Remote VPN
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Remote VPNs allow secure access to corporate networks from remote locations by establishing an encrypted tunnel over the Internet. They provide secure communications and access rights tailored to individual users, enhancing productivity by extending corporate networks and applications while reducing costs and increasing flexibility. The example configuration shows a remote client (R1) connecting to a VPN server (R3) using IKE and IPsec to securely access resources on R3's network.
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For Thick Client
webvpn
svc image flash:/svc.pkg
svc enables
port 80
enable outside
tunnel-group admin general-attributes
default-group-policy grp1
tunnel-group-list enable
exit
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Recommended
SSL Web VPN
For Thick Client
webvpn
svc image flash:/svc.pkg
svc enables
port 80
enable outside
tunnel-group admin general-attributes
default-group-policy grp1
tunnel-group-list enable
exit
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This document provides instructions for configuring basic network security on a Cisco ASA 5506-x firewall. It outlines requirements for separating networks into an Internet, user, and DMZ segment. It then provides steps to update the ASA software, configure interfaces and security levels, enable internet access via NAT and routing, allow web access to servers on the DMZ, optionally configure DHCP, and optionally redirect traffic to the FirePOWER module. It also includes steps for hardening the device by shutting down unused interfaces, enabling SSH access, and configuring time and logging.
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Firewalls work by denying or permitting network traffic based on configured policies. A firewall protects internal networks from unauthorized external access and can also separate internal networks. Stateful firewalls are aware of network connections and maintain related information in a connection table, while stateless firewalls make decisions based only on individual packets.
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Switches direct and control much of the data flowing across computer networks.
Conventional network security often focuses more on routers and blocking traffic from the outside.
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limited or no security measures are applied.
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Презентация с вебинара, организованного в рамках сообщества Cisco Support Community.
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www.security-session.cz
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1. The document describes the configuration steps for a lab exercise involving BGP routing. It includes tasks to configure IP addresses, IBGP, HSRP, servers, and BGP routing on multiple routers as shown in the given topology diagram.
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- IPv6 adoption is important due to the depletion of IPv4 addresses but it introduces new security challenges due to its new features and protocols.
- The presentation will cover reconnaissance techniques enabled by IPv6's large address space, vulnerabilities in address autoconfiguration and neighbor discovery, and countermeasures using Mikrotik RouterOS firewall rules.
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http://cs.co/CSCRu
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6. Allow the ISP to telnet to the R2 host using port 2487.
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This document outlines tasks for configuring access lists on routers R1-R6. The tasks include: 1) configuring EIGRP routing, 2) configuring PAT on R1 and R2, 3) restricting Telnet/SSH access between routers, 4) preventing certain routes and pings from being sent between routers, and 5) restricting a router's commands when accessing another router via Telnet.
Nxll14 cut through-proxy on asa
This document provides instructions for configuring cut-through proxy on an ASA firewall. It includes steps to configure interfaces, ACLs, AAA authentication with an ISE server, a virtual Telnet IP, and verification tests. The goal is to allow a client to Telnet to a virtual IP on the ASA that will authenticate with ISE and cut through to permit access to a real host IP if authentication succeeds.
Eincop Netwax Lab: Vlan and Trunking ii
This document describes the configuration of a network topology with VLANs, trunking, routing, and NAT. The key tasks are:
1. Configure switches and routing with VLANs, VTP, EIGRP, and trunking to separate traffic from different client groups.
2. Perform PAT on routers R1 and R2 to allow clients to access the internet.
3. Configure a web server for clients to access via its IP address or domain name.
Nxll28 ospf iii
1. The document describes tasks for configuring OSPF routing on a network topology.
2. Key configurations include enabling OSPF on each router, configuring authentication for Area 1, summarizing loopback routes on R4, and preventing Area 3 routers from receiving routes from other areas.
3. PAT is configured on routers R1 and R11 to allow traffic from multiple private networks to use a single public IP address.
Radius vs. Tacacs+
RADIUS uses UDP for authentication and authorization, encrypting only the password field, while TACACS+ uses TCP and encrypts the entire payload. TACACS+ separates authentication, authorization, and accounting functions, allowing for different authentication mechanisms to be used, while RADIUS combines these steps. TACACS+ supports additional network protocols and provides more granular control over authorized commands.
Nxll12 zone based firewall
The document describes tasks for configuring a zone-based firewall on Router 1:
1. Create an inside and outside zone on Router 1's interfaces; apply an inspect policy between the zones to allow necessary traffic.
2. Configure R2 to ping R3 by name by adding DNS and host entries.
3. Configure R2 to copy a file from R4's HTTP server using the file path and name.
4. Configure R2 as the NTP server and have the other routers synchronize to it after applying necessary firewall policies.
Introduction of Networking
A network consists of a collection of computers, printers and other compatible equipment/ hardware
that is connected together so that they can communicate with each other.
Eincop Netwax Lab: EIGRP iii
1. The document describes configuring EIGRP routing on a network topology. This includes configuring EIGRP routing processes and interfaces, modifying timers, enabling authentication, adjusting metrics, ensuring all routes are learned, implementing route summarization, and filtering routes.
