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New Member

Security considerations for Ethernet connection to ISP

My organizaton is getting an ethernet connection from the ISP to supply internet connectivity. Does anyone have any design or white papers from a security perspective to terminiate the ethernet connection internal. I seen where people bring it into a vlan off a 6500 switch or they bring it directly in to a PIX. Please let me know what you think. Thanks.

2 REPLIES

Re: Security considerations for Ethernet connection to ISP

Ideally put it straight into a firewall.

As an absolute last resort if this is not possible (for instance if the internet is presented as a VLAN on a trunk) then you will have to use a VLAN, but you must be very careful:

- don't use VLAN1

- use a "dummy" VLAN for native.

- prune that VLAN as much as possible so it only goes where needed.

- keep it as layer2 - don't create "interface vlan.." on MSFC etc

Check out the SAFE whitepapers at http://www.cisco.com/en/US/partner/netsol/ns340/ns394/ns171/ns128/networking_solutions_white_papers_list.html

New Member

Re: Security considerations for Ethernet connection to ISP

Thank you for the response. I have been reading over the white papers you referenced and terminating to a security applicance seems to be the best option. Thanks.

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