我有一个 debian 服务器,用作 wifi 路由器和 DHCP 和 FTP 服务器。
我想使用佳能无线文件传输器连接到该服务器。
我可以连接并接收 IP 地址。我可以在系统日志中验证这一点:
Aug 4 21:37:02 box-3 hostapd: wlan0: STA 00:00:85:ff:81:cc IEEE 802.11: authenticated
Aug 4 21:37:02 box-3 hostapd: wlan0: STA 00:00:85:ff:81:cc IEEE 802.11: associated (aid 2)
Aug 4 21:37:02 box-3 hostapd: wlan0: STA 00:00:85:ff:81:cc RADIUS: starting accounting session 501D7991-00000002
Aug 4 21:37:02 box-3 dhcpd: DHCPDISCOVER from 00:00:85:ff:81:cc via wlan0
Aug 4 21:37:02 box-3 dhcpd: DHCPOFFER on 10.10.0.24 to 00:00:85:ff:81:cc via wlan0
Aug 4 21:37:02 box-3 dhcpd: DHCPDISCOVER from 00:00:85:ff:81:cc via wlan0
Aug 4 21:37:02 box-3 dhcpd: DHCPOFFER on 10.10.0.24 to 00:00:85:ff:81:cc via wlan0
Aug 4 21:37:02 box-3 dhcpd: DHCPREQUEST for 10.10.0.24 (10.10.0.1) from 00:00:85:ff:81:cc via wlan0
Aug 4 21:37:02 box-3 dhcpd: DHCPACK on 10.10.0.24 to 00:00:85:ff:81:cc via wlan0
Aug 4 21:37:02 box-3 dhcpd: DHCPREQUEST for 10.10.0.24 (10.10.0.1) from 00:00:85:ff:81:cc via wlan0
Aug 4 21:37:02 box-3 dhcpd: DHCPACK on 10.10.0.24 to 00:00:85:ff:81:cc via wlan0
但是,文件传输器似乎在发现或连接 FTP 服务器时遇到问题。
当我尝试 ping IP 地址时,有时可以访问文件传输器,之后连接打开并且文件传输器可以访问 FTP 服务器。
但这并不总是有效。
我尝试对 wlan0 设备上的所有流量进行 tcpdump,但得到的只是一些 ARP 请求。
我可以用哪些方法调试这个问题?