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Hi there,<br />
I have a Cisco ASA 5520 firewall, where ethernet0/1 is connected to a cisco catalyst 2960 switch.<br />
I also have a Cisco 3670 router, connected to the same switch. The Cisco router terminates several frame relay connections.<br />
<br />
Randomly, I see entries such as this on my cisco router when I issue the sh arp command:<br />
<br />
Internet &nbsp;192.168.112.1 &nbsp; &nbsp; &nbsp; &nbsp;17 &nbsp; 0f3b.d8bd.4162 &nbsp;ARPA &nbsp; Vlan2<br />
<br />
The Vlan2 interface on my router is the one connected to the catalyst switch, and the MAC address above belongs to the ethernet0/1 interface on my ASA, so for some reason, although 192.168.112.0 is a frame network connected to an interface on my router, the switch somehow advertises that network to be reachable through my ASA.<br />
<br />
I cannot use this guide since my switch OS does not support the vlan access-map command. What would you suggest me to do?<br />
<br />
<br />
<a href="http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_example09186a0080470c39.shtml" rel="ugc">http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_example09186a0080470c39.shtml</a><br />

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Hi there,
I have a Cisco ASA 5520 firewall, where ethernet0/1 is connected to a cisco catalyst 2960 switch.
I also have a Cisco 3670 router, connected to the same switch. The Cisco router terminates several frame relay connections.

Randomly, I see entries such as this on my cisco router when I issue the sh arp command:

Internet  192.168.112.1        17   0f3b.d8bd.4162  ARPA   Vlan2

The Vlan2 interface on my router is the one connected to the catalyst switch, and the MAC address above belongs to the ethernet0/1 interface on my ASA, so for some reason, although 192.168.112.0 is a frame network connected to an interface on my router, the switch somehow advertises that network to be reachable through my ASA.

I cannot use this guide since my switch OS does not support the vlan access-map command. What would you suggest me to do?


http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_example09186a0080470c39.shtml


Strange MAC address spoofing problem

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

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Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.

Software Firewalls

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.