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Assign static IP with direct cable into modem (no router)

Hi Experts;
Here's my configuration:
1 PC (win 7) cabled directly into a DSL modem.
I want to make my IP static.

I've set the IP with properties on Local network connection; IPv4 ~ but when I validate the connection the Windows Network diagnostics t-shooter wants me to enable DHCP, which undoes my static settings.

No router involved.
Attached are screen shots of properties before & after I change settings.
before.png
attempted-setting-change.png
Tshoot-report.png
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k heitz
Asked:
k heitz
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3 Solutions
 
iammorrisonCommented:
Why didnt you set the mask? It will try to troubleshoot because its missing  info
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tailoreddigitalCommented:
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GeisrudSystems AdministratorCommented:
Going directly into a DSL modem, your IP (which will be a public IP address) is assigned by your ISP.

If you want a static IP address, you can usually pay a bit extra to the ISP - even then, it is handled on their end, and you still should keep your configuration set to DHCP.
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iammorrisonCommented:
Geisrud makes a good point. We were assuming that you purchased a static address from your provider, but can you confirm whether this is the case?
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k heitzsoftware developerAuthor Commented:
Thank you everyone.
I had not purchased a static IP from my ISP. I have a call into them now.
The subnet mask was set to 255.255.255.0 but it wasn't in the graphic.

One other question, If I go w/ the static IP; is my system at high risk of attack?
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tailoreddigitalCommented:
"One other question, If I go w/ the static IP; is my system at high risk of attack?"

The link i posted answers this question
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iammorrisonCommented:
Also, that mask most likely would not have worked either way. You were assuming the address had a 24 bit mask.
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k heitzsoftware developerAuthor Commented:
Thanks again all.
We've decided against the static IP. I appreciate the information from all of you.
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tailoreddigitalCommented:
You can use a service to make a dynamic IP function like a static via a hostname,

FYI,
dyndns.com
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