Tim Ng Find the top 10 for the large files in /var
du -a /var | sort -n -r | head -n 10
If below log too large we can clean it without delete
/var/log/audit/audit.log
truncate -s 0 audit.log
Check the cron job last run date
ls -l /var/spool/cron/lastrun/
Maybe root password expired
chage -l root
chage -m 0 -M 99999 root
Clean old password remember
true > /etc/security/opasswwd
SPF
DMARC
_dmarc IN TXT “v=DMARC1;p=quarantine;rua=mailto:rua@abc.com;ruf=mailto:ruf@abc.com”
DKIM
F4EEC778-4C21-11EA-AD84-83DCF040F65E._domainkey IN TXT ( “v=DKIM1; k=rsa; ”
“p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCxICrPoI8+AZ85ney0JRnniswBUCeJSCCmV6eWgxotF7ncQdWLFvNadR5gQiWJi0EHnarsVez6ET+jL9IoHgV6QSyUwBraOKPlU+XzlZVUGUnAn1BdsS6LjdT0anJlu07RiLdgfIJL0zufhEsHVSx3EwWrWL3NQlcLIVi0rCThjwIDAQDB” )
Yahoo
http://help.yahoo.com/l/us/yahoo/mail/postmaster/bulkv2.html
https://support.google.com/mail/contact/msgdelivery?rd=1
grep spam@gmail.com /var/log/mail.log | grep smtpd
su – zimbra
Add
/opt/zimbra/libexec/zmdkimkeyutil -a -d abc.com
List
/opt/zimbra/libexec/zmdkimkeyutil -q -d abc.com
Update
/opt/zimbra/libexec/zmdkimkeyutil -u -d abc.com
Add below DKIM from listed before to bind9
DKIM Public signature:
17123458-4C07-11EA-BD1B-35CF8912347D._domainkey IN TXT ( “v=DKIM1; k=rsa; ”
“p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA9JuDf0kA73baq8Ch1234XY5k0BdRLmup5z5R/UAtsUGwUGoakgeBih8NQNMNd+iepHQqtrI8Eq0SG25oLi5UPl9knoUyq9cqyF/gkku5LiclvIKWTT892qJ/HJxUqOtDWi8pAXV8hkAOhFVdtweQ37w+SqNtF2UvJCI/npQIML86R23+PCErxCIABZP3mEGK8ZsO1m+63VglC8”
“yTSFP7GMLcIUJ6zp5S5ZknwmTc4f/Sa2PVC8H1UR4UhvN2JKr8Dgr3momdKh7NsUu3StLS8bcWQMX8+PPM8UEZTnuOJz6wCAVxtEj1EANBSIKngA/zb1WYU6/p2IRPsg6DAfmFOQIDAQAB” ) ; —– DKIM key 17123458-4C07-11EA-BD1B-35CF8912347D for abc.com
dig +short txt 17123458-4C07-11EA-BD1B-35CF8912347D._domainkey.abc.com @8.8.8.8
[SW1]display poe power-state
[SW1]int g0/0/1
[SW1-GigabitEthernet0/0/1]undo poe enable
[SW1-GigabitEthernet0/0/1]poe enable
0 packages can be updated.
0 updates are security updates.
cat /var/lib/update-notifier/updates-available
Can’t edit agent job
use msdb
go
update dbo.sysjobs set originating_server = ‘CorrectServerName’
Can’t add correct windows users with domain name
because same sid, need to delete old login
conf/server.xml
<Connector
protocol=”org.apache.coyote.http11.Http11NioProtocol”
port=”8443″ maxThreads=”200″
scheme=”https” secure=”true” SSLEnabled=”true”
keystoreFile=”conf/cert/xxx.pfx” keystorePass=”xxx”
keystoreType=”PKCS12″
clientAuth=”false” sslProtocol=”TLS”/>
Gpg4win 3.1.10
https://gpg4win.org/thanks-for-download.html
gpg –generate-key
gpg -a –output C:\MyPublic.asc –export 5F27F353
gpg –import C:\Bank_EN_PUBLIC.asc
gpg –list-keys –keyid-format short
pub rsa2048/5F27F353 2019-10-22 [SC]
7B3022F7A5BD998561D548A1C5C9EB315F27F353
uid [ultimate] MyName abc@123.com
sub rsa2048/EDF8DB07 2019-10-22 [E] [expires: 2021-10-21]
gpg –edit-key EDF8DB07
key 1
expire
0