secureCRT通过ssh连接目标服务器报错Connection was reset.

Question

遇到一个ssh的极品问题，头疼啊~大神在哪里~
问题是这样的：
secureCRT通过ssh连接目标服务器报错Connection was reset.
已知是这样的：
1、目标服务器是阿里云的一台虚拟机，linux系统；
2、本地局域网内的其它机器都可以正常ssh连到目标主机(22端口)；
3、本机secureCRT通过ssh连接其它内网里的服务器正常；
4、secureCRT通过ssh连接目标服务器第一个报错Connection was reset. 一直点连接可能会出现Connection closed.报错；然后就两个报错切换；

Answer 1

用nmap扫描正常开放，就是打死连不上ssh，，求助~~

---

Not shown: 997 closed ports

PORT STATE SERVICE VERSION

22/tcp open tcpwrapped

445/tcp filtered microsoft-ds

4444/tcp filtered krb524

Aggressive OS guesses: Linux 2.6.32 - 3.0 (99%), Linux 2.6.32 (97%), Linux 2.6.32 or 3.10 (96%), Linux 2.6.32 - 2.6.39 (95%), Linux 2.6.38 (94%), Linux 3.2 - 3.8 (93%), Linux 2.6.39 (92%), Linux 3.4 (92%), WatchGuard Fireware 11.8 (92%), Linux 3.0 (92%)

No exact OS matches for host (test conditions non-ideal).

Uptime guess: 6.456 days (since Wed Aug 31 08:56:23 2016)

Network Distance: 16 hops

TCP Sequence Prediction: Difficulty=262 (Good luck!)

IP ID Sequence Generation: All zeros