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How we efficiently enable port 587 postfix?
Enabling port 587 in Postfix is really easy. Port 587 ensures the security of the emails while sending them. Therefore, it reduces the rejected emails on the server. At Bobcares, we receive requests to enable the ports on postfix and fix its errors as a part of our...
509 bandwidth limit exceeded – Possible ways to avoid it
Is your website showing 509 bandwidth limit exceeded message? It just indicates that your website traffic is too high that the host cannot allow. This too has a simple fix, free up some bandwidth always. Usually, we do this by upgrading the hosting plan, reduce file...
IPTables NAT Masquerade – How we do it?
Ever wondered how private networks can share a single public IP without breaking a sweat? Enter iptables NAT masquerade, a powerful tool that makes this possible. Essentially, it functions as a router, cleverly hiding the access of private networks while sharing a...
Postfix error mail transport unavailable – How we figured it out
There are lots of undelivered outgoing emails in my server and I see an error message as Postfix error mail transport unavailable! . What I need to do? One of the typical postfix errors which creates a problem for many of our customers. Mail transport unavailable...
Fail2ban ignoreip – Easy way to whitelist trusted IPs
Fail2ban ignoreip is a default feature to whitelist trusted IPs. Usually, fail2ban bans IPs that are suspicious while monitoring logs. But if the user wants to whitelist a trusted IP, we edit ignoreip in the conf file. At Bobcares, we use fail2ban to whitelist IPs, as...
Fail2ban blacklist IP – Easy way to do it!!
Have you ever wondered how fail2ban blacklist IP? Fail2ban protects our server mainly from brute-force attacks. It bans suspicious IP addresses in the server firewall. At Bobcares, we often receive requests to blacklist IP addresses as part of our Server Management...
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Quick fix for SMTP Error (-1) : Connection to server failed
SMTP Error (-1): Connection to server failed. That was an error message our customer recently got while trying to send mails via Roundcube. Usually, this error occurs due to firewall restrictions, mail server malfunctioning, and so on. At Bobcares, we often get...
MySQL error 1215 -Top causes and fixes!
Databases operations like backup or restore often result in annoying errors. Usually, MySQL error 1215 pops up while creating a foreign key or constraints in the database table. There are many reasons for this error to occur which include in-appropriate quotes in the...
Rdesktop failed to open display – Quick Fix
Do you need to work on Windows Server when you are much of a Linux guy ?? The rdesktop utility is useful to configure services in a windows server from a Linux system. However, it often fails with error "Rdesktop failed to open display". We troubleshoot rdesktop...
Rsync error code 11 – How we fix it?
Did your daily backup ended up with Rsync error code 11? The error code description says it's an error with the file I/O. Basically, rsync error 11 occurs when the disk space is full or if the system cannot detect the external drive. At Bobcares, we often get requests...
Best way to fix – InnoDB memory heap is disabled
InnoDB works as a better option when dealing with large databases. However, often misconfiguration in the InnoDB settings results in errors. Older MySQL versions report error "InnoDB memory heap is disabled" when the InnoDB uses System memory. At Bobcares, we receive...
SMTP error 452 – Top 4 tried and tested fixes
Are you getting SMTP error 452 when sending mails? The 452 too many recipients error mainly happens due to message overload. When we try to send too many emails at once, the server storage limit exceeds and results in this error. At Bobcares, we often receive requests...
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