Turn off your Firewall:

sudo ufw disable on Ubuntu or sudo systemctl stop firewalld on CentOS 7

Then try accessing the dashboard.

If it still doesn't work, than run sudo iptables -F to flush the iptables.

Than re-enable the firewall later either in the Security Section or by install the SYS Firewall plugin from the App Store.

Actually, you don't have to run the disable firewall command. You can just run the sudo iptables -F command instead. However if that doesn't work, then you would have to run the disable firewall command

9 months later

hello I changed the port from 7800 to 8888 and now the aapanel does not come in, it is not possible to find this page

    aaP_wagnerlimawwnpr
    Hello, is port 8888 open in the system firewall? Is the server provider's firewall open on port 8888?
    The system firewall can open the firewall by executing the following commands:
    firewall-cmd --permanent --zone=public --add-port=8888/tcp >/dev/null 2>&1
    /sbin/ufw allow 8888/tcp

    The server provider needs to open to the provider's background.
    Is the link fully entered? You can use the bt 14 command to view the default link

      a year later

      It encountering any problems?
      Warning:
      If you cannot access the panel,
      release the following port (7800|888|80|443|20|21) in the security group

        aaPanel_Kern Name : AllowPort80
        DisplayName : Allow Port 80
        Description :
        DisplayGroup :
        Group :
        Enabled : True
        Profile : Any
        Platform : {}
        Direction : Inbound
        Action : Allow
        EdgeTraversalPolicy : Block
        LooseSourceMapping : False
        LocalOnlyMapping : False
        Owner :
        PrimaryStatus : OK
        Status : 已从存储区成功分析规则。 (65536)
        EnforcementStatus : NotApplicable
        PolicyStoreSource : PersistentStore
        PolicyStoreSourceType : Local
        RemoteDynamicKeywordAddresses : {}
        PolicyAppId 😀

        Name : AllowPort7800
        DisplayName : Allow Port 7800
        Description :
        DisplayGroup :
        Group :
        Enabled : True
        Profile : Any
        Platform : {}
        Direction : Inbound
        Action : Allow
        EdgeTraversalPolicy : Block
        LooseSourceMapping : False
        LocalOnlyMapping : False
        Owner :
        PrimaryStatus : OK
        Status : 已从存储区成功分析规则。 (65536)
        EnforcementStatus : NotApplicable
        PolicyStoreSource : PersistentStore
        PolicyStoreSourceType : Local
        RemoteDynamicKeywordAddresses : {}
        PolicyAppId :

          aaPanel_Kern -A IN_public_allow -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW,UNTRACKED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 20 -m conntrack --ctstate NEW,UNTRACKED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 21 -m conntrack --ctstate NEW,UNTRACKED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW,UNTRACKED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 80 -m conntrack --ctstate NEW,UNTRACKED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 7800 -m conntrack --ctstate NEW,UNTRACK ED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 39000:40000 -m conntrack --ctstate NEW, UNTRACKED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 8888 -m conntrack --ctstate NEW,UNTRACK ED -j ACCEPT
          -A IN_public_allow -p tcp -m tcp --dport 55555 -m conntrack --ctstate NEW,UNTRAC KED -j ACCEPT
          COMMIT

          Completed on Thu Sep 14 10:18:17 2023

              Hello, please check whether the bt service is running: bt status
              If it is not running, it will be useless if you open the port. If it is not running, please start it: bt start
              If it cannot run please check the log: bt 22

              aaP_xiaoyeoh8888

                  aaP_xiaoyeoh8888
                  Hi, can you give us your aapanel information? The server makes a snapshot backup first, if possible, please send it to kern@aapanel.com.
                  It is recommended to fill in the following
                  Post link:
                  SSH IP address, account password and port:
                  aapanel login link address and account password:

                  No post link will not be able to know which user's information is, and the problem will not be processed