We are still working for one of our client, a mobile phone operator company that operates 3G network.
We encountered a problem when integrating the card management system with a provisioning system from a world leader company in mediation solution. The software were hardcoded to receive '226 Transfer successful', while our installed vsftp responsded with '226 File receive OK'. They said that all works with their other systems (which were implemented by the same company). Of course it works, but not with our vsftp.
The vsftp has some variance on the response code '226'. Sometimes it is '226 File receive OK', sometimes it is '226 Directory send OK.'.
There is something with the RFC for FTP, that it does not specify the whole thing, which is allowed and which is not. Some software simply just does not conform to the standard. What is intended to be sample has been taken as the rule. Some application just do not cooperate with each other.
Eventually we decided the simplest thing to do without much impact was too replace the vsftp server with wu-ftpd, the same product used in all the other platform.
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