- 论坛徽章:
- 1
|
交换机上出现了这种现象, 配置了telnet后,PC机能够ping通设备, 但是telnet确连接不上, 提示连接不上主机, 23口连接失败。
然后在交换机上进入linux 查看ps 发现没有telnetd服务进程起来。/etc/xinetd.d/telnet 内容是空的
通过tcpdump发现只有这些报文收到, 应该是tcp握手没有成功
16:22:16.632679 IP 192.168.215.1.1789 > 192.168.215.162.telnet: S 4113480327:4113480327(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK>
16:22:16.632765 IP 192.168.215.162.telnet > 192.168.215.1.1789: R 0:0(0) ack 4113480328 win 0
16:22:17.132311 IP 192.168.215.1.1789 > 192.168.215.162.telnet: S 4113480327:4113480327(0) win 8192 <mss 1460,nop,wscale 2,nop,nop,sackOK>
16:22:17.132384 IP 192.168.215.162.telnet > 192.168.215.1.1789: R 0:0(0) ack 1 win 0
16:22:17.632344 IP 192.168.215.1.1789 > 192.168.215.162.telnet: S 4113480327:4113480327(0) win 8192 <mss 1460,nop,nop,sackOK>
16:22:17.632429 IP 192.168.215.162.telnet > 192.168.215.1.1789: R 0:0(0) ack 1 win 0
16:22:21.168694 arp who-has 192.168.215.162 (00:e0:ec:25:33:71 (oui Unknown)) tell 192.168.215.1
16:22:21.168715 arp reply 192.168.215.162 is-at 00:e0:ec:25:33:71 (oui Unknown)
有遇到过这样的情况不? {:3_191:} |
|