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version 1.1.1.2, 2014/06/15 16:26:43
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version 1.1.1.4, 2021/03/16 23:40:57
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Line 10 arping/README
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Line 10 arping/README
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| Introduction |
Introduction |
| ------------ |
------------ |
| Arping is a util to find out it a specific IP address on the LAN is 'taken' | Arping is a util to find out if a specific IP address on the LAN is 'taken' |
| and what MAC address owns it. Sure, you *could* just use 'ping' to find out if |
and what MAC address owns it. Sure, you *could* just use 'ping' to find out if |
| it's taken and even if the computer blocks ping (and everything else) you still |
it's taken and even if the computer blocks ping (and everything else) you still |
| get an entry in your ARP cache. But what if you aren't on a routable net? Or |
get an entry in your ARP cache. But what if you aren't on a routable net? Or |
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Line 43 I try to test arping on these platforms before any rel
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Line 43 I try to test arping on these platforms before any rel
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| * Latest Debian stable x86 and amd64 |
* Latest Debian stable x86 and amd64 |
| * Linux (Debian or Ubuntu) on arm |
* Linux (Debian or Ubuntu) on arm |
| * Latest OpenBSD x86 or amd64 |
* Latest OpenBSD x86 or amd64 |
| * FreeBSD x86 |
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| * Solaris 10 sparc |
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| |
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| I don't have these systems up and runnig 24/7, but I try to get them tested | Systems that it should still work on, but I don't personally regularly test: |
| every now and then: | * Debian Alpha |
| | * FreeBSD |
| | * IRIX 6.5 mips (last test 2009-09-27) |
| * MacOS X |
* MacOS X |
| * Debian alpha | * NetBSD |
| * OpenBSD sparc64 (last test: 2009-10-02) |
* OpenBSD sparc64 (last test: 2009-10-02) |
| * IRIX 6.5 mips (last test 2009-09-27) | * Solaris |
| |
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| Mailing list |
Mailing list |
| ------------ |
------------ |
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Line 122 A: -T <IP/host> allows you to restrict the arping to a
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Line 122 A: -T <IP/host> allows you to restrict the arping to a
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| --- |
--- |
| Q: ./configure says I need libnet and/or libpcap |
Q: ./configure says I need libnet and/or libpcap |
| |
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| A: Arping depends on libnet 1.1.x and libpcap, get libnet at: | A: Arping depends on libnet 1.1 or newer, and libpcap. Get libnet from |
| http://www.packetfactory.net/libnet and libpcap from http://www.tcpdump.org. | https://github.com/libnet/libnet and libpcap from http://www.tcpdump.org. |
| | Or more likely they were both included in your Linux distribution. |
| |
|
| Lately www.packetfactory.net seems to be down, so you can get the original | The original libnet site |
| tarball from the Debian archives: | was http://packetfactory.openwall.net/projects/libnet/, but is not updated. |
| http://ftp.debian.org/debian/pool/main/libn/libnet/libnet_1.1.4.orig.tar.gz | |
| If that exact file doesn't exist there probably is one with a higher | |
| version number. | |
| |
| Or github.com: | |
| http://github.com/sam-github/libnet | |
| http://github.com/ThomasHabets/libnet | |
| --- |
--- |
| Q: I get bus error on my non-x86 box |
Q: I get bus error on my non-x86 box |
| |
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Line 197 A: Be my guest, but if care about security *at all* yo
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Line 191 A: Be my guest, but if care about security *at all* yo
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| That being said, on Linux you can add the CAP_NET_RAW capability to arping |
That being said, on Linux you can add the CAP_NET_RAW capability to arping |
| limiting the damage if arping were to be compromised: |
limiting the damage if arping were to be compromised: |
| sudo setcap cap_net_raw+ep /usr/local/sbin/arping |
sudo setcap cap_net_raw+ep /usr/local/sbin/arping |
| This requires a libnet which does not explicitly check for uid 0. The | This requires a libnet 1.1.5 or higher, which does not explicitly check for |
| current version of libnet does check this, so unless you patch it it will | uid 0. |
| not help. | |
| |
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| Patch: | For older versions of Libnet: |
| http://github.com/ThomasHabets/libnet/commit/aaa383b5c816107082508b7646929a9479b81645 |
http://github.com/ThomasHabets/libnet/commit/aaa383b5c816107082508b7646929a9479b81645 |
| --- |
--- |
| Q: What's this -A switch all about, I don't understand it. |
Q: What's this -A switch all about, I don't understand it. |
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