Establish DNS Cluster

[nion]

I have two servers, both running cPanel + WHM. One is CentOS, the other RedHat Enterprise.

For reference, the CentOS server is called "seabrook" and the RH is called "skywarp".

I'm trying to enable the DNS cluster so that records can be syncronized between the two servers. skywarp is a fresh install.

I've managed to successfully link skywarp TO seabrook, but when attempting to establish the relationship FROM seabrook to skywarp, I receive the following error:

There was an error while processing your request: Cpanel::Accounting returned [HTTP/1.0 900 NET OR SSL ERROR ./cgi/trustclustermaster.cgi 29141: open_tcp_connection: failed `74.52.21.2', 2087 (Connection timed out) ]

Any ideas as to what may cause this or a fix?

Thanks.

[rhenderson]

I have two servers, both running cPanel + WHM. One is CentOS, the other RedHat Enterprise.

For reference, the CentOS server is called "seabrook" and the RH is called "skywarp".

I'm trying to enable the DNS cluster so that records can be syncronized between the two servers. skywarp is a fresh install.

I've managed to successfully link skywarp TO seabrook, but when attempting to establish the relationship FROM seabrook to skywarp, I receive the following error:

There was an error while processing your request: Cpanel::Accounting returned [HTTP/1.0 900 NET OR SSL ERROR ./cgi/trustclustermaster.cgi 29141: open_tcp_connection: failed `74.52.21.2', 2087 (Connection timed out) ]

Any ideas as to what may cause this or a fix?

Thanks.

ssh to seabrook and type in telnet skywarp 2087 and see what happens, conversely ssh to skywarp and type telnet seabrook 2087 which ever one doesn't work, at least your closer to seeing that a port might be blocked. Do you have a firewall? My guess is port 2087 is not added in both outbound and inbound ports on the one or both of the servers.

[nion]

ssh to seabrook and type in telnet skywarp 2087 and see what happens, conversely ssh to skywarp and type telnet seabrook 2087 which ever one doesn't work, at least your closer to seeing that a port might be blocked. Do you have a firewall? My guess is port 2087 is not added in both outbound and inbound ports on the one or both of the servers.

telnet from skywarp TO seabrook:
root@skywarp [~]# telnet seabrook.visfx.net 2087
Trying 209.59.174.88...
Connected to seabrook.visfx.net (209.59.174.88).
Escape character is '^]'.

telnet from seabrook TO skywarp:
root@seabrook [~]# telnet 74.52.21.2 2087
Trying 74.52.21.2...

root@seabrook [~]#

---

This leads me to believe skywarp has port 2087 blocked.

[rhenderson]

telnet from skywarp TO seabrook:
root@skywarp [~]# telnet seabrook.visfx.net 2087
Trying 209.59.174.88...
Connected to seabrook.visfx.net (209.59.174.88).
Escape character is '^]'.

telnet from seabrook TO skywarp:
root@seabrook [~]# telnet 74.52.21.2 2087
Trying 74.52.21.2...

root@seabrook [~]#

---

This leads me to believe skywarp has port 2087 blocked.

Thats 1 possibility that skywarp has port 2087 inbound blocked, but don't forget seabrook could have the outbound port 2087 blocked as well.

[Adrnalnrsh]

Thats 1 possibility that skywarp has port 2087 inbound blocked, but don't forget seabrook could have the outbound port 2087 blocked as well.

Ditto, most tutorials on setting up APF (if you use it) dont mention opening 2087 outbound. I can say I had this same issue.