These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] net-analyzer/traceroute-2.1.5::gentoo  USE="-static" 74 KiB
[ebuild  N     ] net-misc/iprange-1.0.4::gentoo  102 KiB
[ebuild  N     ] net-firewall/firehol-3.1.8::gentoo  USE="ipv6 -doc -ipset" 1387 KiB

Total: 3 packages (3 new), Size of downloads: 1563 KiB