Using packet captures we have determined that as Orion sends out a batch of ICMP request and as the hosts respond with ICMP replies the Orion server will occasionally respond with a batch of “Destination Unreachable – Protocol Unreachable”. ...
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dwDestUnreachs:The number of destination-unreachable messages received or sent. A destination-unreachable message is sent to the originating computer when the destination address in adatagramcannot be reached. dwTimeExcds:The number of TTL-exceeded messages received or sent. A TTL-exceeded message ...
阻止出站的ICMP Destination unreachable消息,因为它可能会泄漏内部网络的结构。不过有一个例外,对于那些允许外部网络通过TCP访问的内部主机(如位于DMZ区的Web 服务器)发出的Destination unreachable,则应该允许它通过。为了能够支持“Path MTU Discovery”,您应该允许出站的“Packet Too Big”消息(类型3,代码4)到达那些主...
[!] --protocol -p proto protocol: by number or name, eg. `tcp' [!] --source -s address[/mask][...] source specification [!] --destination -d address[/mask][...] destination specification [!] --in-interface -i input name[+] ...
a race between ICMP protocol unreachable and connect() On Tue, Jan 04, 2011 at 02:33:04PM +0800, Eugene Teo wrote: > http://git.kernel.org/linus/50b5d6ad63821cea324a5a7a19854d4de1a0a819 > https://bugzilla.redhat.com/CVE-2010-4526 > > commit 50b5d6ad63821cea324a5a7a19854d4d...
dwDestUnreachs:The number of destination-unreachable messages received or sent. A destination-unreachable message is sent to the originating computer when the destination address in adatagramcannot be reached. dwTimeExcds:The number of TTL-exceeded messages received or sent. A TTL-exceeded message ...
#define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ #define ICMP_REDIRECT 5 /* Redirect (change route) */ #define ICMP_ECHO 8 /* Echo Request */ #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ ...
dwDestUnreachs:The number of destination-unreachable messages received or sent. A destination-unreachable message is sent to the originating computer when the destination address in adatagramcannot be reached. dwTimeExcds:The number of TTL-exceeded messages received or sent. A TTL-exceeded message ...
dwDestUnreachs:The number of destination-unreachable messages received or sent. A destination-unreachable message is sent to the originating computer when the destination address in adatagramcannot be reached. dwTimeExcds:The number of TTL-exceeded messages received or sent. A TTL-exceeded message ...