Category Archives: Security

SORBS, Blacklists and Smarthosts

I’ve had several clients in the last few months report issues with recipients not receiving emails. ¬†With the proliferation of SPAM and viruses email admins are coming up with new ways to identify and block unwanted email as cheaply as … Continue reading

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WatchGuard NAT

Client called me with an FTP issue on Monday.¬† His FTP server was blocking all traffic for security reasons. Turned out the Watchguard firewall (750e) dynamic NAT was relabeling traffic with the IP address of the firewall, so the FTP … Continue reading

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