VPN 3 (Virtual private network)

VPN 2 (Virtual private network)

VPN 1 (Virtual private network)

ospf basic 2

ospf Router id

Dynamic nat configuration

Types of nat

Nat basic

Extended access list

Standard ACL(host Blocking)

In this example i m trying to block 30.0.0.1 host from my network which is HCL(10.0.0.0)

HCL(config)#ip access-list standard hcl
HCL(config-std-nacl)#deny host 30.0.0.1
HCL(config-std-nacl)#permit any
HCL(config)#interface fastEthernet 0/0
HCL(config-if)#ip access-group hcl out

........................OR................................

HCL(config)#ip access-list standard 10
HCL(config-std-nacl)#deny host 30.0.0.1
HCL(config-std-nacl)#permit any
HCL(config-std-nacl)#exit
HCL(config)#interface fastEthernet 0/0
HCL(config-if)#ip access-group 10 out

........................OR................................

HCL(config)#access-list 10 deny host 30.0.0.1
HCL(config)#access-list 10 permit any
HCL(config)#interface fastEthernet 0/0
HCL(config-if)#ip access-group 10 out

Standard ACL

In this example i m trying  to block 30.0.0.0 network for my network which is HCL(10.0.0.0)

HCL(config)#ip access-list standard HCL
HCL(config-std-nacl)#deny 30.0.0.0 0.255.255.255
HCL(config-std-nacl)#permit any
HCL(config-std-nacl)#exit
HCL(config)#interface fastEthernet 0/0
HCL(config-if)#ip access-group HCL out

........................OR................................
HCL(config)#ip access-list standard 10
HCL(config-std-nacl)#deny 30.0.0.0 0.255.255.255
HCL(config-std-nacl)#permit any
HCL(config-std-nacl)#exit
HCL(config)#interface fastEthernet 0/0
HCL(config-if)#ip access-group 10 out

........................OR................................

HCL(config)#access-list 10 deny 30.0.0.0 0.255.255.255
HCL(config)#access-list 10 permit any
HCL(config)#interface fastEthernet 0/0
HCL(config-if)#ip access-group 10 out

link for internet download manager

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Extended ACL (network to Host blocking)

Extended ACL for network to Host blocking

HCL(config)#ip access-list extended hcl
HCL(config-ext-nacl)#deny icmp 30.0.0.0 0.255.255.255 host 10.0.0.1
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group hcl out
........................................OR.................................................

HCL(config)#ip access-list extended 110
HCL(config-ext-nacl)#deny icmp 30.0.0.0 0.255.255.255 host 10.0.0.1
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group 110 out
........................................OR.................................................

HCL(config)#access-list 110 deny icmp 30.0.0.0 0.255.255.255 host 10.0.0.1
HCL(config)#access-list 110 permit ip any any
HCL(config)#inter fa 0/0
HCL(config-if)#ip access-group 110 out

Extended ACL (Host to Host blocking)

Extended ACL for Host to Host blocking

HCL(config)#ip access-list extended hcl
HCL(config-ext-nacl)#deny icmp host 30.0.0.1 host 10.0.0.1
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group hcl out
........................................OR.................................................

HCL(config)#ip access-list extended 110
HCL(config-ext-nacl)#deny icmp host 30.0.0.1 host 10.0.0.1
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group 110 out
........................................OR.................................................

HCL(config)#access-list 110 deny icmp host 30.0.0.1 host 10.0.0.1
HCL(config)#access-list 110 permit ip any any
HCL(config)#inter fa 0/0
HCL(config-if)#ip access-group 110 out

Extended ACL (Host to Network blocking)

Extended ACL for Host to Network blocking

HCL(config)#ip access-list extended hcl
HCL(config-ext-nacl)#deny icmp host 30.0.0.1 10.0.0.0 0.255.255.255
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group hcl out
.......................................OR...........................................

HCL(config)#ip access-list extended 110
HCL(config-ext-nacl)#deny icmp host 30.0.0.1 10.0.0.0 0.255.255.255
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group 110 out
.......................................OR...........................................

HCL(config)#access-list 110 deny icmp host 30.0.0.1 10.0.0.0 0.255.255.255
HCL(config)#access-list 110 permit ip any any
HCL(config)#inter fa 0/0
HCL(config-if)#ip access-group 110 out

Extended Access list(network to network blocking)

Extended Access list(network to network blocking)
HCL(config)#ip access-list extended hcl
HCL(config-ext-nacl)#deny icmp 30.0.0.0 0.255.255.255 10.0.0.0 0.255.255.255
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group hcl out
..........................................OR............................................

HCL(config)#ip access-list extended 110
HCL(config-ext-nacl)#deny icmp 30.0.0.0 0.255.255.255 10.0.0.0 0.255.255.255
HCL(config-ext-nacl)#permit ip any any
HCL(config-ext-nacl)#inter fa 0/0
HCL(config-if)#ip access-group 110 out
..........................................OR............................................

HCL(config)#access-list 110 deny icmp 30.0.0.0 0.255.255.255 10.0.0.0 0.255.255.255
HCL(config)#access-list 110 permit ip any any
HCL(config)#inter fa 0/0
HCL(config-if)#ip access-group 110 out

static routing with subnetting

Standard Access control list commands

Standard Access control list

IBM(config)#ip access-list standard hcl
IBM(config-std-nacl)#deny 30.0.0.0 0.255.255.255
IBM(config-std-nacl)#permit any
IBM(config)#inter fastEthernet 0/0
IBM(config-if)#ip access-group hcl out
.....................OR...........................
IBM(config)#ip access-list standard 10
IBM(config-std-nacl)#deny 30.0.0.0 0.255.255.255
IBM(config-std-nacl)#permit any
IBM(config)#inter fastEthernet 0/0
IBM(config-if)#ip access-group 10 out
.....................OR...........................
IBM(config)#access-list 10 deny 30.0.0.0 0.255.255.25
IBM(config)#access-list 10 permit any
IBM(config)#inter fastEthernet 0/0
IBM(config-if)#ip access-group 10 out



Block a host through standard ACL

hcl(config)#ip access-list standard hcl
hcl(config-std-nacl)#deny host 30.0.0.1
hcl(config-std-nacl)#permit any
hcl(config)#inter fastEthernet 0/0
hcl(config-if)#ip access-group hcl out
.....................OR...........................
hcl(config)#ip access-list standard 10
hcl(config-std-nacl)#deny host 30.0.0.1 
hcl(config-std-nacl)#permit any
hcl(config)#inter fastEthernet 0/0
hcl(config-if)#ip access-group 10 out
.....................OR...........................
hcl(config)#ACcess-list 10 deny host 30.0.0.1
hcl(config)#access-list 10 permit any
hcl(config)#inter fastEthernet 0/0
hcl(config-if)#ip access-group 10 out

standard ACL cisco

ACL list for host