Hi everyone,

So I'm trying to install the Jenkins server on a running EC2 instance that was pre-created on AWS (CentOS-based environment).

I have conducted all the necessary steps in advance:

• Downloaded and installed Jenkins (from the repository)
• Created inbound and outbound rules (SSH, HTTP on port 80, HTTPS on port 443; TCP on port 8080) for both the Instance itself and Network ACLs
• The Jenkins service is up and running

​

systemctl status jenkins
● jenkins.service - LSB: Jenkins Automation Server
   Loaded: loaded (/etc/rc.d/init.d/jenkins; generated)
   Active: active (exited) since Thu 2022-01-13 13:01:08 UTC; 50min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 1035 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=0/SUCCESS)
    Tasks: 0 (limit: 4724)
   Memory: 0B
   CGroup: /system.slice/jenkins.service

Jan 13 13:01:05 ip-172-31-93-145.ec2.internal systemd[1]: Starting LSB: Jenkins Automation Server...
Jan 13 13:01:05 ip-172-31-93-145.ec2.internal runuser[1060]: pam_unix(runuser:session): session opened for user jenkins by (uid=0)
Jan 13 13:01:08 ip-172-31-93-145.ec2.internal runuser[1060]: pam_unix(runuser:session): session closed for user jenkins
Jan 13 13:01:08 ip-172-31-93-145.ec2.internal jenkins[1035]: Starting Jenkins [  OK  ]
Jan 13 13:01:08 ip-172-31-93-145.ec2.internal systemd[1]: Started LSB: Jenkins Automation Server.

​

The only issue I am struggling with is accessing Jenkins via the Web (from my local browser) so I can finish the rest of the configuration process. I tried both the hostname and IP address on port 8080 but I am still getting the "This site can’t be reached" error.

https://preview.redd.it/j8m3175ulgb81.png?width=917&format=png&auto=webp&s=80f1e92dbb5863f9ade05f8a3ef66b77722b809b

Here is the output I have after running the netstat command:

netstat -apn | grep :
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1037/sshd           
tcp        0     36 172.31.93.145:22        178.221.182.72:37512    ESTABLISHED 1435/sshd: ec2-user 
tcp6       0      0 :::22                   :::*                    LISTEN      1037/sshd           
udp        0      0 127.0.0.1:323           0.0.0.0:*                           703/chronyd         
udp        0      0 172.31.93.145:68        172.31.80.1:67          ESTABLISHED 805/NetworkManager  
udp6       0      0 ::1:323                 :::*                                703/chronyd         
unix  2      [ ]         DGRAM                    27872    1435/sshd: ec2-user  
unix  2      [ ]         STREAM     CONNECTED     27506    1435/sshd: ec2-user  
unix  3      [ ]         STREAM     CONNECTED     27879    1435/sshd: ec2-user  
unix  2      [ ]         STREAM     CONNECTED     27526    1435/sshd: ec2-user  
unix  3      [ ]         STREAM     CONNECTED     27878    1449/sshd: ec2-user

​

Solutions I have tried so far:

firewall-cmd --zone=public --add-port=8080/tcp --permanent
firewall-cmd --zone=public --add-service=http --permanent
firewall-cmd --zone=public --add-service=jenkins --permanent
firewall-cmd --zone=public --add-source=172.31.93.145/20 --permanent
firewall-cmd --reload
firewall-cmd --list-all

​

Do you have any suggestions?