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The error "All TAP-Windows adapters on this system are currently in use" suggests that there is a problem with the virtual Tun/Tap network adapter used by OpenVPN on Windows. To solve the issue, you need to re-enable the adapter or reinstall the driver. Solution 1: re-enable the adapter Open Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings. Check descri..

In this article, we will show how to remove old/unused kernel images on RHEL/CentOS/Fedora systems. However, before you remove an old kernel, it is important to keep your kernel up to date; install the latest version in order to leverage new kernel functions and to protect your system from vulnerabilities that have been discovered in older versions.To install or upgrade to latest kernel version ..

Quickstartepel-release-latest-6epel-release-latest-7Package-x-generic-16.pngepel-release-latest-6Package-x-generic-16.pngepel-release-latest-7 You may retrieve signed binary configuration files from one the above two links (varying by the major release number of the installation target machine). They may be automatically installed by root thus:RHEL/CentOS 6: # yum install https://dl.fedoraprojec..

OpenSSL Convert PEMConvert PEM to DERopenssl x509 -outform der -in certificate.pem -out certificate.derConvert PEM to P7Bopenssl crl2pkcs7 -nocrl -certfile certificate.cer -out certificate.p7b -certfile CACert.cerConvert PEM to PFXopenssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crtOpenSSL Convert DERConvert DER to PEM openssl x509 -inform de..

비밀키를 (암호사용) 생성한다. openssl genrsa -aes256 -out entrust.kr.key.enc 2048 비밀키에서 암호를 제거한다. openssl rsa -in entrust.kr.key.enc -out entrust.kr.key CSR 생성을 위한 conf 파일을 만든다. vi entrust.kr.conf [ req ]default_bits = 2048default_md = sha1default_keyfile = entrust.kr.keydistinguished_name = req_distinguished_nameextensions = v3_user ## 인증서 요청시에도 extension 이 들어가면 authorityKeyIdentifier 를 찾지 못해 에러가 나므로 막아둔다...

sudo -u postgres psql postgres # \password postgres Enter new password:

keytool -importkeystore -srckeystore keystore \ -srcstoretype JKS \ -destkeystore keystore.p12 \ -deststoretype PKCS12 openssl pkcs12 -in keystore.p12 -clcerts -nokeys -out servercert.pemumask 0077openssl pkcs12 -in keystore.p12 -nocerts -nodes -out serverkey.pemumask 0022

The error "All TAP-Windows adapters on this system are currently in use" suggests that there is a problem with the virtual Tun/Tap network adapter used by OpenVPN on Windows. To solve the issue, you need to re-enable the adapter or reinstall the driver. Solution 1: re-enable the adapter Open Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings. Check descri..

원문 : http://dgoh.tistory.com/126개요OpenVPN 기본 설정을 사용해 TCP VPN 터널링(Site-To-Site) 구축 후, 파일전송을 해보면 속도가 지나치게 느린 경우가 생긴다. 자세한 설명은 이 블로그를 참고하면 된다. 요약하면 windows size가 너무 작아 이 부분 설정이 필요하다.설정 1. window size 조절서버와 클라이언트 양 쪽에 해당 설정을 추가하고 연결을 맺는다. 클라이언트 설정을 강제하지 않으려면 push로 시작하는 설정을 삭제해도된다.sndbuf 0 rcvbuf 0 push "sndbuf 393216" push "rcvbuf 393216"설정 2. comp-lzo 삭제comp-lzo가 설정 돼있으면 CPU 사용량이 늘어나면서 속도가 느려질 수 있으..

$ yum install epel-release -y$ yum -y install xrdp tigervnc-server $ systemctl start xrdp.service$ netstat -antup | grep xrdp # xrdp 가 동작하는지 확인 $ systemctl enable xrdp.service # 방화벽$ firewall-cmd --permanent --zone=public --add-port=3389/tcp$ firewall-cmd --reload