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# Idols - Aquamarine
A router(IPv4 only) with a tranparent proxy to bypass the G|F|W.
A router(IPv4 only) with a transparent proxy to bypass the G|F|W.
NOTE: dae(running on aquamarine) do not provides a http/socks5 proxy server, so a v2ray server is running on [idols_kana](../idols_kana/proxy.nix) to provides a http/socks5 proxy service.
NOTE: dae(running on aquamarine) do not provides a http/socks5 proxy server, so a v2ray server is
running on [idols_kana](../idols_kana/proxy.nix) to provides a http/socks5 proxy service.
## Troubleshooting
### Can not access the global internet
1. Check wether the subscription url is accessible.
1. Check whether the subscription url is accessible.
- If not, then you need to get a new subscription url and update the `dae`'s configuration.
1. Check the `dae` service's log by `journalctl -u dae -n 1000`.
@@ -24,19 +25,24 @@ NOTE: dae(running on aquamarine) do not provides a http/socks5 proxy server, so
1. `ss -tunlp`, check if `dnsmasq` is running and listening on udp port 67.
1. `journalctl -u dnsmasq -n 1000` to check the log of `dnsmasq`.
1. Request a new IP address by disconnect and reconnect one of your devices' wifi.
1. `nix shell nixpkgs#dhcpdump` and then `sudo dhcpdump -i br-lan`, check if the DHCP request is received by `dnsmasq`.
1. `nix shell nixpkgs#dhcpdump` and then `sudo dhcpdump -i br-lan`, check if the DHCP request is
received by `dnsmasq`.
1. The server listens on UDP port number 67, and the client listens on UDP port number 68.
1. DHCP operations fall into four phases:
1. Server **discovery**: The DHCP client broadcasts a DHCPDISCOVER message on the network subnet using the destination address 255.255.255.255 (limited broadcast) or the specific subnet broadcast address (directed broadcast).
1. IP lease **offer**: When a DHCP server receives a DHCPDISCOVER message from a client, which is an IP address lease request, the DHCP server reserves an IP address for the client and makes a lease offer by sending a DHCPOFFER message to the client.
1. IP lease **request**: In response to the DHCP offer, the client replies with a DHCPREQUEST message, broadcast to the server,[a] requesting the offered address.
1. IP lease **acknowledgement**: When the DHCP server receives the DHCPREQUEST message from the client, it sends a DHCPACK packet to the client, which includes the lease duration and any other configuration information that the client might have requested.
1. Server **discovery**: The DHCP client broadcasts a DHCPDISCOVER message on the network
subnet using the destination address 255.255.255.255 (limited broadcast) or the specific
subnet broadcast address (directed broadcast).
1. IP lease **offer**: When a DHCP server receives a DHCPDISCOVER message from a client, which
is an IP address lease request, the DHCP server reserves an IP address for the client and
makes a lease offer by sending a DHCPOFFER message to the client.
1. IP lease **request**: In response to the DHCP offer, the client replies with a DHCPREQUEST
message, broadcast to the server,[a] requesting the offered address.
1. IP lease **acknowledgement**: When the DHCP server receives the DHCPREQUEST message from
the client, it sends a DHCPACK packet to the client, which includes the lease duration and
any other configuration information that the client might have requested.
1. So if you see only `DISCOVER` messages, the dhsmasq is not working properly.
## References
- <https://github.com/ghostbuster91/blogposts/blob/main/router2023-part2/main.md>
- <https://github.com/ghostbuster91/nixos-router>