ssh转发

概述

linux隧道转发，通过22端口实现端口转发

实践

//client->sshhost->mailhost
ssh -L localport:remotehost:remoteport sshhost    //sshhost 中间左右联通的管道

//client ->sshhost (客户端8080端口转发到sshhost 80)
ssh -L 8080:localhost:80 sshhost

ssh -X  //x11

ssh -Nf -L 2025:mailhost:25 sshhost