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Hi all, I downloaded the DLC for MW3, it works perfectly on Plutonium, thanks. However, I would like to play the additional DLC missions in Special Ops on Steam. I tried, but they are not unlocked on Steam/Co-op mode. Is there any way to achieve this and getting the DLC for free? I am not greedy but I am not very willing to pay $50 for like 10-15 missions.
Thanks in advance.
only advice i could give to ppl having same is to wait a couple of days and try again
idk what happened but suddenly I can play mw3 again though I didnt change anything?! not even my dns servers as Dss0 suggests.
I wished I could drop a solution to help future players encountering the same problem, but I honestly have no idea what this caused or why I am able to play mw3 again.
Thanks for all the support though, I can enjoy mw3 again 
I even turned my router firewall (picture, both ipv4 and ipv6) and PC firewall completely off and it is still giving the error. Look, I am pretty sure my ISP's firewall is blocking it, since this all happens out of the blue. What is the IP-address I should ask for to unblock when I call customer support?
@Mr-Android My ISP is called 'Zeelandnet' (from the Netherlands). However, I am able to connect to MW3 using a VPN, so the cause is indeed on my side. The weird thing is that I played yesterday without any problems. I only play on the infected server from Artyx. I absolutely didn't change anything to my local- or router firewall settings. I even re-checked. I also went through the 'known error problem solving' section to find a possible solution, but couldn't find anything useful, unfortunatly.
Tbh, I indeed think my ISP is the culprit. What else could it be since I didn't touched anything.
@Mr-Android Are you able to start MW3, Mr. Android? I think the problem is not on my side tbh.
Like this?
@Mr-Android
I just played last week, even yesterday without any problems. I checked my firewall, plutonium is completely allowed. This is weird 
yeah what does this mean i exaclty got the same
Failed to fetch info: non-success status code: 403 403 Forbidden
What the does that mean?