18775719
Descripción
Test por Luiz Eduardo, actualizado hace más de 1 año
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Creado por Luiz Eduardo
hace más de 5 años
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Pregunta 1
Pregunta
When connecting to an SSH server for the first time, its fingerprint is received and stored in a file, which is located at:
Respuesta
-
~/ .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
Pregunta 2
Pregunta
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]
Respuesta
-
/home/foo/.procmailrc
Pregunta 3
Pregunta
Postfix daemons can be chroot’d by setting the chroot flag in [blank_start]_______[blank_end]. (Supply only the filename, without a path)
Respuesta
-
master.cf
Pregunta 4
Pregunta
What is the default location for sendmail configuration files? (Please provide the complete path to the directory[blank_start])[blank_end]
Respuesta
-
/etc/mail
Pregunta 5
Pregunta
What command is used to print NFS kernel statistics? (Provide the command with or without complete path)[blank_start]_______[blank_end]
Respuesta
-
nfsstat
Pregunta 6
Pregunta
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]
Respuesta
-
mod_auth
Pregunta 7
Pregunta
In which directory can all parameters available to sysctl be found? (Provide the full path)[blank_start]____[blank_end]
Respuesta
-
/proc/sys
Pregunta 8
Pregunta
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]
Respuesta
-
cpio
Pregunta 9
Pregunta
The command [blank_start]___________[blank_end] -x foo will delete the user foo from the Samba database. (Specify the command only, no path information.)
Respuesta
-
smbpasswd
Pregunta 10
Pregunta
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]
Respuesta
-
mydomain
Pregunta 11
Pregunta
What is the path to the global postfix configuration file? (Please specify the complete directory path and file name[blank_start])[blank_end]
Respuesta
-
/etc/postfix/main.cf
Pregunta 12
Pregunta
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]
Respuesta
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testparm -v
Pregunta 13
Pregunta
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]
Respuesta
-
/etc/login.defs
Pregunta 14
Pregunta
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]
Respuesta
-
dmesg
Pregunta 15
Pregunta
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]
Respuesta
-
ld.so.conf
Pregunta 16
Pregunta
nfsd, portmap and [blank_start]________[blank_end] daemons must be running on an NFS server.
Respuesta
-
mountd
Pregunta 17
Pregunta
With which parameter in the smb.conf file can a share be hidden?[blank_start]__[blank_end]
Respuesta
-
browseable=no
Pregunta 18
Pregunta
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
Respuesta
- True
- False
Pregunta 19
Pregunta
Please enter the command used to remove Kerberos tickets from the cache below.[blank_start]__[blank_end]
Respuesta
-
kdestroy
Pregunta 20
Pregunta
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.
Respuesta
-
open relay
Pregunta 21
Pregunta
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]
Respuesta
-
iptables-save
Pregunta 22
Pregunta
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]
Respuesta
-
sender_canonical
Pregunta 23
Pregunta
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]
Respuesta
-
ping
Pregunta 24
Pregunta
Which command can be used to change the password for an LDAP entry?[blank_start]__[blank_end]
Respuesta
-
ldappasswd
Pregunta 25
Pregunta
In which directory are the PAM modules stored?[blank_start]__[blank_end]
Respuesta
-
/lib/security
Pregunta 26
Pregunta
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]
Respuesta
-
/etc/networks
Pregunta 27
Pregunta
Which keys are stored in the authorized_keys file?
Respuesta
-
public
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private
Pregunta 28
Pregunta
To allow X connections to be forwarded from or through an SSH server, what line must exist in the sshd configuration file?
X11Forwarding yes
Respuesta
- True
- False
Pregunta 29
Pregunta
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.
Respuesta
-
/var/spool/mqueue/
Pregunta 30
Pregunta
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
Respuesta
- True
- False
Pregunta 31
Pregunta
Which port must be open on a firewall, to allow a DNS server to receive queries? (Enter only the port number).
Respuesta
-
56
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63
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8080
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53
Pregunta 32
Pregunta
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]
Respuesta
-
dig
Pregunta 33
Pregunta
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]
Respuesta
-
named.conf
Pregunta 34
Pregunta
Which type of DNS record defines which server(s) email for a domain should be sent to?
