etc/mail
Frage 5
Frage
What command is used to print NFS kernel statistics? (Provide the command with or without complete path)[blank_start]_______[blank_end]
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nfsstat
Frage 6
Frage
What is the name of the module in Apache that provides the HTTP Basic Authentication functionality? (Please provide ONLY the module name) [blank_start]___[blank_end]
Antworten
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mod_auth
Frage 7
Frage
In which directory can all parameters available to sysctl be found? (Provide the full path)[blank_start]____[blank_end]
Antworten
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/proc/sys
Frage 8
Frage
This program has 3 operating modes: copy-in mode, copy-out mode, and copy-pass mode, and is used to copy files into or out of archives. What program is this?
(Please provide the command name only, with no arguments or path.) [blank_start]___[blank_end]
Antworten
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cpio
Frage 9
Frage
The command [blank_start]___________[blank_end] -x foo will delete the user foo from the Samba database. (Specify the command only, no path information.)
Antworten
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smbpasswd
Frage 10
Frage
What postfix configuration setting defines the domains for which Postfix will deliver mail locally? (Please provide only the configuration setting name with no other information[blank_start])[blank_end]
Antworten
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mydomain
Frage 11
Frage
What is the path to the global postfix configuration file? (Please specify the complete directory path and file name[blank_start])[blank_end]
Antworten
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/etc/postfix/main.cf
Frage 12
Frage
Which Samba-related command will show all options that were not modified using smb.conf and thus are set to their default values? Please enter the command and its parameter(s):[blank_start]___[blank_end]
Antworten
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testparm -v
Frage 13
Frage
Which site-specific configuration file for the shadow login suite must be modified to log login failures? Please enter the complete path to that file._[blank_start]__[blank_end]
Antworten
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/etc/login.defs
Frage 14
Frage
You are not sure whether the kernel has detected a piece of hardware in your machine. What command, without options or parameters, should be run to present the contents of the kernel ring-buffer?[blank_start]____[blank_end]
Antworten
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dmesg
Frage 15
Frage
You have installed some new libraries, but these are not available to programs and are not listed by lconfig -p. What file should the path to the libraries be added to, before running ldconfig? [blank_start]____[blank_end]
Antworten
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ld.so.conf
Frage 16
Frage
nfsd, portmap and [blank_start]________[blank_end] daemons must be running on an NFS server.
Antworten
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mountd
Frage 17
Frage
With which parameter in the smb.conf file can a share be hidden?[blank_start]__[blank_end]
Antworten
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browseable=no
Frage 18
Frage
Please enter the complete command to create a new password file for HTTP basic authentication (/home/http/data/web _passwd) for user john.
htpasswd -c /home/http/data/web_passwd john
Antworten
- True
- False
Frage 19
Frage
Please enter the command used to remove Kerberos tickets from the cache below.[blank_start]__[blank_end]
Antworten
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kdestroy
Frage 20
Frage
All machines outside the network are able to send emails through the server to addresses not served by that server. If the server accepts and delivers the email, then it is a(n) [blank_start]_____________[blank_end]. Please enter the English term, without any punctuation.
Antworten
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open relay
Frage 21
Frage
Which command can be used to save the current iptables rules into a file? Please enter only the command without path or parameters.[blank_start]_[blank_end]
Antworten
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iptables-save
Frage 22
Frage
Which file on a Postfix server modifies the sender address for outgoing e-mails? Please enter only the file name without the path.[blank_start]___[blank_end]
Antworten
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sender_canonical
Frage 23
Frage
Running tcpdump -nli eth1 ‘icmp’ shows the following output:
11:56:35.599063 IP 192.168.123.5 > 194.25.2.129: icmp 64: echo request seq 1
11:56:35.670910 IP 194.25.2.129 > 192.168.123.5: icmp 64: echo reply seq 1
What command was used on the host 192.168.123.5, to generate this output?[blank_start]__[blank_end]
Antworten
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ping
Frage 24
Frage
Which command can be used to change the password for an LDAP entry?[blank_start]__[blank_end]
Antworten
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ldappasswd
Frage 25
Frage
In which directory are the PAM modules stored?[blank_start]__[blank_end]
Antworten
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/lib/security
Frage 26
Frage
What file should be edited to make the route command show human-readable names for networks? (Please enter the full path)[blank_start]___[blank_end]
Antworten
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/etc/networks
Frage 27
Frage
Which keys are stored in the authorized_keys file?
Antworten
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public
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private
Frage 28
Frage
To allow X connections to be forwarded from or through an SSH server, what line must exist in the sshd configuration file?
X11Forwarding yes
Antworten
- True
- False
Frage 29
Frage
A malicious user has sent a 35MB video clip, as an attachment, to hundreds of Recipients. Looking in the outbound queue reveals that this is the only mail there.This mail can be removed with the command rm [blank_start]_______________[blank_end] * . Complete the path below.
