{"id":1462,"date":"2013-05-20T07:36:27","date_gmt":"2013-05-20T06:36:27","guid":{"rendered":"http:\/\/blog.spanger.org\/?p=1462"},"modified":"2013-05-20T07:36:27","modified_gmt":"2013-05-20T06:36:27","slug":"cisco-1841-hwic-4esw-nat","status":"publish","type":"post","link":"https:\/\/blog.spanger.org\/?p=1462","title":{"rendered":"Cisco 1841 + HWIC-4ESW + NAT"},"content":{"rendered":"

Cisco 1841 ethernet port + dialer interface<\/strong><\/p>\n

interface FastEthernet0\/0<\/strong>
\ndescription == WAN interface
\nno ip address
\nduplex auto
\nspeed auto
\npppoe enable group global
\npppoe-client dial-pool-number 1
\nno cdp enable
\n!
\ninterface FastEthernet0\/1<\/strong>
\ndescription == LAN interface
\nip address 192.168.1.1 255.255.255.0
\nip nat inside
\nip virtual-reassembly in
\nip tcp adjust-mss 1452
\nduplex auto
\nspeed auto
\n!<\/p>\n

interface Dialer1<\/strong>
\ndescription == pppoe to ISP
\nip address negotiated
\nip mask-reply
\nip directed-broadcast
\nip mtu 1492
\nip nat outside
\nip virtual-reassembly in
\nencapsulation ppp
\ndialer pool 1
\ndialer-group 1
\nppp authentication chap pap callin
\nppp chap hostname username@domain.tld
\nppp chap password 7 060B162A5D4C222C1F
\nppp pap sent-username username@domain.tld password 7 030E3100150D592954
\nppp ipcp dns request
\nppp ipcp route default
\nppp ipcp address accept
\nno cdp enable
\n!<\/p>\n

DHCP POOL<\/strong><\/p>\n

ip dhcp pool LAN
\nnetwork 192.168.2.0 255.255.255.0
\ndefault-router 192.168.1.1
\ndns-server 8.8.8.8 4.4.4.4
\ndomain-name your-domain.tld<\/p>\n

VLAN configuration<\/strong><\/p>\n

interface Vlan2
\ndescription == LAN
\nip address 192.168.2.1 255.255.255.0
\nip helper-address 192.168.1.1
\nip nat inside <— important part in NAT translation
\nip virtual-reassembly in<\/p>\n

HWIC-4ESW ethernet port configuration<\/strong><\/p>\n

interface FastEthernet0\/0\/0
\ndescription == PC LAN
\nswitchport access vlan 2
\nno ip address
\n!
\ninterface FastEthernet0\/0\/1
\ndescription == AP LAN
\nswitchport access vlan 2
\nno ip address
\n!<\/p>\n

NAT<\/strong><\/p>\n

ip nat inside source list 1 interface Dialer1 overload<\/p>\n

NAT ACL<\/strong><\/p>\n

access-list 1 permit 192.168.1.0 0.0.0.255
\naccess-list 1 permit 192.168.2.0 0.0.0.255<\/p>\n","protected":false},"excerpt":{"rendered":"

Cisco 1841 ethernet port + dialer interface interface FastEthernet0\/0 description == WAN interface no ip address duplex auto speed auto pppoe enable group global pppoe-client dial-pool-number 1 no cdp enable ! interface FastEthernet0\/1 description == LAN interface ip address 192.168.1.1 255.255.255.0 ip nat inside ip virtual-reassembly in ip tcp adjust-mss 1452 duplex auto speed auto […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[135,137,136],"class_list":["post-1462","post","type-post","status-publish","format-standard","hentry","category-cisco","tag-cisco-1841","tag-hwic-4esw","tag-nat"],"_links":{"self":[{"href":"https:\/\/blog.spanger.org\/index.php?rest_route=\/wp\/v2\/posts\/1462","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.spanger.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.spanger.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.spanger.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.spanger.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1462"}],"version-history":[{"count":3,"href":"https:\/\/blog.spanger.org\/index.php?rest_route=\/wp\/v2\/posts\/1462\/revisions"}],"predecessor-version":[{"id":1465,"href":"https:\/\/blog.spanger.org\/index.php?rest_route=\/wp\/v2\/posts\/1462\/revisions\/1465"}],"wp:attachment":[{"href":"https:\/\/blog.spanger.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1462"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.spanger.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1462"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.spanger.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}