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To start, we need to confirm the firewall is in routed mode, this is on by default, but still worth checking. We need to allow HTTP and HTTPS from the DMZ web server to the Internet, but the DMZ database server must be protected. Our test network is setup as follows:Ī Cisco ASA with four interfaces in use, one connected to the Internet, one connected to a LAN switch, one connected to a DMZ web server, and one with a DMZ database server. We will focus on port forwarding on a Cisco ASA configured in routed mode, using a Bridged Virtual Interface (BVI), using Cisco’s ASDM GUI administration tool. Sometimes these services are on dedicated IP addresses, other times the addresses are shared and mostly using some type of Network Address Translation (NAT). The ability to provide a service to the Internet requires being able to forward ports from one interface of a firewall to another interface. Ok, i now have the asa on my home network with a bridged cable modem, and this is my current config: I havn't changed passwords yet, just getting the config working and then I'll setup and secure it Policy-map type inspect dns preset_dns_map Same-security-traffic permit intra-interfaceĭhcpd auto_config outside interface inside Here is the new configuration with PPPOE enabled for outside network: Since you have your global assigned to 1 (global (outside) 1 interface ) and no global assigned to 10, these nat commands will essentially prevent any traffic on the inside from getting natted to the internet.
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You also have an issue with your NAT commands
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Basically, it will let the ASA get the Public WAN ip address of your connection. Many DSL modems will let you put into a 'bridged' mode (some manufacturers have different terms for it. I'd highly recommend reconfiguring your DSL modem to get rid of both of these problems If the modem is setup to give an address on the 192.168.1.0 255.255.255.0 network, it is also performing NAT. The networks overlap and you're going to get some funky behavior, if you can even get it working at all This is the first ASA I've configured and I've been out of IT for awhile so feels like I'm learning this all over again so any help would be greatly appreciatedįirst, you are going to have problems if you are trying to use 192.168.1.1 255.255.0.0 on the inside and a network of 192.168.1.0 255.255.255.0 with a gateway of 192.168.1.1 on the outside Success rate is 100 percent (5/5), round-trip min/avg/max = 40/70/180 msīut when trying to ping, I get: Sending 5, 100-byte ICMP Echos to 4.2.2.2, timeout is 2 seconds: I can ping 4.2.2.2 (suggested on another site): I am using 192.168.1.1 255.255.255.0 for the outside network as that is what the DSL is setup to provide, and using 192.168.1.1 255.255.0.0 for the inside to prevent overlap.
ENABLE TELNET CISCO ASA 5505 ASDM HOW TO
I've been trying a few different suggestions so I'm sure i have more NAT rules than I need, however I'm not sure how to delete the entries. I am trying to configure the outside network to pull an ip from the DSL modem/router and then have the inside network provide ip's to everything on the switch, so I think my problem is with No threat-detection statistics tcp-interceptĬryptochecksum:279af332cc5048fd65679a8b3d8f21b1 Snmp-server enable traps snmp authentication linkup linkdown coldstartĬrypto ipsec security-association lifetime seconds 28800Ĭrypto ipsec security-association lifetime kilobytes 4608000ĭhcpd address 192.168.1.5-192.168.1.132 inside Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absoluteĭynamic-access-policy-record DfltAccessPolicy Icmp unreachable rate-limit 1 burst-size 1
ENABLE TELNET CISCO ASA 5505 ASDM PASSWORD
I'm attempting to place the ASA between the modem and the switch and have everything running through the ASA.Įnable password 8Ry2YjIyt7RRXU24 encrypted DHCP only enabled on the DSL modem/router. Current infrastructure: DSL modem/router from ISP connected to Cisco switch with another switch and wireless access point added. I'm trying to integrate into the existing network and am now stuck at trying to access the web through the ASA. I recently purchased the 5505 for a very small company I work for (20 workstations total) and I'm attempting to configure the ASA for them.