how does server communication work

Discussion in 'General' started by muekno, Jan 7, 2014.

  1. muekno

    muekno Member HowtoForge Supporter

    Hi, found a thread about this by searching other things, but cannot refind.
    The manual (cost me 5 EUR) ist helpfull at all but does not discribe these things.

    Communcation in the internal net beeween servers work. Between servers over the internet I have some propblems, updates seems not to go through.

    So I like a little more details about.
    Ports to open in firewall?
    Secure communication via ssl or vpn, what's better (more secure), easyer?

    Thanks a lot for any information or link

    Rainer :)
     
  2. till

    till Super Moderator Staff Member ISPConfig Developer

    In a multiserver setup, the slaves are connection to the master mysql server and pull the changes from there. So the mysql tcp port has to be open in the firewall of the master server and mysql on the master server has to listen on the external network interface.
     
  3. muekno

    muekno Member HowtoForge Supporter

    it works, but stiil how to secure

    the secure the communication ist best

    Rainer
     
  4. muekno

    muekno Member HowtoForge Supporter

    Additional question Monitor

    In Ispconfig Monitor I can see the System Log etc. from every server. They cannot be transferd by polling slave from master, so ther must be still another way
     
  5. till

    till Super Moderator Staff Member ISPConfig Developer

    There is no other way. The slave connects to the master, like I explained above. A mysql connection is bi directional, so you can pull changes but also push monitor data trough it.
     
  6. muekno

    muekno Member HowtoForge Supporter

    Sorry but still problem with sync

    Config:
    Ispconfig master in DMZ (Mail + Console)
    Ispconfig slave in DMS primary DNS
    Ispconfig slave in other DMZ over the internet secondary DNS

    I can telnet on Port 3306 mysql from secondary DNS console to Ispconfig master
    I can see actual system log of secondary DNS in Ispconfig monitor

    Used actual Ispconfig 3, all servers open SuSe 12.2 or 12.3 actual patches

    Ig I add change DNS records they are visible in primary DNS checked by nslookup but not in secondary DNS check by NS lookup.
    Telent from prim DNS to secondary DNS port 53 ist ok and vice versa
    restart from secondary dns has no errors but seems not to update.
    masters in slave named.include.conf has public ip adress of prime DNS
    ispconfig console hst public ip address of sec dns

    Any hinst what to check, test now or how to force a sync

    Thanks Rainer
     
  7. muekno

    muekno Member HowtoForge Supporter

    additional info

    why I think sync is not working.
    sec DNS named.conf.include still showing zones deleted via console and not more shown in prime DNS named.conf.include

    Rainer
     
  8. till

    till Super Moderator Staff Member ISPConfig Developer

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