It's a fairly common practice for schools and universities to block sites that they deem inappropriate. For example here's a snippet from Azusa Pacific University's Internet Filtering policy:
APU’s internet filtering is performed through a
subscription service. The hardware and database, referred to as an
application in this policy, is developed and maintained by a
nationally recognized, publicly held company.
How Filtering Works
The internet filtering mechanism uses several
categorization technologies to group URLs. These include human review,
a licensed contextual URL filtering engine, internally developed
neural net analysis programs, and automated recognition of content
labels generated by the Internet Content Rating Association that web
developers often put on their sites. In addition, to ensure that
categories are continually refreshed with new URLs, the mechanism
relies on a technology called adaptive filtering, which automatically
logs accesses by existing users to URLs that are not included in the
existing categorized database. These URLs are then sent to a central
repository, where they are reviewed along with the requests of other
filtering appliances that subscribe to this service on a daily basis.
The URLs are then categorized, added to the database, and an updated
database is automatically sent to APU’s filtering appliance. The same
process works similarly in reverse when a legitimate website has been
labeled inappropriately—the customer appliance marks the URL as
legitimate, and the URL is uploaded to the central repository and
So your blocking is likely being done by your College.
If you're still unsure you can also use an online service such as downforeveryoneorjustme to also confirm if the website you're trying to access is actually down or if it's just your college that's blocking it.
Based on one of your updates to your question I was able to find some additional information regarding Eduroam. Here's an excerpt from their FAQ.
Does eduroam monitor or filter access?
eduroam provides authenticated
network access at any location where the service is enabled.
Each participating organisation offering network access to
authenticated users is able to apply its own filtering policies as
long as it is clearly informing users about the filtering rules.
And also from their legal disclaimer:
GÉANT may add, revise or remove any content, and vary the site’s
navigational structure, without notice.
Methods to further test
To investigate your supposed filtering you can attempt to look up the IP address of the website's domain and then use
curl to verify if you're being filtered at a particular point or if you're having a legitimate technical difficulty.
For example, using the command
host to look up the IP:
$ host nytimes.com
nytimes.com has address 126.96.36.199
nytimes.com has address 188.8.131.52
nytimes.com has address 184.108.40.206
nytimes.com has address 220.127.116.11
nytimes.com mail is handled by 5 ALT1.ASPMX.L.GOOGLE.com.
nytimes.com mail is handled by 10 ASPMX3.GOOGLEMAIL.com.
nytimes.com mail is handled by 1 ASPMX.L.GOOGLE.com.
nytimes.com mail is handled by 5 ALT2.ASPMX.L.GOOGLE.com.
nytimes.com mail is handled by 10 ASPMX2.GOOGLEMAIL.com.
And you could also use
ping to see if you're able to ping the IP addresses and/or hostname of the domain you're attempting to view.
$ ping -c 3 18.104.22.168
PING 22.214.171.124 (126.96.36.199): 56 data bytes
64 bytes from 188.8.131.52: icmp_seq=0 ttl=56 time=26.398 ms
64 bytes from 184.108.40.206: icmp_seq=1 ttl=56 time=20.649 ms
64 bytes from 220.127.116.11: icmp_seq=2 ttl=56 time=21.376 ms
--- 18.104.22.168 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 20.649/22.808/26.398/2.556 ms
Lastly you can use
curl to see if you have physical access to the website's ports 80 and 443 which are where web content is typically served.
$ curl -v telnet://22.214.171.124:443
* Rebuilt URL to: telnet://126.96.36.199:443/
* Trying 188.8.131.52...
* TCP_NODELAY set
* Connected to 184.108.40.206 (220.127.116.11) port 443 (#0)
NOTE: Use Ctrl+C to stop the
curl command. If you see
Connected ... then you know you at least have physical access to the server's port 443.