ssh 連線問題 - Linux

我網路不熟所以上來問一下

我有AB兩台桌機

A桌機ip是DHCP 取得, ip不是實體ip
B桌機 用pppoe 取得 ip 實體浮動ip

那我想用ssh透過桌機連到 raspberry pi 板子, 板子也是用pppoe 取得實體浮動IP

A桌機無法透過ssh 連到板子會卡住 , 但是B桌機可以順利連上板子

下面是ssh 訊息

ssh -vvv [email protected]
OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g 1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "175.180.118.217" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 175.180.118.217 [175.180.118.217] port 22.
debug1: Connection established.
debug1: identity file /home/shihyu/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/shihyu/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/shihyu/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/shihyu/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/shihyu/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/shihyu/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/shihyu/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/shihyu/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1

這樣可能是什麼原因造成？

謝謝

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