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SETUID / SETGID on a binary executable stopped working following upgrade of Fedora Core

I have a C program that needs access to a protected directory full of stuff.strong text The idea is that only the program or the administrator have access. In the past on Linux platforms, I've used ...
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1answer
35 views

Postfix mail server taken over by spammers following update of environment despte countermeasures

Long configured, stable Postfix mail server on internal system with greylisting, a long list of restrictions and real-time black-listing, reachable through a gateway / firewall via forwarded port ...
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65 views

Postfix maillog: warning: host nb-mx-vip1.prodigy.net[207 .115.36.20]:25 greeted me with my own hostname

Mail server on internal system, reachable through a gateway / firewall via forwarded port returned this error. I upgraded my environment (unadvisedly) with Fedora Core 19 and have had lots of ...
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296 views

FC19 FirewallD debugging help requested: ports not forwarding

New Fedora Core 19 system refuses to forward port from external to internal zone, no logging data found. The Scenario is simply that I've got a system that serves as a firewall / gateway, has an ...
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1answer
36 views

Bizzare routing: EITHER accepts emails OR sends depending if NetworkManager is running

Due to an otherwise unrelated hardware failure (long story) I've been forced to return an older Fedora Core system into service as a mail server. It's primary service is as a file server and Samba ...
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288 views

firewalld: trouble forwarding port 25 while other ports forward just fine, “rich rule” logging shows NO entries

So, I installed Fedora Core 19 for the first time as a replacement for an older system whose disk had finally died. The system serves as a web server and gateway / firewall, protecting internal ...
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584 views

Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports

Following a gateway / firewall system's hardware failure, a younger version of Fedora Core (17) was installed on new hardware, and the old 'iptables' and system-config-firewall files from ...