We have performed "Update Checks" and have downloaded the required files to ensure that software is up-to-date. Then they will immediately attempt to process the card again within around 10 to 30 seconds and the transaction will succeed. Typically, when a card is being processed, the VX-520 user will get a "Host Connect Failed" error. It almost seems as if it could be a DNS issue but it doesn't make sense why some transactions will process the first time and others wont. Occasionally, several transactions can be ran in conjunction and will process correctly. This usually happens only one out of seven times but corrects itself. On the VX-520, troubleshooting reports were ran which will occasionally show that the DNS ping will fail on the 192.168.0.X server which is our primary internal DNS server. All other traffic seems to be passing fine. No firewall rules are set on the G-240-W-E. Everything else in our environment is working correctly. When converting this facility over, we are using dynamic public ip assignments so no statics are assigned. The new routers we deploy are the Nokia G-240-W-E ONT. We were previously running an older Linksys router via PPPOe connection via public static ip address. We recently switched over to our own city-owned fiber optic internet which involves us switching routers. G-Works - Simple City is our Financial accounting software that works in conjunction to the Verifone VX-520 The reader worked fine before switching ISPs, but we are not finding anything that is getting in the way. The reader is located in a front office with a CAT 6 cable going to an unmanaged switch, the feed to it goes straight back to a switch over Cat 5e. Internal Network - 2 Active Directory servers providing internal DNS services and DHCP with DNS forwarders set to OpenDNS primary and secondary servers: ONT (Router) - Nokia G-240-W-E - Acting as a Gateway only - /24 subnet for LAN devices - No VLANs - DNS set to OpenDNS primary and secondary servers: ISP - City - Owned Network - Dynamically Assigned Public IP Address
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