--- name: "nemesis-icmp" section: "1" platform: "linux" package: "nemesis" version: "1:1.4-1" release: "Debian 5.0 (Lenny)" platforms: ["linux"] url: "https://new.carta.tech/nemesis-icmp" --- # nemesis-icmp(1) ICMP Protocol (The Nemesis Project) ## NAME nemesis-icmp - ICMP Protocol (The Nemesis Project) ## SYNOPSIS **nemesis-icmp \[-vZ?\] \[-a** *ICMP-timestamp-request-reply-transmit-time* **\] \[-b** *original-destination-IP-address* **\] \[-B** *original-source-IP-address* **\] \[-c** *ICMP-code* **\] \[-d** *Ethernet-device* **\] \[-D** *destination-IP-address* **\] \[-e** *ICMP-ID* **\] \[-f** *original-IP-fragmentation* **\] \[-F** *fragmentation-options* **\] \[-G** *preferred-gateway* **\] \[-H** *source-MAC-address* **\] \[-i** *ICMP-type* **\] \[-I** *IP-ID* **\] \[-j** *original-IP-TOS* **\] \[-J** *original-IP-TTL* **\] \[-l** *original-IP-options-file* **\] \[-m** *ICMP-mask* **\] \[-M** *destination-MAC-address* **\] \[-o** *ICMP-timestamp-request-transmit-time* **\] \[-O** *IP-options-file* **\] \[-p** *original-IP-protocol* **\] \[-P** *payload-file* **\] \[-q** *ICMP-injection-mode* **\] \[-r** *ICMP-timestamp-request-reply-received-time* **\] \[-S** *source-IP-address* **\] \[-t** *IP-TOS* **\] \[-T** *IP-TTL* **\]** ## DESCRIPTION **The Nemesis Project** is designed to be a command line-based, portable human IP stack for UNIX-like and Windows systems. The suite is broken down by protocol, and should allow for useful scripting of injected packets from simple shell scripts. **nemesis-icmp** provides an interface to craft and inject ICMP packets allowing the user to specify any portion of an ICMP packet as well as lower-level IP packet information. ## ICMP Options - \-c ICMP-type Specify the *ICMP-code* within the ICMP header. - \-e ICMP-ID Specify the *ICMP-ID* within the ICMP header. - \-G preferred-gateway Specify the *preferred-gateway-IP-address* for ICMP redirect injection. - \-i ICMP-type Specify the *ICMP-type* within the ICMP header. - \-m address-mask Specify the *IP-address-mask* for ICMP address mask packets. - \-P payload-file This will case nemesis-icmp to use the specified *payload-file* as the payload when injecting ICMP packets. For packets injected using the raw interface (where -d is not used), the maximum payload size is 65387 bytes. For packets injected using the link layer interface (where -d IS used), the maximum payload size is 1352 bytes. Payloads can also be read from stdin by specifying '-P -' instead of a payload file. Windows systems are limited to a maximum payload size of 1352 bytes for ICMP packets. - \-q ICMP-injection-mode Specify the *ICMP-injection-mode* to use when injecting. Valid modes are: ``` -qE (ICMP echo) -qM (ICMP address mask) -qU (ICMP unreachable) -qX (ICMP time exceeded) -qR (ICMP redirect) -qT (ICMP timestamp) ``` Only one mode may be specified at a time. - \-s ICMP-sequence-number Specify the *ICMP-sequence-number* within the ICMP header. - \-v verbose-mode Display the injected packet in human readable form. Use twice to see a hexdump of the injected packet with printable ASCII characters on the right. Use three times for a hexdump without decoded ASCII. ## ICMP TIMESTAMP OPTIONS - \-a ICMP-timestamp-request-reply-transmit-time Specify the *ICMP-timestamp-request-reply-transmit-time* (the time a reply to an ICMP timestamp request was transmitted) within the ICMP timestamp header. - \-o ICMP-timestamp-request-transmit-time Specify the *ICMP-timestamp-request-transmit-time* (the time an ICMP timestamp request was transmitted) within the ICMP timestamp header. - \-r ICMP-timestamp-request-reply-received-time Specify the *ICMP-timestamp-request-reply-received-time* (the time a reply to an ICMP timestamp request was received) within the ICMP timestamp header. ## ICMP ORIGINAL DATAGRAM OPTIONS - \-b original-destination-IP-address Specify the *original-destination-IP-address* within an ICMP unreachable, redirect or time