Hi All,
I have a remote office I help to look after in Papua New Guinea. Their ISP has informed them that their bandwidth useage has jumped from 212Mb to 12.5Gb. A fairly sure sign of open relay I think.
I have followed a lot of the suggestions on this forum for securing sendmail but I still dont seem to have locked it down completely.
The maillog shows a few of these entries:
May 28 12:00:05 mail sendmail[29306]: NOQUEUE: [61.144.49.121] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
What does this mean? Is this a spammer by-passing my rules and still using our server to relay or is it nothing to worry about?
Would appreciate any help or advice
BTW: Machine is Redhat 6.2 with sendmail-8.11.6-1.62.3 from redhats site.
Ben
I have a remote office I help to look after in Papua New Guinea. Their ISP has informed them that their bandwidth useage has jumped from 212Mb to 12.5Gb. A fairly sure sign of open relay I think.
I have followed a lot of the suggestions on this forum for securing sendmail but I still dont seem to have locked it down completely.
The maillog shows a few of these entries:
May 28 12:00:05 mail sendmail[29306]: NOQUEUE: [61.144.49.121] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
What does this mean? Is this a spammer by-passing my rules and still using our server to relay or is it nothing to worry about?
Would appreciate any help or advice
BTW: Machine is Redhat 6.2 with sendmail-8.11.6-1.62.3 from redhats site.
Ben