Sysadmin > SerVices > BinD9 > EnableEDNSCiscoASA

EDNS

How to enable the DNS Extension EDNS in a Cisco ASA (>8.2.2)

policy-map type inspect dns preset_dns_map
    parameters
        message-length maximum client auto
        message-length maximum 512

ASA >7.0

policy-map type inspect dns preset_dns_map
    parameters
        message-length maximum 4096

ASA >6.0

fixup protocol dns maximum-length 4096