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Exam Code: EX300
Exam Name: Red Hat Certified Engineer (RHCE)
Q&As: 36
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Pass4itsure RedHat EX300 Dumps Exam Questions – 100% Success Guaranteed
Exam Times:
RHCE: Two hours.
Pass Scores:
Total 300 points. Pass at 210 points.
Exam Environment:
Take examinations on a real system with a pre‐installed virtual machine.
All exams must be completed in the virtual machine.
Network must be well configured. If the network cannot be accessed, you will not
pass the EX300 exam.
In the iptables configuration, if you need to refuse the access, please use “Reject”.
(The default is set as ACCEPT.)
Note:
Your IP address, Host Name, Gateway and DNS has been configured.
IP address: 172.24.30.5/24
Hostname: station.domain30.example.com
vim /etc/hosts
172.24.30.5 station.domain30.example.com
Add the corresponding relation between the host name and IP in the hosts records.
You are a member of the domain30.example.com host domain, another domain is
t3gg.com‐‐‐172.25.0.0/16 network.
QUESTION 1
To ensure SELinux open after the boot:
Answer:
vim /etc/sysconfig/selinux
selinux=enforcing
setenforce 1
getenforce
QUESTION 2
Open system kernel forwarding packets function:
EX300 dumps Answer:
vim /etc/sysctl.conf
net.ipv4.ip_forward = 1
sysctl ‐w (Effective immediately)
The following commands should executed without sysctl.conf option:
sysctl ‐a |grep net.ipv4
sysctl ‐P net.ipv4.ip_forward = 1
sysctl ‐w
QUESTION 3
Configure SSH access as follows:
Harry has remote SSH access to your machine from within example.com
Clients within t3gg.com should NOT have access to ssh on your system
Answer:
yum install ‐y sshd
chkconfig sshd on
vim /etc/hosts.deny
sshd: 172.25.0.0/16
Use iptables:
iptables ‐F
iptables ‐X
iptables ‐Z
iptables ‐nvL
iptables ‐A INPUT ‐s 172.25.0.0/16 ‐p tcp ‐dport 22 ‐j REJECT
services iptables save
Each finished writing a iptables rules saved
iptables ‐nvL
cat / etc / services can be used to view port
EX300 pdf If wrong, can be modified in vim / etc / sysconfig / iptables
QUESTION 4
Configure FTP access as follows:
Download from catalog: / var / ftp / pub using anonymous is allowed
Clients within t3gg.com should NOT have access to FTP on your system
Answer:
yum install ‐y vsftpd
chkconfig vsftpd on
services vsftpd start
Deny: uninstall hosts.deny or use iptables
vim /etc/hosts.deny
vsftpd: 172.25.0.0/16
iptables ‐A INPUT ‐s 172.25.0.0/16 ‐p tcp ‐dport 20:21 ‐j REJECT
services iptables save
QUESTION 5
Mount /root/cdrom.iso under /opt/data, and take effect automatically at boot‐start
Answer:
cd /opt/
mkdir data
mount ‐t iso9660 ‐o loop /root/cdrom.iso /opt/data
vim /etc/fstab
/root/cdrom.iso /opt/data iso9660 defaults,loop 0 0
QUESTION 6
Configure Web server as follow:
Clients within http://station.domain30.example.com should have access to Web
server on your system
EX300 vce Answer:
yum install ‐y httpd
chkconfig httpd on
cd /etc/httpd/conf/
vim httpd.conf
NameVirtualHost 172.24.30.5:80
<VirtualHost 172.24.30.5:80>
DocumentRoot /var/www/html/
ServerName tation.domain30.example.com
</VirtualHost>
service httpd restart
QUESTION 7
Build a web server to enable the virtual host. So http://www.domain30.example.com
able to access to the page / www / virtual directory, download from
http://ip/dir/example.html. And ensure, http://station.domain30.example.com also
be access to the contents of.
Answer:
mkdir ‐p /www/virtual
cd /www/virtual
wget http://ip/dir/example.com
cp example.com index.html
se manage fcontext ‐a ‐t httpd_sys_content_t ‘/www(/.*)?’
restorecon ‐vRF /www
vim /etc/httpd/conf/httpd.conf (Create a new host)
<VirtualHost 172.24.30.5:80>
DocumentRoot /www/virtual/
ServerName www.domain30.example.com
</VirtualHost>
service httpd restart
Verify with elinks
Other kinds of questions:
Download files from http://ip/dir/restircted.html. Local user have access to it
through http://dtop30.dn.ws.com/restircted, but Clients within remote.com should
NOT have access to it.
htpasswd ‐cm /etc/httpd/.htpasswd sisi
htpasswd ‐m /etc/httpd/.htpasswd tami
<VirtualHost 172.24.30.5:80>
DocumentRoot /www/virtual/
ServerName www.domain30.example.com
<Directory “/www/virtual/”>
AuthName “www.domain30.example.com”
AuthType basic
AuthUserFile /etc/httpd/.htpasswd
Require valid‐user
</Directory>
</VirtualHost>
services httpd restart
QUESTION 8
Download files from http://ip/dir/restircted.html. Local users have access to it
through estircted, but Clients within
t3gg.com should NOT have access to it.
EX300 exam Answer:
cd /var/www/html
wget http://ip/dir/restircted.htm
iptables ‐A INPUT ‐s 172.25.0.0/16 ‐p tcp ‐dport 80 ‐j REJECT
service iptables save
QUESTION 9
Configure NFS server to share /common directory with domain30.example.com.
Authenticate the clients devices have the access to it as root user.
Answer:
yum install ‐y nfs
chkconfig nfs on
chkconfig rpcbind on
vim /etc/exports
/common 172.24.30.0/255.255.255.0 (rw,no_root_squash)
showmount ‐e 172.16.30.5
mount ‐t nfs 172.16.30.5:/common /mnt
QUESTION 10
Configuring samba server, shared / common, and can browse to the. User harry
shared read‐only, if necessary, harry users password for harryuser were.
EX300 dumps Answer:
yum install ‐y postfix
chkconfig smb on
useradd harry
smbpasswd ‐a harry
vim /etc/samba/smb.conf
[common]
comment = common
path = /common
browseable = yes read only = yes
testarpm
getsebool ‐a |grep samba_share_nfs
setsebool ‐P samba_share_nfs=1
services smb restart
mount ‐t cifs //172.16.30.5/common /mnt ‐o username=harry%harryuser
QUESTION 11
Configure an email server domian30.example.com, and it requests to send and
receive emails from the local server or the user harry can send or receive emails from
network. The email of user harry is /var/spool/mail/harry.
Please note: the DNS server has already been MX record.
Answer:
yum install ‐y postfix
chkconfig postfix on
vim /etc/postfix/main.cf
inet_interfaces = all
mydestination = example.com, domain30.example.com, localhost
mynetworks = 172.16.30.0/24, 127.0.0.1/8
services postfix restart
Test:
netstat ‐tulnp |grep 25
hostname
echo hello |mail ‐s “test”[email protected]
cat /var/spool/mai/harry
QUESTION 12
Connect to mail server and send email to admin, ensure that user harry can revive it.
EX300 pdf Answer:
vim /etc/aliases
admin: harry
newaliases
QUESTION 13
Configure Kernel parameters rhelblq=1 and enable /proc/cmdline to verify your
Kernel parameters.
Answer:
Vim /etc/grub.conf
Write the end of the kernel line
To see after restart
cat /proc/cmdline
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