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Hello Experts, 
 
I have ACL's on a few internal VLAN's and folks are beginning to require the use of Webex. The website says this: 
 
WebEx services are offered over the following IP ranges: 
 
66.163.32.0 - 66.163.63.255 
209.197.192.0 - 209.197.223.255 
173.243.12.0 - 173.243.12.255 (Subnet) 
 
<a href="http://www.webex.com/webexconnect/orgadmin/help/index.htm?toc.htm?17161.htm" rel="ugc">http://www.webex.com/webexconnect/orgadmin/help/index.htm?toc.htm?17161.htm</a> 
 
Can I use an IP-range command or do I need to list each of these networks individually? 
 
Or for example, just opening a full class B? Would you recommend against this? I can still be more granular on the edge firewall as the ACL's are more flexible. (Also I know the website says it is generally not recommended but it seems they don't change IP's very often.) 
 
66.163.x.x 
209.197.x.x 
 
Also, do I specify the command with the mask or the wild card? For example 255.255.0.0 or 0.0.255.255? 
 
Thanks Experts!
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Hello Experts,

I have ACL's on a few internal VLAN's and folks are beginning to require the use of Webex. The website says this:

WebEx services are offered over the following IP ranges:

66.163.32.0 - 66.163.63.255
209.197.192.0 - 209.197.223.255
173.243.12.0 - 173.243.12.255 (Subnet)

http://www.webex.com/webexconnect/orgadmin/help/index.htm?toc.htm?17161.htm

Can I use an IP-range command or do I need to list each of these networks individually?

Or for example, just opening a full class B? Would you recommend against this? I can still be more granular on the edge firewall as the ACL's are more flexible. (Also I know the website says it is generally not recommended but it seems they don't change IP's very often.)

66.163.x.x
209.197.x.x

Also, do I specify the command with the mask or the wild card? For example 255.255.0.0 or 0.0.255.255?

Thanks Experts!

ACL on Cisco 3560

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

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).