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In the beginning of the year 2011, we decided to apply IPv6 configuration to our data center (VeriTeknik) and requested our IPv6 block from RIPE. RIRs give out /32 blocks to LIRs at the first assignment.
The Preperation Steps Request your IPv6 Addresses from your RIR or LIR Add IPv6 Route [...]
Continue Reading →If it appears to be all (***) instead of your mail hostname and if you get, “550 Sorry, your HELO/EHLO greeting must resolve (#5.7.1)” error when sending mail to your mail server from outside, run the following command in your CISCO firewall:
no fixup protocol smtp 25
and save with the “wr mem” command
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