dovecot rejecting connects
I am a newbie to dovecot but not postfix and centos
I created a new VM with Centos 8 and installed dovecot and postfix. Postfix is working fine but dovecot rejects connections from anything but the local machine.
Locally
Trying 10.10.100.157... Connected to 10.10.100.157. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN] Dovecot ready.
Machine on same subnet. Windows, Linux, etc. Doesn't seem to matter
telnet 10.10.100.157 143 Connecting To 10.10.100.157... Could not open connection to the host, on port 143: Connect failed
I made sure the iptables are empty so it doesn't seem to be a firewall issue
I put some LOG statements in the iptables and it showed the connect packet arriving and the response packet was ICMP type 3 code 13.
Any ideas?
Roy
Hi all!
On Fri, 2019-12-20 at 17:39 -0700, Roy wrote: [...]
I created a new VM with Centos 8 and installed dovecot and postfix.
Postfix is working fine but dovecot rejects connections from anything but the local machine.Locally
Trying 10.10.100.157... Connected to 10.10.100.157. Escape character is '^]'.
- OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN] Dovecot ready.
Machine on same subnet. Windows, Linux, etc. Doesn't seem to matter
telnet 10.10.100.157 143 Connecting To 10.10.100.157... Could not open connection to the host, on port 143: Connect failed
I made sure the iptables are empty so it doesn't seem to be a firewall issue
In the host or the VM? Is teh VM switchted or routed with the LAN interface?
I put some LOG statements in the iptables and it showed the connect packet arriving and the response packet was ICMP type 3 code 13.
Which make it pretty clear that it has nothing to do with dovecot as such as that's aresponse from the TCP/IP-stack ...
Any ideas?
Duckduckgo-ing "icmp 3 13" delivers as the 1st link http://www.networksorcery.com/enp/protocol/icmp/msg3.htm and 13 seem to indicate "Communication Administratively Prohibited."
Your turn;-)
MfG, Bernd
Bernd Petrovitsch Email : bernd@petrovitsch.priv.at LUGA : http://www.luga.at
On 12/21/19 2:50 AM, Bernd Petrovitsch wrote:
Hi all!
On Fri, 2019-12-20 at 17:39 -0700, Roy wrote: [...]
I created a new VM with Centos 8 and installed dovecot and postfix. Postfix is working fine but dovecot rejects connections from anything but the local machine.
Locally
Trying 10.10.100.157... Connected to 10.10.100.157. Escape character is '^]'. * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLEIDLE STARTTLS AUTH=PLAIN] Dovecot ready.
Machine on same subnet. Windows, Linux, etc. Doesn't seem to matter
telnet 10.10.100.157 143 Connecting To 10.10.100.157... Could not open connection to the host, on port 143: Connect failedI made sure the iptables are empty so it doesn't seem to be a firewall issue In the host or the VM? Is teh VM switchted or routed with the LAN interface?
I put some LOG statements in the iptables and it showed the connect packet arriving and the response packet was ICMP type 3 code 13. Which make it pretty clear that it has nothing to do with dovecot as such as that's aresponse from the TCP/IP-stack ...
Any ideas? Duckduckgo-ing "icmp 3 13" delivers as the 1st link http://www.networksorcery.com/enp/protocol/icmp/msg3.htm and 13 seem to indicate "Communication Administratively Prohibited."
Your turn;-)
MfG, Bernd
CentOS 8 use nftables instead of iptables so first of all try firewall-cmd --list-services
On 12/20/2019 10:51 PM, MIhai Badici wrote:
...
CentOS 8 use nftables instead of iptables so first of all try firewall-cmd --list-services
That was it. I assumed that the firewall was disabled because iptables was empty. The firewall was using nftables.
Once I disabled the firewall, things started working.
Thanks for your help!
Roy
participants (3)
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Bernd Petrovitsch
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MIhai Badici
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Roy