英文:
Ports won't open on OCI subnet
问题
我使用的是Oracle Cloud（免费层），端口无法打开。使用的是Ubuntu 22.04 LTS，无法联系Oracle获取支持，因为免费层不包括支持。
我尝试通过指定端口和打开所有端口来打开端口（明确一下，这不是我的意图，我只是试图让它们打开），无论我使用什么设置。
端口配置
英文:
I am using Oracle Cloud (free tier) and the ports will not open. Using Ubuntu 22.04 LTS and cannot contact Oracle for support as the free tier doesn't include it.
I have tried opening ports by specifying them, and just opening all ports (to be clear this is not what I intend to do, I am just attempting to get them to open at all) and no matter what settings I use.
Port Configuration
答案1
得分: 1
@pmdba 正确，你应该检查本地防火墙规则。
在Ubuntu上，规则保存在 /etc/iptables/rules.v4
如果你想打开80/TCP端口，你可以编辑这个文件并包括以下内容：
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
记得在以下行之前添加它：
-A INPUT -j REJECT --reject-with icmp-host-prohibited
这个规则拒绝一切。
之后：
sudo iptables-restore < /etc/iptables/rules.v4
你也可以手动运行iptables来添加所需的规则，一旦满意，记得保存。在保存之前要记得备份 :). 你可以使用以下命令保存：
sudo iptables-save > /etc/iptables/rules.v4
英文:
@pmdba is correct, and you should check the local firewall rules.
On ubuntu, the rules are saved in /etc/iptables/rules.v4
If you want to open port 80/TCP, you can edit this file and include the following:
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
Remember to add it before:
-A INPUT -j REJECT --reject-with icmp-host-prohibited
This rule rejects everything.
After that:
sudo iptables-restore < /etc/iptables/rules.v4
You can also run iptables manually to add the desired rule(s), and once you are satisfied, save it. Remember to save and make a backup before :). You can save using:
sudo iptables-save > /etc/iptables/rules.v4
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