我有一台安装了 PF 防火墙 Icefloor 的 Macbook。即使我的电脑处于空闲状态，我也看到大量流量（每秒多个请求）发送到属于 Google 的 IP。我的笔记本电脑上没有任何与 Google 相关的软件，因此我搞不清楚是什么程序在发送这些流量。日志中的内容如下所示（如果无法读取，请见谅）：
00:00:00.210298 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61141 > 74.125.239.46.443: Flags [S], seq 2894619202, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.000022 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61140 > 74.125.239.46.443: Flags [S], seq 1043451854, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.000329 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61142 > 74.125.239.38.443: Flags [S], seq 3844968709, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611114282 ecr 0,sackOK,eol], length 0
00:00:00.000122 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61143 > 74.125.239.38.443: Flags [S], seq 1475886131, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611114282 ecr 0,sackOK,eol], length 0
00:00:01.104061 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61143 > 74.125.239.38.443: Flags [S], seq 1475886131, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611115380 ecr 0,sackOK,eol], length 0
00:00:00.000021 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61142 > 74.125.239.38.443: Flags [S], seq 3844968709, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611115380 ecr 0,sackOK,eol], length 0
00:00:01.104240 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61143 > 74.125.239.38.443: Flags [S], seq 1475886131, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611116479 ecr 0,sackOK,eol], length 0
00:00:00.000012 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61142 > 74.125.239.38.443: Flags [S], seq 3844968709, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611116479 ecr 0,sackOK,eol], length 0
00:00:00.401585 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61144 > 74.125.239.114.80: Flags [S], seq 1846641104, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611116878 ecr 0,sackOK,eol], length 0
00:00:00.200267 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61121 > 74.125.239.115.80: Flags [S], seq 2827866371, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.000028 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61120 > 74.125.239.114.80: Flags [S], seq 494227975, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.000220 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61145 > 74.125.239.115.80: Flags [S], seq 3019819231, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611117078 ecr 0,sackOK,eol], length 0
00:00:00.500626 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61143 > 74.125.239.38.443: Flags [S], seq 1475886131, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611117577 ecr 0,sackOK,eol], length 0
00:00:00.000015 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61142 > 74.125.239.38.443: Flags [S], seq 3844968709, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611117577 ecr 0,sackOK,eol], length 0
00:00:00.401023 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61144 > 74.125.239.114.80: Flags [S], seq 1846641104, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611117977 ecr 0,sackOK,eol], length 0
00:00:00.201283 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61145 > 74.125.239.115.80: Flags [S], seq 3019819231, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611118178 ecr 0,sackOK,eol], length 0
和
00:00:00.000021 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61142 > 74.125.239.38.443: Flags [S], seq 3844968709, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.100267 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61148 > 74.125.239.115.80: Flags [S], seq 3938563181, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611125783 ecr 0,sackOK,eol], length 0
00:00:00.000019 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61147 > 74.125.239.114.80: Flags [S], seq 569830445, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611125783 ecr 0,sackOK,eol], length 0
00:00:01.102604 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61148 > 74.125.239.115.80: Flags [S], seq 3938563181, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611126881 ecr 0,sackOK,eol], length 0
00:00:00.000020 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61147 > 74.125.239.114.80: Flags [S], seq 569830445, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611126881 ecr 0,sackOK,eol], length 0
00:00:01.104752 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61148 > 74.125.239.115.80: Flags [S], seq 3938563181, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611127980 ecr 0,sackOK,eol], length 0
00:00:00.000015 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61147 > 74.125.239.114.80: Flags [S], seq 569830445, win 65535, options [mss 1460,nop,wscale 4,nop,nop,TS val 611127980 ecr 0,sackOK,eol], length 0
00:00:00.200789 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61123 > 74.125.239.114.80: Flags [S], seq 3185633232, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.100509 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61144 > 74.125.239.114.80: Flags [S], seq 1846641104, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.000031 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61125 > 74.125.239.115.80: Flags [S], seq 2940959116, win 65535, options [mss 1460,sackOK,eol], length 0
00:00:00.100484 rule 1.800.icefloor.5/0(match): block out on en0: 69.181.243.26.61145 > 74.125.239.115.80: Flags [S], seq 3019819231, win 65535, options [mss 1460,sackOK,eol], length 0
有人能告诉我是否有办法识别哪个程序将这些流量发送到这些 IP 地址吗？
答案1
有一款名为 Little Snitch（35 美元）的程序，可以让您查看哪些流量来自哪个应用程序，并让您有选择地允许或拒绝流量。它还允许您阻止应用程序的特定服务并创建不同的设置配置文件（即，如果您被绑定到手机，可以快速禁用更新检查和 Spotify）。一次性使用成本高昂，但出奇地有用。
答案2
执行后可以lsof -i -n看到当前连接的列表，前两列显示了进程名和PID。
lsof是一个列出打开的文件和网络套接字的程序。-i代表仅显示网络连接，-n禁用主机解析。
因此，你可以使用它来识别应用程序：
lsof -i -n | grep 74.125.239
如果第一列没有帮助您识别应用程序，您可以获取 PID 并在 中进行搜索ps aux。