Answer: MX
Respuesta
- True
- False
Pregunta 35
Pregunta
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]
Respuesta
-
rndc reload
Pregunta 36
Pregunta
Which daemon is required on the client if an ethernet device gets its IP address from a central server?__
Respuesta
-
dhcp
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dhcpcd
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bootpd
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ethd
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dhcpd
Pregunta 37
Pregunta
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?
Respuesta
-
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
Pregunta 38
Pregunta
Select the alternative that shows the correct way to disable a user login (except for root)
Respuesta
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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
Pregunta 39
Pregunta
Which command would release the current IP address leased by a DHCP server?
Respuesta
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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
Pregunta 40
Pregunta
Which records must be entered in a zone file in order to use "Round Robin Load Distribution" for a web server?
Respuesta
-
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
Pregunta 41
Pregunta
Which of these tools can provide the most information about DNS queries?
Respuesta
-
dig
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nslookup
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host
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named-checkconf
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named-checkzone
Pregunta 42
Pregunta
Which command line create an SSH tunnel for POP and SMTP protocols?
Respuesta
-
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
Pregunta 43
Pregunta
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?
Respuesta
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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
-
Change the target MASQUERADE to REDIRECT and provide a backup Internet connection
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Change the target MASQUERADE to BNAT
Pregunta 44
Pregunta
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?
Respuesta
-
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
Pregunta 45
Pregunta
Which THREE of the following actions should be considered when a FTP chroot jail is created?
Respuesta
-
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
Pregunta 46
Pregunta
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?
Respuesta
-
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.
Pregunta 47
Pregunta
When the default policy for the iptables INPUT chain is set to DROP, why should a rule allowing traffic to localhost exist?
Respuesta
-
All traffic to localhost must always be allowed.
-
It doesn’t matter; iptables never affects packets addressed to localhost
-
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
Pregunta 48
Pregunta
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?
Respuesta
-
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
Pregunta 49
Pregunta
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?
Respuesta
-
AllowForwarding
-
ForwardingAllow
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XllForwardingAllow
-
XllForwarding
Pregunta 50
Pregunta
Which of the following options are valid in /etc/exports? (Choose two.)
Respuesta
-
rw
-
ro
-
rootsquash
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norootsquash
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uid
Pregunta 51
Pregunta
Which of the following nmap parameters scans a target for open TCP ports? (Choose two.)
Respuesta
-
-sO
-
-sZ
-
-sT
-
-sU
-
-sS
Pregunta 52
Pregunta
Which of the following commands can be used to connect and interact with remote TCP network services?
(Choose two.)
Respuesta
-
nettalk
-
nc
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telnet
-
cat
-
netmap
Pregunta 53
Pregunta
Which BIND option should be used to limit the IP addresses from which slave name servers may connect?
Respuesta
-
allow-zone-transfer
-
allow-transfer
-
allow-secondary
-
allow-slaves
-
allow-queries
Pregunta 54
Pregunta
What option for BIND is required in the global options to disable recursive queries on the DNS server by default?
Respuesta
-
allow-recursive-query ( none; );
-
allow-recursive-query off;
-
recursion { disabled; };
-
recursion { none; };
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recursion no;
Pregunta 55
Pregunta
Which option within a Nginx server configuration section defines the file system path from which the content of the server is retrieved?
Respuesta
-
location
-
htdocs
-
DocumentRoot
-
root
-
base_dir
Pregunta 56
Pregunta
What directive can be used in named.conf to restrict zone transfers to the 192.168.1.0/24 network?
Respuesta
-
allow-transfer { 192.168.1.0/24; };
-
allow-transfer { 192.168.1.0/24 };
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allow-axfr { 192.168.1.0/24; };
-
allow-axfr { 192.168.1.0/24 };
Pregunta 57
Pregunta
To securely use dynamic DNS updates, the use of TSIG is recommended. Which TWO
Respuesta
-
TSIG is used for zone data encryption
-
TSIG is a signal to start a zone update
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TSIG is used in zone files
-
TSIG is used only in server configuration
-
Servers using TSIG must be in sync (time zone!)
Pregunta 58
Pregunta
Which option is used to configure pppd to use up to two DNS server addresses provided by the remote server?
Respuesta
-
ms-dns
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nameserver
-
usepeerdns
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dns
-
None of the above
Pregunta 59
Pregunta
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?
Respuesta
-
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
Pregunta 60
Pregunta
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.
Respuesta
-
htpasswd -c /srv/www/security/site passwd user
-
htpasswd /srv/www/security/site-passwd user
-
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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