On Wed, May 14, 2025 at 11:23 PM 吴山 <shan...@zstack.io> wrote: > > After executing the nc command twice, executing the nc command again timed > out, and the netstat command showed that the server did not close the > socket connection： > > [root@172-26-51-207 ~]# systemctl status usbredir-4100-003-002.service > ● usbredir-4100-003-002.service - /sbin/usbredirserver -p 4100 003-002 > Loaded: loaded (/run/systemd/transient/usbredir-4100-003-002.service; > transi> > Transient: yes > Active: active (running) since Tue 2025-05-13 14:13:41 CST; 12min ago > Main PID: 3864277 (usbredirserver) > Tasks: 2 (limit: 101063) > Memory: 608.0K > CGroup: /system.slice/usbredir-4100-003-002.service > └─3864277 /sbin/usbredirserver -p 4100 003-002 > 5月 13 14:13:41 172-26-51-207 systemd[1]: Started /sbin/usbredirserver -p > 4100 > > 5月 13 14:13:45 172-26-51-207 usbredirserver[3864277]: usbredirparser: Peer > ver> > > [root@172-26-51-207 ~]# rpm -qa | grep usb > qemu-kvm-hw-usbredir-6.2.0-232.g09252161d1.el8.x86_64 > usbredir-0.12.0-2.el8.x86_64 > libusbx-1.0.23-4.el8.x86_64 > usbutils-010-3.el8.x86_64 > usbredir-server-0.12.0-2.el8.x86_64 > libgusb-0.3.0-1.el8.x86_64 > [root@172-26-51-207 ~]# nc -zv 172.26.51.207 4100 > Ncat: Version 7.70 ( https://nmap.org/ncat ) > Ncat: Connected to 172.26.51.207:4100. > Ncat: 0 bytes sent, 0 bytes received in 0.01 seconds. > [root@172-26-51-207 ~]# netstat -nap | grep 4100 > tcp 0 0 172.26.51.207:47988 172.26.51.207:4100 > FIN_WAIT2 - > tcp6 1 0 :::4100 :::* > LISTEN 3864277/usbredirser > tcp6 1 0 172.26.51.207:4100 172.26.51.207:47988 > CLOSE_WAIT - > tcp6 0 0 172.26.51.207:4100 172.26.51.230:58576 > ESTABLISHED 3864277/usbredirser > [root@172-26-51-207 ~]# nc -zv 172.26.51.207 4100 > Ncat: Version 7.70 ( https://nmap.org/ncat ) > Ncat: Connected to 172.26.51.207:4100. > Ncat: 0 bytes sent, 0 bytes received in 0.01 seconds. > [root@172-26-51-207 ~]# netstat -nap | grep 4100 > tcp 0 0 172.26.51.207:47988 172.26.51.207:4100 > FIN_WAIT2 - > tcp 0 0 172.26.51.207:33384 172.26.51.207:4100 > FIN_WAIT2 - > tcp6 2 0 :::4100 :::* > LISTEN 3864277/usbredirser > tcp6 1 0 172.26.51.207:4100 172.26.51.207:33384 > CLOSE_WAIT - > tcp6 1 0 172.26.51.207:4100 172.26.51.207:47988 > CLOSE_WAIT - > tcp6 0 0 172.26.51.207:4100 172.26.51.230:58576 > ESTABLISHED 3864277/usbredirser > [root@172-26-51-207 ~]# nc -zv 172.26.51.207 4100 > Ncat: Version 7.70 ( https://nmap.org/ncat ) > Ncat: Connection timed out. > > It looks like you are testing from the same host but you already have a connection from a remote host. This should not happen if you don't already have external connections.
> 此信件包含保密信息，请收件人予以保密，未经许可，请勿向第三人披露，谢谢。 > > This letter contains confidential information which is requested to be kept > confidential by the recipient and shall not be disclosed to any third party > without permission. Thank you. > > Do you realize that if this is true you are violating corporate policies, right? Frediano
