反向解析的地址以 .bng 结尾?

反向解析的地址以 .bng 结尾?

当我通过 ssh 进入我的服务器时,我会定期检查netstat --tcp,但是今天发现了一种我以前从未见过的奇怪的带连字符的地址格式:

Proto   Recv   Sent   Local Address       Foreign Address            State
tcp6    0      0      mydomain.com:www    xxx-xxx-xxx-xxx.bng:xxxx   TIME_WAIT

它就像一个 IP 地址,x 代表数字,但由于带有连字符,我认为它可能是一个域名,但“.BNG”不是顶级域名。

我在谷歌上搜索到的所有信息都是思科的“宽带网络网关”,所以这可能与我的主机有关?

答案1

您看到的名称是反向 DNS 域中的内容,它不必是有效的。网络管理员可以在反向 DNS 中输入任何他/她想要的内容。如果您想知道谁正在连接到您的服务器,您应该使用 查看 IP 地址netstat --tcp --numeric

如果您想知道哪个组织是 IP 地址的持有者,您可以使用whois,它将向您显示谁是持有者。数据分布在不同的 whois 服务器上,但最近的 whois 客户端可能会自动确定正确的服务器(我删除了一些输出以使其更易读/易懂):

$ whois 37.77.56.75

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#

NetRange:       37.0.0.0 - 37.255.255.255
CIDR:           37.0.0.0/8
OriginAS:
NetName:        RIPE-37
NetHandle:      NET-37-0-0-0-1
Parent:
NetType:        Allocated to RIPE NCC
Comment:        These addresses have been further assigned to users in
Comment:        the RIPE NCC region. Contact information can be found in
Comment:        the RIPE database at http://www.ripe.net/whois
RegDate:        2010-11-30
Updated:        2011-01-17
Ref:            http://whois.arin.net/rest/net/NET-37-0-0-0-1

ReferralServer: whois://whois.ripe.net:43


% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Information related to '37.77.56.64 - 37.77.56.95'

% Abuse contact for '37.77.56.64 - 37.77.56.95' is '[email protected]'

inetnum:        37.77.56.64 - 37.77.56.95
netname:        STEFFANN-OFFICE1
descr:          S.J.M. Steffann Office
country:        NL
admin-c:        SJMS-RIPE
tech-c:         SJMS-RIPE
status:         ASSIGNED PA
mnt-by:         STEFFANN-MNT
mnt-by:         STEFFANN-AUTO-MNT
source:         RIPE # Filtered

role:           SJM Steffann NOC contact
address:        Tienwoningenweg 46
address:        7312 DN  Apeldoorn
address:        The Netherlands
admin-c:        SJMS1-RIPE
tech-c:         SJMS1-RIPE
abuse-mailbox:  [email protected]
nic-hdl:        SJMS-RIPE
mnt-by:         STEFFANN-MNT
source:         RIPE # Filtered

% Information related to '37.77.56.0/21AS57771'

route:          37.77.56.0/21
descr:          S.J.M. Steffann
origin:         AS57771
mnt-by:         STEFFANN-MNT
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.60.2 (WHOIS3)

因此,在这里您可以看到 37.77.56.75 属于网络 STEFFANN-OFFICE1,这是我的办公室。您还可以看到您应该联系[电子邮件保护]当您看到来自该网络的滥用行为时。

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