The xmanagerpassive function cannot be used. the firewall was changed over the weekend. The previously available xmangerpassive function cannot be used normally. it was initially suspected that it was caused by the firewall adjustment. But which firewall port is used? 1. usage. After logging on to the host through ssh, [root @ dtydb5... the xmanager passive function cannot be used. the firewall was changed over the weekend. The previously available xmanger passive function cannot be used normally. it is initially suspected that it was caused by the firewall adjustment. But which firewall port is used?
1. usage. After logging on to the host through ssh, [root @ dtydb5 ~] # Export DISPLAY = 10.6.90.41: 0.0 [root @ dtydb5 ~] # Xclock www.2cto.com Error: Can't open display: 10.6.90.41: 0.0
2. capture packets on the host. the X11 port on the client cannot communicate with tcpdump-I bond0 host 10.6.90.41 14:34:10. 331583 IP dtydb5.12854> 10.6.90.41.x11: S 782296038: 782296038 (0) win 5840 14:34:16. 331562 IP dtydb5.12854> 10.6.90.41.x11: S 782296038: 782296038 (0) win 5840 14:34:28. 331564 IP dtydb5.12854> 10.6.90.41.x11: S 782296038: 782296038 (0) win 5840 14:34:52. 331601 IP dtydb5.12854> 10.6.90.41.x11: S 782296038: 782296038 (0) win 5840 14:35:40. 332611 IP dtydb5.12854> 10.6.90.41.x11: S 782296038: 782296038 (0) win 5840 Www.2cto.com 3. the client uses wireshark to capture packets and confirms that the client has not received the packets. This indicates that the package is blocked by the firewall 4. use the 360 firewall function to check whether the xmanger software is listening on port 6000.
5. online search, 6000 is indeed the default port 6000/tcp X11-used between an X client and server over the network official 6001/udp X11-used between an X client and server over the network official website summary: this indicates that the xmanger passive function is used. in addition to using port 22 of ssh, communication between the server and Port 6000 of the client is also required. The author hijk139
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