2. Key tasks are configuring EIGRP routing processes on each router with associated networks, changing timers on EIGRP process 200, enabling MD5 authentication between R4 and R5, adjusting metrics for EIGRP 100, redistributing between EIGRP processes, and summarizing loopback routes on R5 and R7.
3. The solution provides the configuration commands needed to complete each task, such as enabling EIGRP routing on
IP Address
IP Address is a unique identification given to Host, network device, server for data communication. IP
Address stand for Internet Protocol address, it is an addressing scheme used to identify a system on a
network. It is a unique address that certain electronic devices currently use to communicate with each
other on a network using internet protocol.
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Vpn
A VPN allows users to securely access a private network over a public network like the internet. It uses authentication, encryption, and tunneling protocols to protect data confidentiality and integrity. VPNs enable remote access for employees and connectivity between branch offices. Common VPN protocols include PPTP, L2TP, and IPSec which use encryption methods to secure data transmission over the VPN tunnel. VPNs provide benefits like reduced costs, flexibility, and scalability compared to private networks.
V P N
The document summarizes virtual private networks (VPNs), including their definition, need, and how they work. VPNs allow corporate networks to securely transmit data over the public internet. They provide flexibility, scalability, and cost savings compared to traditional private networks. The document describes various VPN types and protocols like IPsec and PPTP. It also discusses VPN hardware and software requirements and advantages/disadvantages of VPNs.
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Virtual Private Network (VPN).
Virtual private networks (VPNs) allow users to securely access a private network over a public network like the Internet. VPNs use tunneling, encryption, and authentication to provide security. Common VPN protocols include PPTP, L2TP, and IPsec. VPNs allow remote access for users and can connect multiple office sites through site-to-site VPNs. VPNs provide benefits like security, reliability, cost savings, and ability to connect globally but can have lower bandwidth and inconsistent performance compared to dedicated connections.
5691 computer network career
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csevpnppt-170905123948 (1).pdf
This document provides an overview of virtual private networks (VPNs). It defines a VPN as a private network that uses public telecommunication networks like the Internet instead of leased lines. It discusses the main types of VPNs including remote access, site-to-site intranet, and site-to-site extranet. The document also covers VPN protocols, security features, devices, advantages like reduced costs, and disadvantages like reliance on internet connectivity. It concludes that VPNs provide a secure and cost-effective private networking solution for many companies.
VIRTUAL PRIVATE NETWORKS BY SAIKIRAN PANJALA
Virtual private networks (VPNs) allow for secure data transmission over public networks like the Internet. VPNs create virtual tunnels between devices to securely transmit encrypted data. There are three main types of VPNs: remote-access VPNs for remote users, intranet-based site-to-site VPNs to connect locations within a company, and extranet-based site-to-site VPNs to connect companies. VPNs use protocols like IPsec and SSL to encrypt data and tunneling protocols to transmit data securely between devices.
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Virtual private networks (VPNs) use public telecommunication networks like the Internet to provide secure connections between remote locations. VPNs encrypt data packets and transmit them through tunnels, encapsulating one protocol within another, to maintain private networks virtually. This allows remote access and site-to-site connectivity while reducing costs compared to traditional private networks using leased lines.
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The document provides instructions for a lab on route redistribution between OSPF, EIGRP and RIP routing protocols. It involves configuring the routing protocols on various routers as specified in the topology, including redistributing routes between protocols. It also requires summarizing loopback routes between areas and protocols.
Nxll10 v lan and trunking
The document describes the tasks and solution for a lab on VLANs and trunking. The tasks are to: 1) Configure IP addresses as shown in the topology, 2) Create DHCP servers for VLANs 10 and 20, 3) Configure SW1 as the VTP server and the others as clients with the domain "netwaxlab.com", 4) Ensure PCs get IP addresses via DHCP, and 5) Allow communication between PCs 9 and 10 which have different IPs on the same VLAN. The solution describes the configurations needed on the switches to accomplish these tasks.
Nxll20 na ting
The document describes tasks to configure NAT on routers R1 and R2. This includes dynamically NATing internal networks and loopbacks to external IP ranges, PAT for some internal networks, and static NAT for R7's loopbacks. EIGRP is configured internally with redistribution. Access-lists are used to define the NAT source addresses and pools are used to map them to external IP ranges. Connectivity to external sites is tested with ping.
Nxll18 vpn (s2 s gre & dmvpn)
1. The document describes configuring IP addresses, DNS, a site-to-site GRE VPN between routers R5 and R6, and a DMVPN network between routers R1, R2, and R3.
2. For the GRE VPN, ISAKMP and IPsec are configured on R5 and R6 using a preshared key of "netwaxlab" to secure the GRE tunnel.
3. For the DMVPN, R1 is configured as a hub router and R2 and R3 as spoke routers. ISAKMP and IPsec are configured using a preshared key of "netwaxlab" to secure the GRE tunnels between the routers.
