Dns server in packet tracer by tanjilur rahman city university bangladesh
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The document describes how to set up a DNS server in Packet Tracer to translate domain names to IP addresses. It involves building a network topology with a server and two PCs, configuring static IP addresses for each with the server acting as the DNS server, and testing domain name resolution by pinging hosts by name. When successful, the DNS service is resolving names to IP addresses correctly.
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Configuration of mail server on cisco packet tracer1 converted
This document provides instructions for configuring a mail server on Cisco Packet Tracer. It involves setting up 3 laptops, a mail server, and a DNS server on a single network switch. The mail server is assigned IP 192.168.1.1 and DNS server 192.168.1.2. On the mail server, a domain name is selected and SMTP and POP3 services are enabled. Usernames and passwords are created. Then on the DNS server, the same domain name and mail server IP are provided. Finally, mail can be sent and received on the laptops using the accounts configured on the mail server.
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3. Configure DNS services of the server.
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This document provides instructions for configuring a mail server on Cisco Packet Tracer. It involves setting up 4 PCs, a mail server, and a DNS server connected by a switch. IP addresses are assigned to each device on the same subnet. The mail server is configured with a domain name and SMTP/POP3 services enabled. Usernames and passwords are created. The DNS server is then configured with the same domain name and IP address as the mail server. Users are then able to send and receive emails between PCs using the mail server after setting up their mail client with the credentials created on the mail server.
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1) Build a network topology with PCs and a server
2) Configure static IPs for each device and set the DNS server address
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Basic Security
@ Updates
-Update manager
-Enable automatic security updates(Update Setting)
=> Super windows => type the key word (System Setting) =>
@ Firewall
-In Ubuntu all ports are block by default
-Default firewall-ufw (turned off by default)
+sudo ufw status
+sudo ufw enable/disable
-Firestarter for graphical interface (recommanded)
+sudo apt-get install firestarter
+Preferences
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+Disable user guest
-Do not use root user (Disable by default)
+sudo passwd
+sudo passwd -l root (disable/changed expiry password)
-Use sudo instead of root (/etc/sudoers)
+sudo visudo OR sudo gedit /etc/sudoers(To set the privilege user authorized)
+sudo adduser tolaleng sudo
-Deleting Users
+sudo deluser canamall
-Removing world readable permission to home directory
+sudo chmod 0750 /home/username
-Locking/Unlocking user
+sudo passwd -l username (enable user expiry)
+sudo passwd -u username (disable user expiry)
-passwords
+sudo chage canamall (Set the password expiration)
+sudo chage-l canamall (show the password expiration)
@ Antivirus
-Clam TK (Under Accessories), other anti-virus
@ Unistall Applications
-Ubuntu Software Center-> Installed software section-> Select application and click remove
@ Processes
-To see processes
+ps aux or top
+system monitor(cacti, nagios,)
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@ Logs
-Some of logs
+ /var/log/messages : general log messages
+ /var/log/boot : system boot log
+ /var/log/debug/ : debugging log messages
+ /var/log/auth.log : user login and authentication logs
+ /var/log/daemon.log : running services such as squid,ntpd and other log message to this file
+ /var/log/kern.log : kernel log file
-Viewing logs
+ tail, more, cat, less, grep
+ GNOME system log viewer
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* Create Standard User and enable user passwd (complexity password, strong passwd, passwd expired, invalid day of passwd, Lock and Unlock user, disable user Guest, )
* Secure remote network and host
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-Amanda
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1. The document discusses how to configure a firewall on CentOS 8 using firewalld and firewall-cmd. It covers installing and enabling firewalld, exploring the default firewall rules and zones, adding services and ports, and creating custom firewall zones.
2. Key steps include installing firewalld, enabling it to start at boot, checking the status and default zones, listing rules for default and other zones, adding or removing services and ports, and creating custom firewall zones tailored for specific uses.
3. Custom firewall zones can be more descriptive than default zones for separating interfaces by function, like a "public" zone only for web servers.
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A DNS server translates domain names to IP addresses, allowing clients to connect to origin servers. The document provides instructions on configuring a DNS server in Packet Tracer:
1) Build a network topology with PCs and a server
2) Configure static IPs for each device and set the DNS server address
3) Enable DNS service on the server and define name-IP mappings for each host
4) Test domain name resolution by pinging hosts by name instead of IP.
Dns server converted
A DNS server translates domain names to IP addresses, allowing clients to reach servers. The document provides instructions to configure a DNS server in Packet Tracer:
1. Build a network topology with a server and two PCs, and configure static IP addresses for each.
2. Configure the server as the DNS server for the PCs by adding DNS entries that map the names and IP addresses of each device.
