i have no idea what that means. Can you tell me how to edit my currecnt config to allow this?
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Cisco 1720 Dual eth WIC
I have a cisco 1720 router, with an eth WIC in it. Currently I have it acting as a basic router for my network. I would like to add another eth WIC and have a setup where the network on the new WIC is completely open (DMZed). But also if possible I would like to have both networks to still be able to talk to each other. Is this possible? If so how would I go about modifying my config:
Building configuration...
Current configuration : 2453 bytes
!
version 12.3
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname EsportsproCisco
!
boot-start-marker
boot-end-marker
!
enable secret
!
memory-size iomem 25
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
no ip dhcp conflict logging
ip dhcp excluded-address 10.10.0.1 10.10.0.20
!
ip dhcp pool EsportsDHCP
network 10.10.0.0 255.255.255.0
domain-name 1720.cisco
default-router 10.10.0.1
netbios-node-type h-node
dns-server 207.69.188.185 207.69.188.186
!
ip cef
!
!
!
!
interface Ethernet0
ip address dhcp
ip access-group 101 in
ip nat outside
half-duplex
!
interface FastEthernet0
ip address 10.10.0.1 255.255.255.0
ip broadcast-address 10.10.0.255
ip nat inside
speed auto
!
ip nat inside source list 1 interface Ethernet0 overload
ip nat inside source static tcp 10.10.0.60 6112 interface Ethernet0 6112
ip nat inside source static tcp 10.10.0.60 3724 interface Ethernet0 3724
ip nat inside source static udp 10.10.0.60 3389 interface Ethernet0 3389
ip nat inside source static tcp 10.10.0.60 6881 interface Ethernet0 6881
ip nat inside source static tcp 10.10.0.60 6882 interface Ethernet0 6882
ip nat inside source static tcp 10.10.0.60 6883 interface Ethernet0 6883
ip nat inside source static tcp 10.10.0.60 6884 interface Ethernet0 6884
ip nat inside source static tcp 10.10.0.60 6885 interface Ethernet0 6885
ip nat inside source static tcp 10.10.0.60 6886 interface Ethernet0 6886
ip nat inside source static tcp 10.10.0.60 6887 interface Ethernet0 6887
ip nat inside source static tcp 10.10.0.60 6888 interface Ethernet0 6888
ip nat inside source static tcp 10.10.0.60 6889 interface Ethernet0 6889
ip nat inside source static tcp 10.10.0.60 3389 interface Ethernet0 3389
ip classless
ip route 0.0.0.0 0.0.0.0 69.22.93.1
ip http server
!
access-list 1 permit 10.10.0.0 0.0.0.255
access-list 101 deny tcp any any eq telnet
access-list 101 permit ip any any
access-list 111 permit icmp host 10.10.1.0 any
access-list 111 deny ip any any
snmp-server community public RO
snmp-server community priv RW
snmp-server contact pablo
snmp-server enable traps tty
banner motd ^CCCCCCisco 1720^C
!
line con 0
exec-timeout 0 0
password
login
speed 19200
line aux 0
line vty 0 4
access-class 1 in
password
login
!
end
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Answers
Well, as your config is right now you are using ACL 101 on the Ethernet0 interface. But the only thing this access-list is blocking is telnet. It's open for everything else. You also have ACL 111 in there but it is not applied anywhere.
From looking at your static PAT translations you want to open up for Remote Desktop and Bit Torrent. If that's the case then I would just open up for those applications.
So let's assume you have a new interface, Ethernet1, your configuration could look something like this.
!
interface Ethernet0
description Internet interface
ip address dhcp
ip nat outside
half-duplex
!
interface Ethernet1
description DMZ interface
ip address 10.10.1.1 255.255.255.0
ip nat inside
!
interface FastEthernet0
description Inside interface
ip address 10.10.0.1 255.255.255.0
ip access-group 101 out
ip broadcast-address 10.10.0.255
ip nat inside
speed auto
!
p nat inside source list 1 interface Ethernet0 overload
ip nat inside source static tcp 10.10.0.60 6112 interface Ethernet0 6112
ip nat inside source static tcp 10.10.0.60 3724 interface Ethernet0 3724
ip nat inside source static tcp 10.10.0.60 6881 interface Ethernet0 6881
ip nat inside source static tcp 10.10.0.60 6882 interface Ethernet0 6882
ip nat inside source static tcp 10.10.0.60 6883 interface Ethernet0 6883
ip nat inside source static tcp 10.10.0.60 6884 interface Ethernet0 6884
ip nat inside source static tcp 10.10.0.60 6885 interface Ethernet0 6885
ip nat inside source static tcp 10.10.0.60 6886 interface Ethernet0 6886
ip nat inside source static tcp 10.10.0.60 6887 interface Ethernet0 6887
ip nat inside source static tcp 10.10.0.60 6888 interface Ethernet0 6888
ip nat inside source static tcp 10.10.0.60 6889 interface Ethernet0 6889
ip nat inside source static tcp 10.10.0.60 3389 interface Ethernet0 3389
ip classless
ip route 0.0.0.0 0.0.0.0 69.22.93.1
ip http server
!
access-list 1 permit 10.10.0.0 0.0.1.255
access-list 101 deny tcp any any eq telnet
acccess-list 101 remark Below is the line permitting the DMZ subnet to access the Inside subnet
access-list 101 permit ip 10.10.1.1 0.0.0.255 10.10.0.0 0.0.0.255
access-list 101 permit tcp any any eq 3389
access-list 101 permit tcp any any eq 3724
access-list 101 permit tcp any any eq 6112
access-list 101 permit tcp any any eq 6881 6889
access-list 101 deny ip any any
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by: photograffitiPosted on 2005-07-09 at 23:24:45ID: 14405950
First of all, DMZ should not mean completely open. I put stuff in my DMZ that is in anyway accessible from the Internet but I still lock it down to only the necessities. For my inside network, I only allow access to that network from specific devices on the DMZ - like an OWA server hitting my Exchange server.
As for your situation, if you truly want your DMZ open then just modify your WAN interface ACL to allow anything to the DMZ subnet but only certain ports open to the inside subnet. If there is no ACL on the DMZ interface or the Inside interface then by default they will have wide open access to each other.