exceeded packet. - \-B original-source-IP-address Specify the *original-source-IP-address* within an ICMP unreachable, redirect or time exceeded packet. - \-f original-fragmentation-options Specify the *original-IP-fragmentation-options* within an ICMP unreachable, redirect or time exceeded packet. For more information reference the '-F' command line switch. - \-j original-IP-TOS Specify the *original-IP-type-of-service (TOS)* within an ICMP unreachable, redirect or time exceeded packet. - \-J original-IP-TTL Specify the *original-IP-time-to-live (TTL)* within an ICMP unreachable, redirect or time exceeded packet. - \-l original-IP-options-file This will cause nemesis-icmp to use the specified *original-IP-options-file* as the options when building the original IP header for the injected ICMP unreachable, redirect or time exceeded packet. IP options can be up to 40 bytes in length. The IP options file must be created manually based upon the desired options. IP options can also be read from stdin by specifying '-O -' instead of an IP-options-file. - \-p original-IP-protocol Specify the *original-IP-protocol* within an ICMP unrechable, redirect or time exceeded packet. ## IP OPTIONS - \-D destination-IP-address Specify the *destination-IP-address* within the IP header. - \-F fragmentation-options (-F\[D\],\[M\],\[R\],\[offset\]) Specify the *fragmentation options:* ``` -FD (don't fragment) -FM (more fragments) -FR (reserved flag) -F ``` within the IP header. IP fragmentation options can be specified individually or combined into a single argument to the -F command line switch by separating the options with commas (eg. '-FD,M') or spaces (eg. '-FM 223'). The IP fragmentation offset is a 13-bit field with valid values from 0 to 8189. Don't fragment (DF), more fragments (MF) and the reserved flag (RESERVED or RB) are 1-bit fields. NOTE: Under normal conditions, the reserved flag is unset. - \-I IP-ID Specify the *IP-ID* within the IP header. - \-O IP-options-file This will cause nemesis-icmp to use the specified *IP-options-file* as the options when building the IP header for the injected packet. IP options can be up to 40 bytes in length. The IP options file must be created manually based upon the desired options. IP options can also be read from stdin by specifying '-O -' instead of an IP-options-file. - \-S source-IP-address Specify the *source-IP-address* within the IP header. - \-t IP-TOS Specify the *IP-type-of-service (TOS)* within the IP header. Valid type of service values: ``` 2 (Minimize monetary cost) 4 (Maximize reliability) 8 (Maximize throughput) 24 (Minimize delay) ``` NOTE: Under normal conditions, only one type of service is set within a packet. To specify multiple types, specify the sum of the desired values as the type of service. - \-T IP-TTL *IP-time-to-live (TTL)* within the IP header. ## DATA LINK OPTIONS - \-d Ethernet-device Specify the name (for UNIX-like systems) or the number (for Windows systems) of the *Ethernet-device* to use (eg. fxp0, eth0, hme0, 1). - \-H source-MAC-address Specify the *source-MAC-address* (XX:XX:XX:XX:XX:XX). - \-M destination-MAC-address Specify the *destintion-MAC-address* (XX:XX:XX:XX:XX:XX). - \-Z list-network-interfaces Lists the available network interfaces by number for use in link-layer injection. NOTE: This feature is only relevant to Windows systems. ## DIAGNOSTICS Nemesis-icmp returns 0 on a successful exit, 1 if it exits on an error. ## BUGS Send concise and clearly written bug reports to jeff@snort.org ## AUTHOR Jeff Nathan \ Originally developed by Mark Grimes \ ## SEE ALSO **[nemesis-arp(1)](/nemesis-arp/1.md), [nemesis-dns(1)](/nemesis-dns/1.md), [nemesis-ethernet(1)](/nemesis-ethernet/1.md), [nemesis-igmp(1)](/nemesis-igmp/1.md),** **[nemesis-ip(1)](/nemesis-ip/1.md), [nemesis-ospf(1)](/nemesis-ospf/1.md), [nemesis-rip(1)](/nemesis-rip/1.md), [nemesis-tcp(1)](/nemesis-tcp/1.md),** **[nemesis-udp(1)](/nemesis-udp/1.md)**