paulooi.com

One of our mailserver having problem last week. It’s caused by the massive connections connected into the server sending out newsletter(large database unstoppable loops) from one host.

2006-06-15 08:50:06 Connection from [201.xx.xx.xx] refused: too many connections
2006-06-15 08:50:20 Connection from [201.xx.xx.xx] refused: too many connections
2006-06-15 08:50:24 Connection from [201.xx.xx.xx] refused: too many connections
2006-06-15 08:50:28 Connection from [201.xx.xx.xx] refused: too many connections
2006-06-15 08:50:32 Connection from [201.xx.xx.xx] refused: too many connections

Exim default allow maximum 20 connections from a host. You can increase the connection in the main configuration file by adding in this line;

smtp_accept_max = 50

For more information, visit Exim’s documentation site.

I have configured pure-ftpd using FreeBSD ports(usually compiled from source). After everything have setup, postgresql, db, table, users and etc, it seem like cannot connect into the server with the below message…

Dec 19 16:34:14 server pure-ftpd: (?@60.48.150.26) [WARNING] Can’t login as [takizo]: account disabled

After few hours of checking, I found the cause of the problem is the UID and GID I set was low than 1000, if you have the similar problem, try to set a higer UID and GID. Better in the range of 5000(my own opinion).

All the best