Dear Alan, Thanks for your kindly remind. However, we need use EAP AKA authentication, but 3.X version don't support it, so I choose the master branch, I download the code in 2021/9/16. About the error from libkqueue, actually when I executed the configure command, it shows I need to install libkqueue first, but when I try to install libkqueue, it shows I need to install rpmlib(SetVersion) first, but I can't find the rpmlib(SetVersion) package in the internet. So I install the libkqueue 2.0.1 devel without rpmlib(SetVersion) by rpm -i --force --nodeps, I think this is the true cause. How can I find the rpmlib(SetVersion) package or code? could you help me, thank you very much. The installation info like this: [root@localhost ~]# rpm -qa|grep libkqueue libkqueue-2.0.1-alt5.x86_64 libkqueue-devel-2.0.1-alt5.x86_64 [root@localhost ~]# rpm -qa|grep rpmlib kobo-rpmlib-0.6.0-2.el7.noarch ------------------ 原始邮件 ------------------ 发件人: "Alan DeKok" <aland@deployingradius.com>; 发送时间: 2021年9月17日(星期五) 晚上7:47 收件人: "FreeRadius users mailing list"<freeradius-users@lists.freeradius.org>; 抄送: "老咪"<93327349@qq.com>; 主题: Re: The problem when I run freeRadius server 4.0 in master: Failed adding new socket to network event loop: Failed inserting filters for FD 15: EFAULT: Bad address On Sep 17, 2021, at 5:46 AM, 老咪 via Freeradius-Users <freeradius-users@lists.freeradius.org> wrote: > I download the newest code in github, master branch.After I fixed some small bugs, run the freeRadius server 4.0 by radiusd -X > It show like this: We don't recommend that people run the "master" branch. It's still alpha, and hasn't had an official release. It may or may not work, depending on the day. > ... ... > Scheduler created in single-threaded mode > #### Opening listener interfaces #### > Ready to process requests > Network - Failed adding new socket to network event loop: Failed inserting filters for FD 15: EFAULT: Bad address > Network - Failed adding new socket to network event loop: Failed inserting filters for FD 16: EFAULT: Bad address > Network - Failed adding new socket to network event loop: Failed inserting filters for FD 17: EFAULT: Bad address > Network - Failed adding new socket to network event loop: Failed inserting filters for FD 18: EFAULT: Bad address That's an error from libkeueue. You're probably running a very old version, because that's what most distributions ship. We've put a lot of fixes into libkqueue, and the latest version from GitHub should work a lot better. Alan DeKok.