Fedora Firewall Management 101

On Fedora Core, the iptables rules are stored in /etc/sysconfig/iptables. To change the rules, the iptables(8) utility is used. When done, store the updated rules in /etc/sysconfig/iptables by running the following as root: # /sbin/iptables-save > /etc/sysconfig/iptables I’m sure I’ll need this again, and I’m sure I’ll have forgotten all of it by then.

The GNU Debugger (gdb) and Files loaded at Runtime

I’m working on a project where one program loads an ELF file at runtime and then transfers control to that dynamically loaded file. The file will be loaded at an address obtained by malloc(3), so the address will be arbitrary (from a user perspective). Normally, if a crash occurs while a program is being run […]