icmp(7) Miscellaneous Information Manual icmp(7) icmp - Linux, IPv4 ICMP Internet Control Message Protocol, RFC 792. . ; , ICMP . , ICMP-. ICMP- , (raw) , IPPROTO_ICMP. raw(7). ICMP-, , ICMP_FILTER. ICMP , . Linux ICMP- . ICMP_REDIRECT ICMP_DEST_UNREACH . /proc IP ICMP /proc. /proc/sys/net/ipv4/. ICMP . Linux 2.2 ICMP << >> (token bucket). -- jiffy, . jiffy , , 10 i386 1 alpha ia64. icmp_destunreach_rate (Linux 2.2 to Linux 2.4.9) ICMP- Destination Unreachable . ICMP_FRAG_NEEDED, MTU . icmp_echo_ignore_all ( Linux 2.2) , Linux ICMP_ECHO. icmp_echo_ignore_broadcasts ( Linux 2.2) , Linux ICMP_ECHO, . icmp_echoreply_rate (Linux 2.2 to Linux 2.4.9) ICMP_ECHOREPLY ICMP_ECHOREQUEST. icmp_errors_use_inbound_ifaddr (; : ; Linux 2.6.12) , ICMP . , , , ICMP. , . , . , , , , . icmp_ignore_bogus_error_responses (; : ; Linux 2.2) RFC1122, . , , . , , . icmp_paramprob_rate (Linux 2.2 to Linux 2.4.9) ICMP_PARAMETERPROB. , IP. icmp_ratelimit (; : 1000; Linux 2.4.10) ICMP , icmp_ratemask ( ). 0 , . icmp_ratemask (; : ; Linux 2.4.10) ICMP, . : IHGFEDCBA9876543210 : 0000001100000011000 (0x1818) ( include/linux/icmp.h Linux): 0 3 * 4 * 5 8 B * C * D E F G H I , , ( , ). icmp_timeexceed_rate (Linux 2.2 to Linux 2.4.9) ICMP_TIME_EXCEEDED. , (hops). ping_group_range ( ; ; Linux 2.6.39) ID ( ID , ), ICMP Echo. <<1 0>>, , ICMP Echo. Support for the ICMP_ADDRESS request was removed in Linux 2.2. ICMP_SOURCE_QUENCH Linux 2.2. IPPROTO_ICMP, . ICMP_REDIRECT , Linux . , , , . 64- , ICMP_TIMESTAMP, , 1970-01-01 00:00:00 +0000 (UTC). Linux- ICMP ICMP- . netstat(8), inode 0. . ip(7), rdisc(8) RFC 792 ICMP. Azamat Hackimov , Dmitriy S. Seregin , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . icmp(7)