使用
proxychains nmap -sV 39.156.66.14
命令时，报错：
[proxychains] config file found: /etc/proxychains.conf
[proxychains] preloading /usr/lib/x86_64-linux-gnu/libproxychains.so.4
[proxychains] DLL init: proxychains-ng 4.14
Starting Nmap 7.91 ( https://nmap.org ) at 2020-11-21 20:09 EST
nmap: netutil.cc:1319: int collect_dnet_interfaces(const intf_entry*, void*): Assertion `rc == 0’ failed.
Aborted
Google之，发现解决方法，proxychains不要启用DNS代理：
vi /etc/proxychains.conf
将
注释。
再次尝试：
proxychains nmap -sV 39.156.66.14
成功：
[proxychains] config file found: /etc/proxychains.conf
[proxychains] preloading /usr/lib/x86_64-linux-gnu/libproxychains.so.4
[proxychains] DLL init: proxychains-ng 4.14
Starting Nmap 7.91 ( https://nmap.org ) at 2020-11-21 20:12 EST
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:80 ... OK
[proxychains] Strict chain ... 127.0.0.1:1089 ... 39.156.66.14:443 ... OK
Nmap scan report for 39.156.66.14
Host is up (0.0071s latency).
Not shown: 998 filtered ports
PORT STATE SERVICE VERSION
80/tcp open http Apache httpd
443/tcp open ssl/http Apache httpd
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 68.31 seconds
参考：https://github.com/rofl0r/proxychains-ng/issues/103