The gizmore conspiracy
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The gizmore conspiracy
May 22, 2015 - 04:14:03 (11y 164d)
May 22, 2015 - 04:14:03 (11y 164d)
Probably a few people figured something happened to myself and the servers i "maintain".
Indeed, a lot happened, and finally i checked one weird thing that puzzled me.
I was not able to send emails via this smtpd anymore.
My first thought, in my crazy times, was... that some evil "Man In The Middle" drops my packets when i send out the mails... and it looks like i was right!
I did not change any configs on client or server when it stopped working.
Some servers, like gmx or yahoo still work.
Today i checked mail logs and saw that no traffic passes through.
I disabled firewall => still no connect
Tried from a different box/vps => works!
Changed submission port from 587 to 588 => works also from home! WTF
It really looks like someone thinks i am not allowed to send mails from my own mailservers anymore
Also port 25 and 465 are blocked to my own vps.
The telnet just hangs waiting for connection.
When i now try the closed 587 => telnet still hangs
When i try a closed port like 12233 => telnet immediately quits
Am i missing something in my conspiracy theory?
Happy Challenging!
gizmore
Indeed, a lot happened, and finally i checked one weird thing that puzzled me.
I was not able to send emails via this smtpd anymore.
My first thought, in my crazy times, was... that some evil "Man In The Middle" drops my packets when i send out the mails... and it looks like i was right!
I did not change any configs on client or server when it stopped working.
Some servers, like gmx or yahoo still work.
Today i checked mail logs and saw that no traffic passes through.
I disabled firewall => still no connect
Tried from a different box/vps => works!
Changed submission port from 587 to 588 => works also from home! WTF
It really looks like someone thinks i am not allowed to send mails from my own mailservers anymore
Also port 25 and 465 are blocked to my own vps.
The telnet just hangs waiting for connection.
When i now try the closed 587 => telnet still hangs
When i try a closed port like 12233 => telnet immediately quits
Am i missing something in my conspiracy theory?
Happy Challenging!
gizmore
The geeks shall inherit the properties and methods of object earth.
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RE: The gizmore conspiracy
May 22, 2015 - 05:07:11 (11y 164d)
May 22, 2015 - 05:07:11 (11y 164d)
So what you are saying is that some ports are blocked when you try to connect from home to the server.
What do you mean with "Some servers, like gmx or yahoo still work."? This suggest that there are more servers that it doesn't work for.
"I disabled firewall" On PC? Router? Server?
Have you tried traceroute to compare 587 to 588? If everyone plays along, it should make clear where the packets are dropped.
What do you mean with "Some servers, like gmx or yahoo still work."? This suggest that there are more servers that it doesn't work for.
"I disabled firewall" On PC? Router? Server?
Have you tried traceroute to compare 587 to 588? If everyone plays along, it should make clear where the packets are dropped.
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RE: The gizmore conspiracy
May 23, 2015 - 11:02:57 (11y 163d)
May 23, 2015 - 11:02:57 (11y 163d)
A traceroute works fine on both ports, so i suppose only tcp/ip is blocked.
Affected are only my own mailservers, so there seems to be a special rule for just these connections.
Affected are only my own mailservers, so there seems to be a special rule for just these connections.
The geeks shall inherit the properties and methods of object earth.
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RE: The gizmore conspiracy
May 23, 2015 - 16:44:23 (11y 163d)
May 23, 2015 - 16:44:23 (11y 163d)
Make sure you use TCP for traceroute (default is probably UDP); if traceroute works fine, so should normal connections.
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RE: The gizmore conspiracy
May 23, 2015 - 18:58:24 (11y 163d)
May 23, 2015 - 18:58:24 (11y 163d)
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