ICMP stopped working?

Support
,
1

In the past ICMP pings to netlify domains worked, but they seem to have recently stopped.

For example, www.chrisbentzel.com DNS configuration shows it is a CNAME for brave-mahavira-e1bab3.netlify.app

;; ANSWER SECTION:
www.chrisbentzel.com. 3440 IN CNAME brave-mahavira-e1bab3.netlify.app.
brave-mahavira-e1bab3.netlify.app. 20 IN A 54.84.236.175
brave-mahavira-e1bab3.netlify.app. 20 IN A 35.169.59.174

pinging the domain name or the IP addresses directly shows no ICMP traffic going through. I am seeing ICMP traffic succeed on other addresses so do not think this is a local firewall issue or similar.

I am also seeing this behavior on other netlify hosted pages on different domains.

I looked at the new firewall traffic rules and they have “Allow all traffic” set.

2

Note: I’m guessing this was either intended (with new firewall behavior) or unexpected but not part of guaranteed behavior of netlify - so understand if it no longer works.

3

Not sure if this was ever intended. I can confirm this with the devs, but could you share your use case here? Why is this important to you?

5

The devs confirmed that this has recently changed. We were changing some stuff on the CDN-level for a long time and we just finished last week. This new technology does not support proxying ICMP, so it’s unlikely we can get it back. We’d recommend doing a HTTP probe for monitoring purposes.

6

Yes, this was for a simple reachability/liveness test. Thanks for taking the time out to explain that it is unlikely to work!