Antworten
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/var/spool/mqueue/
Frage 30
Frage
Which file, in the local file-system, is presented when the client requests http://server/~joe/index.html and the following directive is present in server’s Apache configuration file? UserDir site/html
Given that all users have their home directory in /home, please type in the FULL file name including the path.
Answer: /home/joe/site/html/index.html
Antworten
- True
- False
Frage 31
Frage
Which port must be open on a firewall, to allow a DNS server to receive queries? (Enter only the port number).
Antworten
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56
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63
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8080
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53
Frage 32
Frage
The users of the local network complain that name resolution is not fast enough. Enter the command, without the path or any options, that shows the time taken to resolve a DNS query[blank_start].[blank_end]
Antworten
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dig
Frage 33
Frage
37 In which configuration file can a key-file be defined to enable secure DNS zone transfers? (Please enter the file name without the path)[blank_start]__[blank_end]
Antworten
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named.conf
Frage 34
Frage
Which type of DNS record defines which server(s) email for a domain should be sent to?
Answer: MX
Antworten
- True
- False
Frage 35
Frage
Using only commands included with named, what is the command, with options or parameters, to make named re-read its zone files?[blank_start]_[blank_end]
Antworten
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rndc reload
Frage 36
Frage
Which daemon is required on the client if an ethernet device gets its IP address from a central server?__
Antworten
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dhcp
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dhcpcd
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bootpd
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ethd
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dhcpd
Frage 37
Frage
A network has many network printers connected and they should get their addresses using DHCP. What information from each printer is needed to always assign them the same IP address when dhcpd is used as the DHCP server?
Antworten
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MAC address
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Host name
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Serial number
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Factory default IP address
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Built-in network card type
Frage 38
Frage
Select the alternative that shows the correct way to disable a user login (except for root)
Antworten
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The use of the pam_nologin module along with the /etc/login configuration file
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The use of the pam_deny module along with the /etc/deny configuration file
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The use of the pam_pwdb module along with the /etc/pwdb.conf configuration file
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The use of the pam_console module along with the /etc/security/console.perms configuration file
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The use of the pam_nologin module along with the /etc/nologin configuration file
Frage 39
Frage
Which command would release the current IP address leased by a DHCP server?
Antworten
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ipconfig /release
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ifconfig –release-all
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dhclient -r
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ifconfig –release
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pump –release
Frage 40
Frage
Which records must be entered in a zone file in order to use "Round Robin Load Distribution" for a web server?
Antworten
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www.example.org. 60 IN A 192.168.1.1 www.example.org. 60 IN A 192.168.1.2 www.example.org. 60 IN A 192.168.1.3
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www.example.org. 60 IN A 192.168.1.1;192.168.1.2;192.168.1.3
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www.example.org. 60 IN A 192.168.1-3
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www.example.org. 60 IN RR 192.168.1:3
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www.example.org. 60 IN RR 192.168.1.1;192.168.1.2;192.168.1.3
Frage 41
Frage
Which of these tools can provide the most information about DNS queries?
Antworten
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dig
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nslookup
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host
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named-checkconf
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named-checkzone
Frage 42
Frage
Which command line create an SSH tunnel for POP and SMTP protocols?
Antworten
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ssh- L :110 -L :25 -1 user -N mailhost
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ssh -L 25:110 -1 user -N mailhost
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ssh -L mailhost:110 -L mailhost:25 -1 user -N mailhost
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ssh -L mailhost:25:110 -1 user
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ssh -L 110:mailhost:110 -L 25:mailhost:25 -1 user -N mailhost
Frage 43
Frage
An iptables firewall was configured to use the target MASQUERADE to share a dedicated wireless connection to the Internet with a few hosts on the local network.
The Internet connection becomes very unstable in rainy days and users complain their connections drop when downloading e-mail or large files, while web browsing seems to be working fine.
Which change to your iptables rules could alleviate the problem?
Antworten
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Change the target MASQUERADE to SNAT
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Change the target MASQUERADE to DNAT
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Change the target MASQUERADE to BALANCE and provide a backup Internet connection
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Change the target MASQUERADE to REDIRECT and provide a backup Internet connection
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Change the target MASQUERADE to BNAT
Frage 44
Frage
Connecting to a remote host on the same LAN using ssh public-key authentication works but forwarding X11 doesn’t. The remote host allows access to both services. Which of the following can be the reason for that behaviour?
Antworten
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The remote user’s ssh_config file disallows X11 forwarding
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A different public key has to be used for X11
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The remote server’s sshd_config file disallows X11 forwarding
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X11 cannot be forwarded if public-key authentication was used
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X11 though SSH needs a special X11 server application installed
Frage 45
Frage
Which THREE of the following actions should be considered when a FTP chroot jail is created?
Antworten
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Create /dev/ and /etc/ in the chroot enviroment
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Create /etc/passwd in the chroot enviroment
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Create /var/cache/ftp in the chroot enviroment
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Create the user ftp in the chroot enviroment
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Create /usr/sbin/ in the chroot enviroment
Frage 46
Frage
To be able to access the server with the IP address 10.12.34.56 using HTTPS, a rule for iptables has to be written. Given that the client host’s IP address is 192.168.43.12, which of the following commands is correct?
