I was having problems with receiving emails from multiple ip addresses – but all of them being addressed from the same set of email addresses. In Zimbra this can be addressed using zimbraMtaSmtpdSenderRestrictions and setting up a file with a … Continue reading →
From a command line prompt: systeminfo | find /i “install date”
Continue reading →for /L %%A in (15,1,254) DO ( dnscmd /recordadd 6.9.10.in-addr.arpa %%A PTR office.seei.biz )
Continue reading →I have found the following two sites helpful in finding issues with the configuration of SSL secured web sites https://ssltools.digicert.com/checker/ https://www.ssllabs.com/ssltest/analyze.html Test which ciphers (TLS, SSL, etc) are enabled nmap -sV –script ssl-enum-ciphers -p 443 www.yourdomain.com Ref: https://nmap.org/nsedoc/scripts/ssl-enum-ciphers.html
Continue reading →The domain controller of a domain should be set to a reliable time source. All machines in the domain will get the current time from the domain controller. To correct this: Determine which machine is the PDC with the command: … Continue reading →