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This document provides instructions for configuring a mail server on Cisco Packet Tracer. It involves setting up 4 PCs, a mail server, and a DNS server connected by a switch. IP addresses are assigned to each device on the same subnet. The mail server is configured with a domain name and SMTP/POP3 services enabled. Usernames and passwords are created. The DNS server is then configured with the same domain name and IP address as the mail server. Users are then able to send and receive emails between PCs using the mail server after setting up their mail client with the credentials created on the mail server.
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Basic security & info
Basic Security
@ Updates
-Update manager
-Enable automatic security updates(Update Setting)
=> Super windows => type the key word (System Setting) =>
@ Firewall
-In Ubuntu all ports are block by default
-Default firewall-ufw (turned off by default)
+sudo ufw status
+sudo ufw enable/disable
-Firestarter for graphical interface (recommanded)
+sudo apt-get install firestarter
+Preferences
@ User Accounts
-User & Groups
+Disable user guest
-Do not use root user (Disable by default)
+sudo passwd
+sudo passwd -l root (disable/changed expiry password)
-Use sudo instead of root (/etc/sudoers)
+sudo visudo OR sudo gedit /etc/sudoers(To set the privilege user authorized)
+sudo adduser tolaleng sudo
-Deleting Users
+sudo deluser canamall
-Removing world readable permission to home directory
+sudo chmod 0750 /home/username
-Locking/Unlocking user
+sudo passwd -l username (enable user expiry)
+sudo passwd -u username (disable user expiry)
-passwords
+sudo chage canamall (Set the password expiration)
+sudo chage-l canamall (show the password expiration)
@ Antivirus
-Clam TK (Under Accessories), other anti-virus
@ Unistall Applications
-Ubuntu Software Center-> Installed software section-> Select application and click remove
@ Processes
-To see processes
+ps aux or top
+system monitor(cacti, nagios,)
-
@ Logs
-Some of logs
+ /var/log/messages : general log messages
+ /var/log/boot : system boot log
+ /var/log/debug/ : debugging log messages
+ /var/log/auth.log : user login and authentication logs
+ /var/log/daemon.log : running services such as squid,ntpd and other log message to this file
+ /var/log/kern.log : kernel log file
-Viewing logs
+ tail, more, cat, less, grep
+ GNOME system log viewer
@Firewall
ufw
=> Security Host
* Create Standard User and enable user passwd (complexity password, strong passwd, passwd expired, invalid day of passwd, Lock and Unlock user, disable user Guest, )
* Secure remote network and host
-Telnet(Secure with the host and address connection)
-SSH (Secure with the authentication encryption key)
=> Security Backup (Data Hosting)
*Make a Full Backup of Your Machine
-Aptik (backup application)
-rsync (Remote synce)
-Gsync (Remote)
-Amanda
-Rsnapshot
DNS server packet tracer
The document describes how to configure a DNS server in Packet Tracer. It involves setting static IP addresses on PCs and a server, configuring the DNS server address for each device, enabling and configuring the DNS service on the server to map host names to IP addresses, and testing domain name resolution by pinging hosts by name.
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Introduction:-
The world today runs on fastest means of communication. One way to communicate quickly is by using electronic mail or email. It has become the essence of any business and without it they have hard time functioning. Due to this fact we need reliable email servers to ensure that our email is processed correctly and either delivered or receive on time. In Red Hat enterprise Linux send mail is default for sending mail and Dovecot is default for receiving mails.
Email Services:-
Email system is divided in three different parts MUA, MDA and MTA. The MUA mail user agent deals with end users, it helps creating and reading the mails they receive, examples are Mozilla Thunderbird, Evolution and Microsoft Outlook Express. MDA the mail delivery agent it handles the mails and delivers them to the destination. it take mails from receiving server place them in the spool from where the MUA picks it up .MTA mail transfer agent is responsible for transferring the mail from one server to another .
SMTP with Postfix:-
Red Hat provide both send mail and postfix as SMTP server. We use Postfix as SMTP server because it is easier to configure , administer , allows increased security and support virtual domains. Postfix is also a default SMTP server in Red Hat Enterprise Linux 6.
Postfix Server profile:-
Rpm- postfix.
Service- postfix
Port- TCP 25
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In this practice you will be able:
-Configure Primary DNS and Secondary DNS
-Configure DNS zone transter
-DNS Delegation
-DNS Security zone transfer
-Configure also Linux(Sles 11) and Windows Server 2008R2
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Similar to Dns server in packet tracer by tanjilur rahman city university bangladesh
Dns server in packet tracer converted (labanna saha)
A DNS server translates domain names to IP addresses, allowing clients to connect to origin servers. The document provides instructions on configuring a DNS server in Packet Tracer:
1) Build a network topology with PCs and a server
2) Configure static IPs for each device and set the DNS server address
3) Enable DNS service on the server and define name-IP mappings for each host
4) Test domain name resolution by pinging hosts by name instead of IP.
