{"slug":"troubleshoot-oracle-cloud-devices","title":"Troubleshoot Oracle cloud devices","tags":["tailscale","access-control","devices"],"agent_summary":"Last validated: Mar 20, 2026","trigger_phrases":[],"runnable":false,"markdown":"\r\n# Troubleshoot Oracle cloud devices\r\n\r\nLast validated: Mar 20, 2026\r\n\r\nIf you find that your Tailscale network (known as a tailnet) nodes cannot access your [Oracle Cloud Linux VM](https://tailscale.com/docs/install/cloud/oracle-cloud), you may need to update the VM's `iptables` configuration.\r\n\r\nBefore you modify `iptables`, make a backup of the current configuration:\r\n\r\n```shell\r\nsudo iptables-save > ~/iptables.old\r\n```\r\n\r\nCheck your current `iptables` configuration by running:\r\n\r\n```shell\r\nsudo iptables --list --line-numbers\r\n```\r\n\r\nIf you want to provide HTTP access from your tailnet to the VM, run:\r\n\r\n```shell\r\nsudo iptables -I INPUT 6 -m state --state NEW -p tcp --dport 80 -j ACCEPT\r\nsudo netfilter-persistent save\r\n```\r\n\r\nAlternatively, if you find a specific rule that is rejecting your ingress access, you can delete it by line number:\r\n\r\n```shell\r\nsudo iptables -D INPUT \r\n```\r\n\r\nCheck the `iptables` list again to make sure your change is in effect.\r\n\r\n```shell\r\nsudo iptables --list --line-numbers\r\n```\r\n\r\nThen, try accessing the Oracle Cloud Linux VM from your tailnet node again.\r\n\r\n![Project Logo](https://cdn.brandfetch.io/tailscale.com/fallback/lettermark/theme/dark/h/256/w/256/icon?c=1bfwsmEH20zzEfSNTed)\r\n\r\nAsk AI\r\n\r\nreCAPTCHA\r\n\r\nRecaptcha requires verification.\r\n\r\nprotected by **reCAPTCHA**\r\n","html":"

Troubleshoot Oracle cloud devices

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Last validated: Mar 20, 2026

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If you find that your Tailscale network (known as a tailnet) nodes cannot access your Oracle Cloud Linux VM, you may need to update the VM's iptables configuration.

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Before you modify iptables, make a backup of the current configuration:

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sudo iptables-save > ~/iptables.old\n
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Check your current iptables configuration by running:

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sudo iptables --list --line-numbers\n
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If you want to provide HTTP access from your tailnet to the VM, run:

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sudo iptables -I INPUT 6 -m state --state NEW -p tcp --dport 80 -j ACCEPT\r\nsudo netfilter-persistent save\n
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Alternatively, if you find a specific rule that is rejecting your ingress access, you can delete it by line number:

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sudo iptables -D INPUT <line-number>\n
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Check the iptables list again to make sure your change is in effect.

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sudo iptables --list --line-numbers\n
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Then, try accessing the Oracle Cloud Linux VM from your tailnet node again.

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