Phil Davis 6777fc3b6e diag_arp allow underscore in resolved host names ... is_hostname() and is_domain() allow underscore in the names. So it is possible to have underscore in host names, for example in DHCP server static mapped entries I have some things like: 10.42.3.4 client-pc-01_LAN 10.42.3.5 client-pc-01_WIFI These reverse-resolve fine - 10.42.3.4 becomes client-pc-01_LAN But the preg_match here misses such names that have an underscore in them. I noticed this when looking into forum post: https://forum.pfsense.org/index.php?topic=88956.0		2015-02-18 14:33:13 +05:45
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local	diag_arp allow underscore in resolved host names	2015-02-18 14:33:13 +05:45
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