Dns server converted
A DNS server translates domain names to IP addresses, allowing clients to reach servers. The document provides instructions to configure a DNS server in Packet Tracer:
1. Build a network topology with a server and two PCs, and configure static IP addresses for each.
2. Configure the server as the DNS server for the PCs by adding DNS entries that map the names and IP addresses of each device.
3. Test domain name resolution by pinging devices by name instead of IP address. Successful pings confirm the DNS server is functioning properly.
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A DNS server is a computer server that contains a database mapping domain names to IP addresses. It translates domain names to IP addresses, allowing clients to reach servers. It communicates with other DNS servers using special protocols. The document provides instructions for configuring a local network with one server acting as a DNS server, including setting static IP configurations and defining hostnames and addresses in the DNS server database. It concludes by suggesting testing domain name resolution by pinging hosts by name.
Dns server
A DNS server is a computer server that contains a database mapping domain names to IP addresses. It translates domain names to IP addresses, allowing clients to access websites and resources. The DNS server stores hostname and IP address mappings and communicates with other DNS servers using special protocols to resolve domain names into IP addresses for clients.
main
The presentation summarizes DNS, SMTP, and POP3 protocols. It discusses configuring a local host file to map IP addresses to hostnames, setting up a DNS server using Bind on Windows 7, and interacting with an email server using SMTP and POP3 commands via Telnet. The objectives are to resolve hostnames, configure DNS, and send emails between mailboxes on the email server. Requirements include networked PCs and servers running Windows 7 with TCP/IP and an email server configured with user mailboxes.
DNS,SMTP and POP3
The presentation discusses DNS, SMTP, and POP3 protocols. It provides instructions on configuring a DNS server on Windows 7, including downloading and installing BIND, creating configuration files, and testing the DNS server. It also describes using Telnet and SMTP commands to send emails between servers, and creating a batch file to automate email messaging through the command prompt.
Networking DHCP server Setup Reports
DHCP stands for dynamic host configuration protocol. What it does is dynamically assign network settings from a server. In other words, instead of having to configure the parameters related to how your computer communicates with a network, it happens automatically.
Assigning an IP address dynamically is the most basic piece but there is a lot more to DHCP. This includes the netmask, host name, domain name, gateway and name servers. In addition, DHCP can supply other information such as a time server.
Many people are anti-DHCP, because they see it as a way that an ISP offers you an IP address that changes. This, of course, makes it difficult to advertise a server. On the other hand, DHCP can save you a lot of ongoing configuration work within your company or organization.
06 coms 525 tcpip - dhcp and dns
The Domain Name System (DNS) is a hierarchical distributed database that maps domain names to IP addresses. It uses a client-server model where clients submit queries and servers respond authoritatively. DNS provides mapping from human-readable domain names to numerical IP addresses to make the internet easier to use. It is a critical service that enables users to access internet resources by name.
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The document discusses how Network Address Translation (NAT) and Port Address Translation (PAT) can help solve the problem of limited IP addresses by allowing private IP addresses to be translated to public IP addresses, and describes how to configure various NAT and PAT functions on a Cisco router including static NAT, dynamic NAT, port overloading, and handling overlapping networks.
3. reverse primarydns using bind for ptr and cname record ipv6
This document describes how to configure a primary DNS server on Linux using BIND to serve PTR records for reverse DNS lookups of IPv6 addresses. It involves installing BIND, configuring named.conf to define zones for IPv6 address blocks, creating zone files with PTR records, and testing lookups. Key steps include defining options and zones in named.conf, copying an existing zone file and modifying it to include PTR records that map IPv6 addresses to domain names, and restarting BIND. This allows the server to resolve IPv6 addresses to names and function as the primary DNS server for its defined zones.
Uccn1003 -may10_-_lect02b2_-_lan_basic_in_packet_tracer
The document outlines the steps to add a second LAN to an existing network in Packet Tracer, including:
- Adding a switch, two PCs, and a server to the new LAN
- Configuring the switch, server, and router interfaces with static IP addresses
- Setting up DHCP, DNS, and HTTP services on the server to provide IP addresses, domain name resolution, and a web page for the new LAN
- Testing connectivity between the new LAN components and the existing LAN to validate the new network configuration
Dhcp & dhcp relay agent in cent os 5.3
This document discusses configuring a DHCP server and DHCP relay agent for network infrastructure. It provides instructions on installing and configuring a DHCP server to provide IP addresses, subnet masks, and other network configurations to clients from a specific IP range. It also describes installing and configuring a DHCP relay agent to forward DHCP requests from clients without a local DHCP server to DHCP servers on other subnets. The document gives step-by-step guidance on setting up both the DHCP server and relay agent, and testing that clients receive IP addresses as expected.
