Hi all,
I’m touching base with Graylog after years of absent. I know, what was I thinking 
I’m struggling with something that to me looks pretty basic.
I’m running my install on Ubuntu 25.04 with Graylog open for testing.
I have followed the guide from Graylog own site using the open install option.
All my Graylog service are running fine:
graylog-datanode.service - Graylog data node
Loaded: loaded (/usr/lib/systemd/system/graylog-datanode.service; enabled; preset: enabled)
Active: active (running) since Tue 2025-10-14 04:34:45 UTC; 1min 55s ago
graylog-server.service - Graylog server
Loaded: loaded (/usr/lib/systemd/system/graylog-server.service; enabled; preset: enabled)
Active: active (running) since Tue 2025-10-14 04:34:45 UTC; 2min 5s ago
mongod.service - MongoDB Database Server
Loaded: loaded (/usr/lib/systemd/system/mongod.service; enabled; preset: enabled)
Active: active (running) since Tue 2025-10-14 04:34:45 UTC; 2min 21s ago
My goal is to have graylog respond on say graylog.aaaa.bb
When my server got up and running after the install i could see that it was listning on port 9000 for 127.0.0.1.
I figured i needed to change this as to get it to bind to a hostname graylog.aaaa.bb
So as per the documentation i went to
sudo nano /etc/graylog/server/server.conf
and went to this part:
#HTTP bind address
#Default: 127.0.0.1:9000
#http_bind_address = 127.0.0.1:9000
#http_bind_address = [2001:db8::1]:9000
http_bind_address = 127.0.0.1:9000
And changed it to
http_bind_address = graylog.aaaa.bb
This didn’t seem to work.I could also see that graylog stopped listening on port 9000. I tried reboot even.
I tried changing it to ip like 10.0.0.1:9000 but that didn’t work either.
and now when i change it back to 127.0.0.1:9000 it won’t listen on port 9000.
In the documentation it also says you need to set bindipall in the mondoDB conf file which i have to graylog.aaaa.bb and i have edited the hosts file so the server can resolve itself to that name. Also i do see lots of open connection on the server on port 27017.
The documentation also mentioned that the datanode needs a mongod uri url. For which i also used mongod://graylog.aaaa.bb:27017/graylog
I suspect this works and that the connection i see to port 27017 is perhaps the datanode connecting to mongod and also perhaps mongod just listing on 27017.
Basically what i get from the documentation is that i need to change http_bind_address in the graylog conf file in order to change what url graylog is listening on. And it doesn’t seem to work.
I’m so CLOSE!!! i can feel it.. it just need this one hint to get passed this but i’m SO stumped. Please help!