I need to secure my routers by only allowing certain hosts on my internal network to access. I use SSH. I have tried using acl's but connection is refused when I set line vty 0 4 to use the access-class # in command.
Can someone be so kind to show me the errors I am making? These are all external facing routers with external IP's. I am NAT'd behind a firewall.
! interface FastEthernet0/0 ip address myexternalipaddress 255.255.255.248 no ip redirects no ip unreachables duplex auto speed auto no cdp enable ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 no ip address no ip redirects no ip unreachables no ip proxy-arp encapsulation frame-relay IETF no ip mroute-cache no fair-queue frame-relay lmi-type ansi ! interface Serial0/0/0.1 point-to-point ip unnumbered FastEthernet0/0 no arp frame-relay frame-relay interface-dlci 500 ! ip classless ip route 0.0.0.0 0.0.0.0 Serial0/0/0.1 !
line vty 0 4 session-timeout 30 login local access-class 101 in transport input ssh transport output none
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