Hi it seems my droplet is blocking Text Event Stream (Server Sent Event) output outside of host. Seems like a firewall issue but not able to find how to open.
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×Hi there @rakibmail22,
I believe that the Server-sent events are just standard HTTP so you should only need port 80 open.
Can you share the output of the following command here:
Question
- sudo netstat -plant
Also if you have a firewall enabled, can you share the rules as well?
Regards,
Bobby
Below is the output. My application is running on port 30180. Other endpoint of this application works fine. Only the endpoint that produces TEXT EVENT STREAM cannot be accessed from outside host.
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:32000 0.0.0.0:* LISTEN 18963/kube-proxy
tcp 0 0 0.0.0.0:30180 0.0.0.0:* LISTEN 18963/kube-proxy
tcp 0 0 127.0.0.1:10248 0.0.0.0:* LISTEN 18954/kubelet
tcp 0 0 0.0.0.0:25000 0.0.0.0:* LISTEN 19168/python3
tcp 0 0 0.0.0.0:31017 0.0.0.0:* LISTEN 18963/kube-proxy
tcp 0 0 127.0.0.1:10249 0.0.0.0:* LISTEN 18963/kube-proxy
tcp 0 0 127.0.0.1:10251 0.0.0.0:* LISTEN 18964/kube-schedule
tcp 0 0 127.0.0.1:10252 0.0.0.0:* LISTEN 18951/kube-controll
tcp 0 0 127.0.0.1:2380 0.0.0.0:* LISTEN 18952/etcd
tcp 0 0 127.0.0.1:10256 0.0.0.0:* LISTEN 18963/kube-proxy
tcp 0 0 0.0.0.0:31409 0.0.0.0:* LISTEN 18963/kube-proxy
tcp 0 0 127.0.0.1:37393 0.0.0.0:* LISTEN 18950/containerd
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 803/systemd-resolve
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1045/sshd
tcp 0 0 127.0.0.1:1338 0.0.0.0:* LISTEN 18950/containerd
tcp 0 0 127.0.0.1:44462 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44392 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44374 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44488 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44370 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44358 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44436 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44400 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 10.1.35.1:54518 10.1.35.19:8024 TIME_WAIT -
tcp 0 0 127.0.0.1:44398 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44478 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:47790 127.0.0.1:16443 ESTABLISHED 18954/kubelet
tcp 0 0 127.0.0.1:44458 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44378 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44454 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44390 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44448 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 3384 139.59.14.156:22 43.230.120.15:39893 ESTABLISHED 19731/sshd: root@pt
tcp 0 0 127.0.0.1:44408 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44440 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:47612 127.0.0.1:16443 ESTABLISHED 18964/kube-schedule
tcp 0 0 127.0.0.1:44410 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44354 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44452 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:47714 127.0.0.1:16443 ESTABLISHED 18951/kube-controll
tcp 0 0 127.0.0.1:44428 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44414 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44472 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44318 127.0.0.1:12379 ESTABLISHED 18952/etcd
tcp 0 0 127.0.0.1:44430 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44470 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44416 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44364 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44362 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44356 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44396 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44486 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44476 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44382 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44484 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44420 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 10.1.35.1:54610 10.1.35.19:8024 TIME_WAIT -
tcp 0 0 127.0.0.1:44366 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44386 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44434 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44474 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 139.59.14.156:22 218.92.0.200:45762 SYN_RECV -
tcp 0 0 127.0.0.1:44368 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44450 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44380 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44432 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44348 127.0.0.1:12379 ESTABLISHED 18953/flanneld
tcp 0 0 127.0.0.1:44406 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44490 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44466 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44394 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44404 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44460 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:47610 127.0.0.1:16443 ESTABLISHED 18963/kube-proxy
tcp 0 0 127.0.0.1:44418 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44442 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44376 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44446 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44360 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44388 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44402 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44468 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44480 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44424 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44482 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44438 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44384 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44412 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44372 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44350 127.0.0.1:12379 ESTABLISHED 18953/flanneld
tcp 0 0 127.0.0.1:44456 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 10.1.35.1:54562 10.1.35.19:8024 TIME_WAIT -
tcp 0 0 127.0.0.1:44422 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44426 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp 0 0 127.0.0.1:44464 127.0.0.1:12379 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 :::1024 :::* LISTEN 30033/docker-proxy
tcp6 0 0 :::10250 :::* LISTEN 18954/kubelet
tcp6 0 0 :::10255 :::* LISTEN 18954/kubelet
tcp6 0 0 :::50000 :::* LISTEN 30020/docker-proxy
tcp6 0 0 :::10257 :::* LISTEN 18951/kube-controll
tcp6 0 0 :::10259 :::* LISTEN 18964/kube-schedule
tcp6 0 0 :::22 :::* LISTEN 1045/sshd
tcp6 0 0 :::16443 :::* LISTEN 18943/kube-apiserve
tcp6 0 0 :::12379 :::* LISTEN 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44440 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44438 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:16443 127.0.0.1:47790 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44380 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44362 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44424 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:16443 127.0.0.1:47612 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44484 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44434 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44450 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44416 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44404 ESTABLISHED 18952/etcd
tcp6 0 0 ::1:16443 ::1:53422 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44480 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44378 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44464 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44460 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44360 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44442 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44410 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:16443 127.0.0.1:47714 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44412 ESTABLISHED 18952/etcd
tcp6 0 0 139.59.14.156:16443 10.1.35.15:59336 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44458 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44318 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44418 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44482 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44348 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44406 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44400 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44386 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44448 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44462 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:16443 127.0.0.1:47610 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44468 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44396 ESTABLISHED 18952/etcd
tcp6 0 0 139.59.14.156:16443 10.1.35.17:50222 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 ::1:53422 ::1:16443 ESTABLISHED 18943/kube-apiserve
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44370 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44430 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44422 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44354 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44364 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44490 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44382 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44426 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44392 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44350 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44478 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44358 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44376 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44414 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44472 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44398 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44420 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44466 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44390 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44368 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44374 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44488 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44372 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44436 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44388 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44428 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44384 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44356 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44366 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44470 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44446 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44452 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44474 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44432 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44402 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44456 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44394 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44454 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44476 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44486 ESTABLISHED 18952/etcd
tcp6 0 0 127.0.0.1:12379 127.0.0.1:44408 ESTABLISHED 18952/etcd