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由于客户端传入连接过多、无法通过SSH访问集群

由于客户端传入连接过多、无法通过SSH访问集群

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Category:: ontap-9

Specialty:: core<a>SSH</a><a>2009120先处理过多的</a><a>传入连接连接</a><a>已被远程主机关闭</a><a>以进行转换</a>

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适用场景

ONTAP 9
SSH

问题描述

无法通过SSH访问集群管理或节点管理、并出现以下错误

# ssh -vvv admin@clustermgmt.local

OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: /etc/ssh/ssh_config line 62: Applying options for *

debug1: Executing proxy command: exec /usr/bin/sss_ssh_knownhostsproxy -p 22 clustermgmt.local

debug1: permanently_set_uid: 0/0

debug1: permanently_drop_suid: 0

debug1: identity file /root/.ssh/id_rsa type 1

debug1: key_load_public: No such file or directory

debug1: identity file /root/.ssh/id_rsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /root/.ssh/id_dsa type -1

debug1: key_load_public: No such file or directory

debug1: identity file /root/.ssh/id_dsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /root/.ssh/id_ecdsa type -1

debug1: key_load_public: No such file or directory

debug1: identity file /root/.ssh/id_ecdsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /root/.ssh/id_ed25519 type -1

debug1: key_load_public: No such file or directory

debug1: identity file /root/.ssh/id_ed25519-cert type -1

debug1: Enabling compatibility mode for protocol 2.0

debug1: Local version string SSH-2.0-OpenSSH_7.4

ssh_exchange_identification: Connection closed by remote host

存储审核日志显示连接尝试次数过多、从而导致SSH服务停用

0000001c.000068ae 00002423 Sun Apr 03 2022 08:17:51 +03:00 [daemon:error] 1 2022-04-03T08:17:51.341021+03:00 node-01 xinetd 6704 - - Deactivating service ssh due to excessive incoming connections. Restarting in 60 seconds.

0000001c.000068fd 0000278c Sun Apr 03 2022 08:19:17 +03:00 [daemon:error] 1 2022-04-03T08:19:17.765067+03:00 node-01 xinetd 6704 - - Deactivating service ssh due to excessive incoming connections. Restarting in 60 seconds.

ifstat 显示SSH端口22未处于侦听状态

---- ANYVSERVER IPSpace ----

Active Internet connections (including servers)

Proto Recv-Q Send-Q Rexmit OOORcv 0-win Local Address Foreign Address (state) VCTX Services Used-CG Req-CG Hash CG-Row CG-Col CG-Class Weight Bytes_Sent Bytes_Rcvd Rwind Swind Cong-win(bytes) Cong-win-thresh(bytes) MSS(bytes) Cong-algo ECN

tcp4 0 0 0 0 0 *.22 *.* CLOSED ANY 0x01FFFE7E ------- ------ 0 0 0 ---------------- 0 0 0 0 0 1073725440 1073725440 1220 cubic N/A

tcp4 0 0 0 0 0 *.22 *.* CLOSED ANY 0x01FFFE7E ------- ------ 0 0 0 ---------------- 0 0 0 0 0 1073725440 1073725440 1220 cubic N/A

tcp4 0 0 0 0 0 *.22 *.* CLOSED ANY 0x01FFFE7E ------- ------ 0 0 0 ---------------- 0 0 0 0 0 1073725440 1073725440 1220 cubic N/A

tcp4 0 0 0 0 0 *.22 *.* CLOSED ANY 0x01FFFE7E ------- ------ 0 0 0 ---------------- 0 0 0 0 0 1073725440 1073725440 1220 cubic N/A