Short CloudLab Utah network downtime on Wednesday, June 17 at 8 AM MDT
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Robert Ricci
Jun 4, 2026, 7:39:47 PMJun 4
to cloudlab-users
On Wednesday, June 17, we will be adding a firewall to the control network at the CloudLab Utah site starting at 8 AM MDT / 1400 UTC.
Utah nodes will lose access to the control network and the Internet for up to 2 hours. They will not be rebooted.
Nodes at other sites will not be affected.
After the downtime, the firewall will have the following effects for *incoming* traffic from the Internet:
* The only low ports (<1024) allowed will be ssh (22), http (80), and https (443)
* High ports will be allowed except for a few commonly associated with NFS and vulnerable Windows services
All outgoing traffic will still be allowed, and the firewall will not affect the experiment network at all.
Utah nodes will lose access to the control network and the Internet for up to 2 hours. They will not be rebooted.
Nodes at other sites will not be affected.
After the downtime, the firewall will have the following effects for *incoming* traffic from the Internet:
* The only low ports (<1024) allowed will be ssh (22), http (80), and https (443)
* High ports will be allowed except for a few commonly associated with NFS and vulnerable Windows services
All outgoing traffic will still be allowed, and the firewall will not affect the experiment network at all.
cloudlab-users
Jun 10, 2026, 6:56:13 PMJun 10
to cloudlab-users
A reminder that this downtime for the Utah cluster is one week from today. Expect all Cloudlab Utah resources to be inaccessible from 8AM MDT for two hours.
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