Nxll22 role based cli
1. The document describes tasks for configuring a role-based CLI, including configuring IP addresses, routing protocols, VPN tunnels, and access privileges for different devices.
2. It provides configuration steps for R2 and R3 to enable PAT for inside networks and configure a site-to-site VPN between them with IPsec.
3. PC5 is given full access to R13 but can only use show commands on R14, while PC4 is limited to the show history command on R11.
Nxll25 hsrp with failover
1. The document describes configuring high availability routing between two firewalls (ASA1 and ASA2) using failover, and between two routers (MLS3 and R2) using HSRP.
2. It provides configuration examples for failover on the ASAs, HSRP on MLS3 and R2, PAT on the ASA and R2, and EIGRP routing between the ASA and MLS3.
3. It also specifies default gateways for different PCs to reach R1 via the active HSRP router.
Nxll23 i pv6
The document provides instructions for configuring IPv6 on a network topology. It includes tasks to configure IPv6 addresses on routers, configure Frame-Relay over IPv6, assign IPv6 addresses to routers through autoconfiguration, and configure OSPF routing between the routers.
Nxll24 i pv6
The document provides the configuration steps to complete an IPv6 lab topology including:
1. Configure routing protocols EIGRP, OSPF, and RIP on each router as specified in the topology.
2. Enable tunneling between IPv6 and IPv4 interfaces to allow communication across the different address families.
3. Configure specific routing protocols over the tunnels, including EIGRP 111 between R4 and R5 and RIP between R2 and R6.
4. Redistribute routes between protocols to ensure all routers receive routes from each other protocol.
Eincop Netwax Lab: Site 2 Site VPN with Routing Protocols
This document provides instructions for configuring routing protocols and a site-to-site VPN between HQ and BR1 networks. The tasks include: 1) configuring EIGRP and RIP routing with redistribution to ensure HQ_R2 learns all routes, 2) enabling MD5 authentication on EIGRP 200, 3) establishing an IPsec VPN between HQ and BR1 to permit access only to BR1 loopback addresses from HQ_R2, and 4) summarizing the BR1 loopback routes into OSPF area 0 on BR1.
Kerberos Protocol
Kerberos is a computer network authentication protocol which works on the basis of 'tickets' to allow
nodes communicating over a non-secure network to prove their identity to one another in a secure
manner. Its designers aimed it primarily at a client–server model and it provides mutual
authentication—both the user and the server verify each other's identity. Kerberos protocol messages
are protected against eavesdropping and replay attacks.
TACACS Protocol
Terminal Access Controller Access-Control System (TACACS, usually pronounced like tack-axe) refers to a
family of related protocols handling remote authentication and related services for networked access
control through a centralized server. The original TACACS protocol, which dates back to 1984, was used
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Radius Protocol
RADIUS is a protocol for carrying information related to authentication, authorization, and configuration
between a Network Access Server that desires to authenticate its links and a shared Authentication
Server.
RADIUS stands for Remote Authentication Dial In User Service.
RADIUS is an AAA protocol for applications such as Network Access or IP Mobility
It works in both situations, Local and Mobile.
It uses Password Authentication Protocol (PAP), Challenge Handshake Authentication Protocol
(CHAP), or Extensible Authentication Protocol (EAP) protocols to authenticate users.
It look in text file, LDAP Servers, Database for authentication.
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Remote VPN
- 1. Remote VPN Remote-access VPNs allow secure access to corporate resources by establishing an encrypted tunnel across the Internet. The ubiquity of the Internet, combined with today's VPN technologies, allows organizations to cost-effectively and securely extend the reach of their networks to anyone, anyplace, anytime. VPNs have become the logical solution for remote-access connectivity for the following reasons: Provides secure communications with access rights tailored to individual users, such as employees, contractors, or partners. Enhances productivity by extending corporate network and applications. Reduces communications costs and increases flexibility. Example Remote VPN (Note: R1 able to reach R3.) Figure 1 Topology
- 2. Remote VPN R3 (Server) crypto isakmp policy 1 authentication pre-share encryption 3des group 2 hash sha lifetime 1800 exit crypto ipsec transform-set tset esp-sha-hmac esp-3des exit ip local pool pool1 192.168.100.1 192.168.100.254 crypto isakmp client configuration group Test key cisco domain cisco.com save-password pool pool1 exit crypto dynamic-map DMAP 10 set transform-set tset reverse-route exit crypto map CMAP 10 ipsec-isakmp dynamic DMAP crypto map CMAP isakmp authorization list default crypto map CMAP client authentication list defualt aaa new-model aaa authentication login default local aaa authorization network default local username cisco password cisco int f0/0 crypto map CMAP exit
- 3. Remote VPN R1 (Client) crypto ipsec client ezvpn EZvpn mode client connect auto peer 102.1.1.100 group Test key cisco username cisco password cisco int f0/0 crypto ipsec client ezvpn Ezvpn outside exit int f0/1 crypto ipsec client ezvpn Ezvpn inside exit