DNS/FCP/フラグメント処理について、ここに記述してください。
7.5.3 MTUとフラグメント https://www.alaxala.com/jp/techinfo/archive/manual/AX7700R/HTML/10_10_/APGUIDE/0084.HTM
https://beginners-network.com/fragment.html
https://milestone-of-se.nesuke.com/nw-basic/grasp-nw/mtu-mss-fragment-segment/
https://apan.net/meetings/Daejeon2013/Session/NRW/[S3-2]APAN_NRW2013.pdf
https://www.revolvy.com/page/IP-fragmentation-attack
http://www.digital.net/~gandalf/Rose_Frag_Attack_Explained.htm The "Rose attack"
IP Fragment Too Many Datagrams https://tools.cisco.com/security/center/viewIpsSignature.x?signatureId=1205&signatureSubId=0
1. RFC 1858
Security Considerations for IP Fragment Filtering
https://tools.ietf.org/html/rfc1858
IP reassembly queue size = 64 @ Linux (needs further work