DHCP SERVER
This document discusses configuring a DHCP server and DHCP relay agent for network infrastructure. It provides instructions on installing and configuring a DHCP server to provide IP addresses, subnet masks, and other network configurations to clients from a specific IP range. It also describes how to configure a DHCP relay agent to forward DHCP requests from clients without a local DHCP server to DHCP servers on other subnets. The document gives step-by-step guidance on setting up both the DHCP server and relay agent, and testing that clients receive IP addresses as expected.
M7 - Manual
1. The document explains the function of a DNS system using an example of connecting a school computer to www.yahoo.com. It describes how the client's request is first sent to an authoritative name server that resolves DNS names and finds IP addresses. If the name is not found, the request is passed to a root server that can find the associated name and IP address. Once the IP is found, the client computer can connect via IP to the destination website.
2. It then asks questions about the domain web.av.salesians.cat, defining an authoritative name server, host name, top-level domain (TLD), subdomain, and fully qualified domain name (FQDN).
3
Soal it pc networking support -lkslamsel-2016
The document provides instructions for contestants to create a computer network with various servers and configurations. Contestants will set up client computers running Windows 7, and configure networking settings like IP addresses and partitions. They will then install Debian on servers for a router, DNS, HTTP, proxy, DHCP, NTP, FTP, mail, and web mail servers. The servers will be configured according to the instructions, like blocking specific websites on the proxy server. Cables will be made and labeled to connect all systems.
Soal lks networking support 2013 SMK N 1 Binangun
The document describes tasks for setting up a local internet e-learning network for a vocational school in Jakarta. The tasks include assembling PC servers and clients, installing operating systems, configuring networking components like routers, DHCP, DNS, firewalls, mail servers, and troubleshooting connectivity issues. The network is to support an e-learning project allowing only specific student IP addresses to access course content within fixed time windows.
IP Layer.pptx
Bootstrap Protocol (BOOTP) is a networking protocol that automatically provides devices with IP addresses and other network configuration when connecting to a network. It uses DHCP and UDP to make address requests and handle responses. When a BOOTP client boots up, it broadcasts its MAC address as a request. The BOOTP server responds with an IP address, hostname, subnet mask, and other configuration details.
DHCP is an updated version of BOOTP that dynamically assigns IP addresses and other network configuration to devices on a network. A DHCP server manages a pool of IP addresses and provides them to clients through a four step request/offer process. DHCP offers benefits over static addressing like reduced errors and centralized management of addresses.
DNS is a
Configuring a DHCP Server
The document discusses configuring a DHCP server on Linux. It begins by explaining what DHCP is and its components. It then discusses installing the ISC DHCP server package and updating the system. The document outlines configuring the DHCP server through editing the configuration file to define options like the address pool and default gateway. It also discusses binding the server to an interface and starting the server. Finally, it shows testing the DHCP server by having another device request an IP address and checking the DHCP lease list to confirm the server assigned an address from the pool.
Module17 nat v2
Network Address Translation (NAT) allows hosts on private networks to communicate with hosts on the public Internet. NAT is run on routers and replaces the IP address and port of packets traveling between a private network and the public Internet. The main uses of NAT are pooling IP addresses, supporting migration between ISPs, IP masquerading, and load balancing servers. NAT solves issues like IP address exhaustion but breaks the end-to-end connectivity principle and can cause problems for applications that embed IP addresses.
DHCP.pptx
The document discusses DHCP (Dynamic Host Configuration Protocol). DHCP is a network protocol that dynamically assigns IP addresses to devices on a network. When a device connects to a network, it sends a DHCP request to obtain an IP address and other network configuration information from a DHCP server. This allows devices to connect to the network and communicate without needing manual configuration of IP addresses.
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- 1. DNS server in Packet Tracer Made by : Tanjilur Rahman City University, Bangladesh : DNS Means Domain Name System of a website. It About DNS Server translate the domain name into ip address. 1. Building A Network Topology: 2: Configure The Pcs And Server with static ip address. 1. Server’s ip Configuration:
- 2. Here, IP address: 70.70.0.0 Subnet mask: 255.255.255.0 Default gateway: 192.168.1.1 DNS Server: 192.168.1.2 2: PC 1
- 3. IP address: 192.168.1.3 Subnet mask: 255.255.255.0 Default gateway: 0.0.0.0 DNS Server: 192.168.1.2 3. Pc2
- 4. IP address: 192.168.1.4 Subnet mask: 255.255.255.0 Default gateway: 0.0.0.0 DNS Server: 192.168.1.1 At the last step, Test domain name – IP resolution. Ping the hosts from one another using their names instead of their IP addresses. If the DNS service is turned on and all IP configurations are okay, then ping should work. For example, ping PC1 from PC0. Ping should be successful.