No Forward Interface Command on the Cisco ASA 5. Base License. The ASA 5. Base License and Security Plus license. Same hardware, but the Security Plus license unlocks more features, such as the number of VLANs that can be configured. License Type and Mode. Maximum No. The first two VLANs can be configured to communicate with any of the other three VLANs. Cisco Security Appliance Command Line Configuration Guide. ASA 5505 Base License. The third VLAN, however, can only be configured to initiate traffic with one other VLAN. So a good use for this third subnet would be as a DMZ or a guest subnet. ASA 5. 50. 5 with 3 VLANs. Let’s start with an unconfigured ASA 5. Right out of the box, with a blank config. The only VLAN is VLAN1, and all the physical interfaces belong to it. ASA5505 base license supports 3 vlans: inside, outside, and dmz. Was not aware that ASA 5505 base license restricts number of. Cisco ASA 5505 :: Techniques for limiting consumed hosts. Cisco ASA Licensing Quick Reference Guide. 3 DMZ Restricted On the 5505 each interface is assigned a VLAN. Included with base license. I have a Cisco ASA 5505 router with a base license. Experts Exchange > Questions > Cisco ASA 5505 - Questions about upgrading to. VLAN1 and all the physical interfaces are administratively down. The show switch vlan command displays the VLANs and the physical ports assigned to each VLAN. The show interface ip brief command shows all physical and logical interfaces, their IP addresses, whether they are administratively up/down, and whether their line protocol is up/down. Method Status Protocol. Internal- Data. 0/0 unassigned YES unset up up. Internal- Data. 0/1 unassigned YES unset administratively down up. Loopback. 0 1. YES unset up up. Vlan. 1 unassigned YES unset down down. Ethernet. 0/0 unassigned YES unset administratively down up. Ethernet. 0/1 unassigned YES unset administratively down up. Ethernet. 0/2 unassigned YES unset administratively down down. Ethernet. 0/3 unassigned YES unset administratively down down. Ethernet. 0/4 unassigned YES unset administratively down down. Ethernet. 0/5 unassigned YES unset administratively down down. Ethernet. 0/6 unassigned YES unset administratively down up. Ethernet. 0/7 unassigned YES unset administratively down up. I’ll set up the first two VLANs as “inside” and “outside” and give them IP addresses. This is because the ASA defines an active VLAN as a VLAN with a nameif command configured. So it will accept the IP address command, but not the nameif command on the third VLAN. Method Status Protocol. Internal- Data. 0/0 unassigned YES unset up up. Internal- Data. 0/1 unassigned YES unset administratively down up. Loopback. 0 1. YES unset up up. Vlan. 1 5. YES manual down down. Vlan. 2 1. YES manual down down. Vlan. 3 1. YES manual down down. Ethernet. 0/0 unassigned YES unset administratively down up. Ethernet. 0/1 unassigned YES unset administratively down up. Ethernet. 0/2 unassigned YES unset administratively down down. Ethernet. 0/3 unassigned YES unset administratively down down. Ethernet. 0/4 unassigned YES unset administratively down down. Ethernet. 0/5 unassigned YES unset administratively down down. Ethernet. 0/6 unassigned YES unset administratively down up. Ethernet. 0/7 unassigned YES unset administratively down up. All three VLANs are administratively up because I ran the no shut command when I configured them. However, their status is shown as down when I ran the show switch vlan command because they need to have at least one physical interface assigned to them, and that physical interface needs to be administratively up. You can see that all of the physical interfaces are administratively down. Four of the physical interfaces (E0/0, E0/1, E0/6 and E0/7) show their Line Protocol status as up. This is because those physical interfaces are connected to live devices on my network. So let’s assign the physical interfaces to the VLANs and bring them up. Ethernet 0/1 is already assigned to VLAN1, so all I have to do is run a no shut command. This brings Ethernet 0/1 up. Notice that VLAN1 also shows its status as up immediately. Method Status Protocol. Internal- Data. 0/0 unassigned YES unset up up. Internal- Data. 0/1 unassigned YES unset administratively down up. Loopback. 0 1. YES unset up up. Vlan. 1 5. YES manual up up. Vlan. 2 1. YES manual down down. Vlan. 3 1. YES manual down down. Ethernet. 0/0 unassigned YES unset administratively down up. Ethernet. 0/1 unassigned YES unset up up. Ethernet. 0/2 unassigned YES unset administratively down down. Ethernet. 0/3 unassigned YES unset administratively down down. Ethernet. 0/4 unassigned YES unset administratively down down. Ethernet. 0/5 unassigned YES unset administratively down down. Ethernet. 0/6 unassigned YES unset administratively down up. Ethernet. 0/7 unassigned YES unset administratively down up. For a VLAN to be up, it needs: An IP address and subnet mask. A name. A security level. To be administratively up. To have at least one physical interface assigned to it, and that physical interface must be up. I’ll assign some of the other physical interfaces to VLAN2 and VLAN3. Method Status Protocol. Internal- Data. 0/0 unassigned YES unset up up. Internal- Data. 0/1 unassigned YES unset administratively down up. Loopback. 0 1. YES unset up up. Vlan. 1 5. YES manual up up. Vlan. 2 1. YES manual up up. Vlan. 3 1. YES manual up up. Ethernet. 0/0 unassigned YES unset up up. Ethernet. 0/1 unassigned YES unset up up. Ethernet. 0/2 unassigned YES unset administratively down down. Ethernet. 0/3 unassigned YES unset administratively down down. Ethernet. 0/4 unassigned YES unset administratively down down. Ethernet. 0/5 unassigned YES unset administratively down down. Ethernet. 0/6 unassigned YES unset up up. Ethernet. 0/7 unassigned YES unset up up. So how does the no forward interface vlan command affect the flow of traffic? The inside interface can initiate traffic to the DMZ, and the return traffic is permitted. For example, a host on the inside network can access my web server in the DMZ. The inside host initiates the connection to my web server, and the ASA places the connection in its state table. When my web server replies with the web page, the ASA sees that this is not a new connection, just return traffic from an existing connection, and allows it to reach the inside host who had requested the web page. However, the DMZ cannot initiate traffic to the inside interface, even when an ACL is configured on the dmz interface, explicitly permitting traffic from the DMZ to the inside. That is because the no forward interface vlan command prevents any traffic originating from the DMZ from entering the inside network. So how is this different from the outside interface? After all, the outside interface has a security level of 0, and it cannot initiate traffic to the inside interface. However, since the outside interface does not have a no forward interface vlan command configured, an ACL on the outside interface is all you need to permit all traffic originating from the outside network to reach the inside network. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Cisco ASA 8. 4 and 8. Command Reference. Difference between an ASA5. Cisco. . The 5. 50. These licenses are the base and the security plus. Both offer 1. 50 megabits per second throughput, a maximum of 2. SSL VPN user sessions, and a maximum encrypted VPN throughput of 1. However, the security plus license has additional features. For example, it supports up to 2. It also supports a maximum of 2. VPN sessions and the base license supports a maximum of 1. It should be noted that both licenses initially only support two VPN connections( 2). The security plus license also allows for a maximum of 2. VLANs, with trunking enabled, and the base license supports a maximum of three. Unfortunately, neither of the licenses supports intrusion prevention, content security (which includes antivirus, anti spyware, and file blocking), or VPN clustering and load balancing. However, the base license does allow that particular VLAN to respond to requests. Another way of explaining this restriction is that there are two normal zones and one restricted zone that can only communicate with one of the other zones( 2). This can potentially create problems when trying to implement a demilitarized zone (also known as a DMZ) as will be discussed in a later section.
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