配置代理时，远程支持通道命令失败
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适用于
- NetApp Element 软件 11.0 及更高版本
问题
在某些情况下，远程支持隧道命令在如下配置代理时失败；
# rst -r sfsupport.solidfire.com -u element -p 1234
<DATE TIME> socat[25178] E PROXY: 3 parameters required
ssh_exchange_identification: Connection closed by remote host