Security

可疑的網路活動:sshd 程序與 lsof 一起出現

  • January 12, 2017

我有一個執行 Debian Jessie 的樹莓派。我安裝了 pi-hole 來阻止廣告服務域 ( https://pi-hole.net )。通過日誌,我注意到很多來自中文域的查詢。

lsof -i向我展示了以下我認為可疑的列表:

> sshd      1742             root    3u  IPv4  16960      0t0  TCP
> raspberrypi:ssh->116.31.116.47:50600 (ESTABLISHED) sshd      1743     
> sshd    3u  IPv4  16960      0t0  TCP
> raspberrypi:ssh->116.31.116.47:50600 (ESTABLISHED) sshd      1774     
> root    3u  IPv4  16990      0t0  TCP
> raspberrypi:ssh->183.214.141.105:56265 (ESTABLISHED) sshd      1775   
> sshd    3u  IPv4  16990      0t0  TCP
> raspberrypi:ssh->183.214.141.105:56265 (ESTABLISHED) sshd      1869   
> root    3u  IPv4  17068      0t0  TCP
> raspberrypi:ssh->116.31.116.47:33525 (ESTABLISHED) sshd      1870     
> sshd    3u  IPv4  17068      0t0  TCP
> raspberrypi:ssh->116.31.116.47:33525 (ESTABLISHED) sshd      1910     
> root    3u  IPv4  17122      0t0  TCP
> raspberrypi:ssh->116.31.116.47:35816 (ESTABLISHED) sshd      1911     
> sshd    3u  IPv4  17122      0t0  TCP
> raspberrypi:ssh->116.31.116.47:35816 (ESTABLISHED) sshd      1931     
> root    3u  IPv4  17158      0t0  TCP
> raspberrypi:ssh->116.31.116.47:49492 (ESTABLISHED) sshd      1932     
> sshd    3u  IPv4  17158      0t0  TCP
> raspberrypi:ssh->116.31.116.47:49492 (ESTABLISHED) sshd      1935     
> root    3u  IPv4  17163      0t0  TCP
> raspberrypi:ssh->183.214.141.105:23828 (ESTABLISHED) sshd      1936   
> sshd    3u  IPv4  17163      0t0  TCP
> raspberrypi:ssh->183.214.141.105:23828 (ESTABLISHED) sshd      1937   
> root    3u  IPv4  17168      0t0  TCP
> raspberrypi:ssh->116.31.116.47:53628 (ESTABLISHED) sshd      1938     
> sshd    3u  IPv4  17168      0t0  TCP
> raspberrypi:ssh->116.31.116.47:53628 (ESTABLISHED) sshd      1940     
> root    3u  IPv4  17176      0t0  TCP
> raspberrypi:ssh->116.31.116.47:57858 (ESTABLISHED) sshd      1941     
> sshd    3u  IPv4  17176      0t0  TCP
> raspberrypi:ssh->116.31.116.47:57858 (ESTABLISHED) sshd      1944     
> root    3u  IPv4  17194      0t0  TCP
> raspberrypi:ssh->183.214.141.105:28355 (ESTABLISHED) sshd      1945   
> sshd    3u  IPv4  17194      0t0  TCP
> raspberrypi:ssh->183.214.141.105:28355 (ESTABLISHED)

我已經更改了密碼,重新啟動了我的 Pi 並檢查了任何未知使用者(沒有)。如何繼續使我的 Pi 再次安全?

可能存在也可能不存在安全漏洞。

這可能只是一個試圖暴力破解密碼的白痴。如果他們連接,嘗試密碼,失敗,他們不嘗試另一個或關閉連接,那麼您可以看到這些連接最終將被 sshd 關閉。

/var/log/auth.log

應該有一些關於登錄嘗試的資訊。該last命令可能會顯示您成功登錄。

引用自:https://unix.stackexchange.com/questions/336745