Antworten
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iptables – A FORWARD -p tcp -s 0/0 -d 10.12.34.56 –dport 80 -j ACCEPT
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iptables – A FORWARD -p tcp -s 192.168.43.12 d 10.12.34.56:443 -j ACCEPT.
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iptables – A FORWARD -p tcp -s 192.168.43.12 -d 10.12.34.56 –dport 443 -j ACCEPT.
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iptables – A INPUT -p tcp -s 192.168.43.12 – d 10.12.34.56:80 -j ACCEPT.
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iptables – A FORWARD -p tcp -s 0/0 -d 10.12.34.56 –dport 443 -j ACCEPT.
Frage 47
Frage
When the default policy for the iptables INPUT chain is set to DROP, why should a rule allowing traffic to localhost exist?
Antworten
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All traffic to localhost must always be allowed.
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It doesn’t matter; iptables never affects packets addressed to localhost
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Sendmail delivers emails to localhost
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Some applications use the localhost interface to communicate with other applications.
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syslogd receives messages on localhost
Frage 48
Frage
A server is being used as a smurf amplifier, whereby it is responding to ICMP Echo-Request packets sent to its broadcast address. To disable this, which command needs to be run?
Antworten
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ifconfig eth0 nobroadcast
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echo "0" > /proc/sys/net/ipv4/icmp_echo_accept_broadcasts
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iptables -A INPUT -p icmp -j REJECT
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echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
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echo "1" > /proc/sys/net/ipv4/icmp_echo_nosmurf
Frage 49
Frage
To allow X connections to be forwarded from or through an SSH server, what configuration keyword must be set to yes in the sshd configuration file?
Antworten
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AllowForwarding
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ForwardingAllow
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XllForwardingAllow
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XllForwarding
Frage 50
Frage
Which of the following options are valid in /etc/exports? (Choose two.)
Antworten
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rw
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ro
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rootsquash
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norootsquash
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uid
Frage 51
Frage
Which of the following nmap parameters scans a target for open TCP ports? (Choose two.)
Antworten
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-sO
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-sZ
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-sT
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-sU
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-sS
Frage 52
Frage
Which of the following commands can be used to connect and interact with remote TCP network services?
(Choose two.)
Antworten
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nettalk
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nc
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telnet
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cat
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netmap
Frage 53
Frage
Which BIND option should be used to limit the IP addresses from which slave name servers may connect?
Antworten
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allow-zone-transfer
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allow-transfer
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allow-secondary
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allow-slaves
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allow-queries
Frage 54
Frage
What option for BIND is required in the global options to disable recursive queries on the DNS server by default?
Antworten
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allow-recursive-query ( none; );
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allow-recursive-query off;
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recursion { disabled; };
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recursion { none; };
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recursion no;
Frage 55
Frage
Which option within a Nginx server configuration section defines the file system path from which the content of the server is retrieved?
Antworten
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location
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htdocs
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DocumentRoot
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root
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base_dir
Frage 56
Frage
What directive can be used in named.conf to restrict zone transfers to the 192.168.1.0/24 network?
Antworten
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allow-transfer { 192.168.1.0/24; };
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allow-transfer { 192.168.1.0/24 };
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allow-axfr { 192.168.1.0/24; };
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allow-axfr { 192.168.1.0/24 };
Frage 57
Frage
To securely use dynamic DNS updates, the use of TSIG is recommended. Which TWO
Antworten
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TSIG is used for zone data encryption
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TSIG is a signal to start a zone update
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TSIG is used in zone files
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TSIG is used only in server configuration
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Servers using TSIG must be in sync (time zone!)
Frage 58
Frage
Which option is used to configure pppd to use up to two DNS server addresses provided by the remote server?
Antworten
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ms-dns
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nameserver
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usepeerdns
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dns
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None of the above
Frage 59
Frage
A DNS server has the IP address 192.168.0.1. Which TWO of the following need to be done on a client machine to use this DNS server?
Antworten
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Add nameserver 192.168.0.1 to /etc/resolv.conf
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Run route add nameserver 192.168.0.1
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Run ifconfig eth0 nameserver 192.168.0.1
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Run echo “nameserver 192.168.1.1” >> /etc/resolv.conf
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Run bind nameserver 192.168.1.1
Frage 60
Frage
There is a restricted area in an Apache site, which requires users to authenticate against the file /srv/ www/security/site-passwd. Which command is used to CHANGE the password of existing users, without losing data, when Basic authentication is being used.
Antworten
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htpasswd -c /srv/www/security/site passwd user
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htpasswd /srv/www/security/site-passwd user
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htpasswd -n /srv/www/security/site-passwd user
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htpasswd -D /srv/www/security/site-passwd user
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None of the above
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