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go-ssh
This project forked from rocktan001/go-ssh
go-ssh
## 2021-12-15 sshd_v2 运行在服务器端,监听62001 端口。 目前遇到问题: 手机端断开转发后,服务端监听端口62001 对应socket 没有及时关闭。测试等待一分钟,变成IN_WAIT1 状态。 ## 2021-12-16 sshd_v2 修改main-timeout 参数,socket 远端断开后 ,server 30内关闭。 tcpConn.SetDeadline(time.Now().Add(*maintimeout)) 30s 内有连接情况,也被断开了。应该是作者设计失误。在确认下。 增加tcpkeepalive 解决了ssh_forward_v2 断开连接后,tcpkeepalive 超时后,断开socket 问题。 新增: ssh_forward_v2 监听的端口,还在继续监听。正常应该close 掉。 新增: keepalive 不知道为什么么会使read 判断出错。 ## 2022-01-10 去掉timeout ,目前测试满足keepalive 时间到,自动断开需求。 1:测试sshd_forward_v2 转发,在网络断开情况下,所有监听的端口(62001)和 已建立连接的端口(62002) ,全部断开。 结果:X . 测试流程: 手机端打开sshd_forward_v2 .电脑端打开vncserver, 同时打开vncviwer。断开手机WiFi。62002 端口会不断发送数据到62001 。keepalive 没有断开。 10:43:06.788998 IP 172.17.0.2.62001 > 112.95.160.227.2261: Flags [P.], seq 0:36, ack 1, win 1399, options [nop,nop,TS val 252377434 ecr 10468460], length 36 keepalive 底层判断有错。 ## 2022-01-11 ssh -i /media/disk2/socks5/.ssh/id_rsa -N -D 0.0.0.0:1080 root@www.rocktan001.com -p 1196 结果: 一:打开google .显示有连接。网页断开后,连接消失。符合要求。后续按这个标准做。 二:curl --proxy socks5h://192.168.199.173:1080 www.google.com 执行完后,连接www.google.com socket 消失。 ## 2022-01-12 #关于tcp 死连接的讨论 https://gmd20.github.io/blog/tcp%E7%9A%84%E6%AD%BB%E8%BF%9E%E6%8E%A5%E6%A3%80%E6%B5%8B-dead-peer-%E9%87%8D%E4%BC%A0%E8%AE%A1%E6%97%B6%E5%99%A8-%E5%90%84%E7%A7%8Dtimeout%E8%B6%85%E6%97%B6%E9%80%89%E9%A1%B9-TCP_USER_TIMEOUT-keepalive-heartbeart%E5%BF%83%E8%B7%B3%E6%9C%BA%E5%88%B6%E7%AD%89/ netstat -natupo 可以查看到timer 信息 # 遇到新问题,不停往socket 写数据,keepalive 超时后会立刻启动自动重写机制。 # 通过往 echo 0 > /proc/sys/net/ipv4/tcp_retries2 可以重写机制失效。 # 注意是IPV4 .l, err = net.Listen("tcp4", *host+":"+*port) ## 2022-01-29 #尝试nps 解决方案。 1:测试网速,使用scp #测试服务器下行,不限制 scp -i ../.ssh/id_rsa -P 1196 ./Keil.STM32F7xx_DFP.2.7.0.zip root@www.rocktan001.com:/root/ #测试服务器上行,可以跑满30Mb/s 带宽 scp -i ../.ssh/id_rsa -P 1196 root@www.rocktan001.com:/root/Keil.STM32F7xx_DFP.2.7.0.zip ./Keil.STM32F7xx_DFP.2.7.0.zip2 2: 测试ssh_forward_v2_openssh 内网穿透 速度 #linux 主机 ./ssh_forward_v2_openssh #windows 主机 scp -P 62003 D://Keil.STM32F7xx_DFP.2.7.0.zip rock@www.rocktan001.com:/home/rock/ scp -P 62003 rock@www.rocktan001.com:/home/rock/Keil.STM32F7xx_DFP.2.7.0.zip ./netspeedtest 结论:go ssh 转发,可以占满带宽 。腾讯服务器配置:CPU 双核 2.5GHZ. 3.8GB 内存
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