netcat 缺少 -x 选项

Question

我在使用 nc 命令时遇到问题，无法使用代理，因为没有 -x 选项，而该选项应该存在。

 nc -h
[v1.10-41]
connect to somewhere:   nc [-options] hostname port[s] [ports] ...
listen for inbound:     nc -l -p port [-options] [hostname] [port]
options:
        -c shell commands       as `-e'; use /bin/sh to exec [dangerous!!]
        -e filename             program to exec after connect [dangerous!!]
        -b                      allow broadcasts
        -g gateway              source-routing hop point[s], up to 8
        -G num                  source-routing pointer: 4, 8, 12, ...
        -h                      this cruft
        -i secs                 delay interval for lines sent, ports scanned
        -k                      set keepalive option on socket
        -l                      listen mode, for inbound connects
        -n                      numeric-only IP addresses, no DNS
        -o file                 hex dump of traffic
        -p port                 local port number
        -r                      randomize local and remote ports
        -q secs                 quit after EOF on stdin and delay of secs
        -s addr                 local source address
        -T tos                  set Type Of Service
        -t                      answer TELNET negotiation
        -u                      UDP mode
        -v                      verbose [use twice to be more verbose]
        -w secs                 timeout for connects and final net reads
        -C                      Send CRLF as line-ending
        -z                      zero-I/O mode [used for scanning]
port numbers can be individual or ranges: lo-hi [inclusive];
hyphens in port names must be backslash escaped (e.g. 'ftp\-data').

我的netcat过时了吗？我该如何更新它？感谢帮助。

Answer 1

看起来你有“传统”网络猫( netcat-traditional) 已安装。该-x选项可用于OpenBSD 网络猫( netcat-openbsd)。也可以看看：netcat-traditional 和 netcat-openbsd 之间有什么区别？关于询问 Ubuntu。

Answer 2

netcat 有多种实现，您可能需要 BSD 实现，因为它提供了这一-x选项。在 Ubuntu 中，它可以在netcat-openbsd软件包中找到。