GNU / Linux /

Ataque fuerzabruta a travez puerto 22 SSH

Participa en el tema Ataque fuerzabruta a travez puerto 22 SSH en el foro GNU / Linux.
Bueno mientras miraba television me percato de que hay una alta actividad de red en ...

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    1 links from elsewhere to this Post. Click to view. #1 Ataque fuerzabruta a travez puerto 22 SSH
    Bueno mientras miraba television me percato de que hay una alta actividad de red en mi equipo a travez de Conky, observando mas detalladamente veo que son conexiones a travez del puerto ssh (Tengo configurado Conky para que me informe estas conexiones), en las cuales veo que eran entre 1 y 2 simultaneas.
    Inmediatamente (cual pelicula de ciencia ficcion) y cegado por la paranoia desconecto el cable de red, cierro el servicio ssh y analizo el archivo /var/log/messages

    aqui les dejo adjunto el archivo TXT con la salida del comando $cat /var/log/messages | grep sshd

    Es interesante ver como utiliza el metodo de diccionario (en este caso de nombres) para tratar de establecer la conexion. Aunque mi USER no sale en el diccionario, cabe destacar aqui la importancia de una contraseña segura (www.passwordmeter.com sacando aqui 100% seguridad.) para impedir que estos ataques lleguen a un exito.

    haciendo un whois a las ips de donde provienen los ataques obtengo

    $ whois 201.6.106.248 Brazil
    % Joint Whois - whois.lacnic.net
    % This server accepts single ASN, IPv4 or IPv6 queries

    % Brazilian resource: whois.registro.br


    % Copyright (c) Nic.br
    % The use of the data below is only permitted as described in
    % full by the terms of use (http://registro.br/termo/en.html),
    % being prohibited its distribution, comercialization or
    % reproduction, in particular, to use it for advertising or
    % any similar purpose.
    % 2009-10-25 16:02:43 (BRST -02:00)

    inetnum: 201.6/16
    aut-num: AS28573
    abuse-c: GRSVI
    owner: NET Servi�os de Comunica��o S.A..
    ownerid: 000.065.376/0002-65
    responsible: Grupo de Seguran�a da Informa��o V�rtua
    country: BR
    owner-c: GRSVI
    tech-c: GRSVI
    inetrev: 201.6.0/17
    nserver: dns1.virtua.com.br
    nsstat: 20091023 AA
    nslastaa: 20091023
    nserver: dns2.virtua.com.br
    nsstat: 20091023 AA
    nslastaa: 20091023
    created: 20031127
    changed: 20080512

    nic-hdl-br: GRSVI
    person: Grupo de Seguran�a V�rtua
    e-mail: virtua@virtua.com.br
    created: 20080512
    changed: 20090518

    % Security and mail abuse issues should also be addressed to
    % cert.br, http://www.cert.br/, respectivelly to cert@cert.br
    % and mail-abuse@cert.br
    %
    % whois.registro.br accepts only direct match queries. Types
    % of queries are: domain (.br), ticket, provider, ID, CIDR
    % block, IP and ASN.
    $ whois 200.72.1.60 Chile

    % Joint Whois - whois.lacnic.net
    % This server accepts single ASN, IPv4 or IPv6 queries

    % LACNIC resource: whois.lacnic.net


    % Copyright LACNIC lacnic.net
    % The data below is provided for information purposes
    % and to assist persons in obtaining information about or
    % related to AS and IP numbers registrations
    % By submitting a whois query, you agree to use this data
    % only for lawful purposes.
    % 2009-10-25 16:04:02 (BRST -02:00)

    inetnum: 200.72.0/17
    status: allocated
    owner: ENTEL CHILE S.A.
    ownerid: CL-ECSA-LACNIC
    responsible: ENTEL CHILE S.A.
    address: Andr�s Bello, 2687,
    address: 56 - Santiago -
    country: CL
    phone: +56 2 3600123 []
    owner-c: BRM
    tech-c: BRM
    abuse-c: BRM
    inetrev: 200.72.0/17
    nserver: POLUX.ENTELCHILE.NET
    nsstat: 20091023 AA
    nslastaa: 20091023
    nserver: CASTOR.ENTELCHILE.NET
    nsstat: 20091023 AA
    nslastaa: 20091023
    remarks: ADDRESSES WITHIN THIS BLOCK ARE NON-PORTABLE
    remarks: Reassignment Information for this block can be found at
    remarks: rs.entelchile.net
    created: 20010612
    changed: 20020426

    nic-hdl: BRM
    person: ENTEL CHILE S.A.
    e-mail: enteladminip@ENTEL.CL
    address: Amunategui, 20, piso 10
    address: 4254 - Santiago -
    country: CL
    phone: +56 2 3600123 []
    created: 20030317
    changed: 20060728

    % whois.lacnic.net accepts only direct match queries.
    % Types of queries are: POCs, ownerid, CIDR blocks, IP
    % and AS numbers.
    whois 210.245.81.5 Vietnam Este lo saque a travez del codigo telefonico de pais (+84)

    % [whois.apnic.net node-1]
    % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

    inetnum: 210.245.80.0 - 210.245.87.255
    netname: IPHostingGame-NET
    country: vn
    descr: Dai IP cho Hosting Game
    admin-c: FHIG1-AP
    tech-c: FHIG1-AP
    status: ALLOCATED NON-PORTABLE
    changed: hm-changed@vnnic.net.vn 20080411
    mnt-by: MAINT-VN-FPT
    source: APNIC

    role: FPT HANOI IPADMIN GROUP
    address: 48 Van Bao, Ba Dinh
    address: Ha Noi
    country: VN
    phone: +84-4-7601060
    fax-no: +84-4-7262163
    e-mail: abuse@fpt.vn
    trouble: send spam reports to abuse@fpt.vn
    trouble: and abuse reports to abuse@fpt.vn
    admin-c: TPV1-AP
    tech-c: NTT9-AP
    nic-hdl: FHIG1-AP
    notify: hm-changed@vnnic.net.vn
    mnt-by: MAINT-VN-FPT
    changed: hm-changed@vnnic.net.vn 20090325
    source: APNIC
    whois 61.50.201.178 China

    % [whois.apnic.net node-1]
    % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

    inetnum: 61.50.128.0 - 61.50.255.255
    netname: CNCBTJQ-NET
    descr: China Netcom Group Beijing Corporation
    country: CN
    admin-c: CY455-AP
    tech-c: CY455-AP
    mnt-by: MAINT-CNCGROUP-BJ
    mnt-lower: MAINT-CNCGROUP-BJ-JQ
    changed: hostmast@publicf.bta.net.cn 20041209
    status: ALLOCATED NON-PORTABLE
    source: APNIC

    person: Chen Yong
    address: He Ping Men Wai Chang Dian Jia 9 Xuan Wu
    address: District Beijing 100050
    nic-hdl: CY455-AP
    phone: +86-10-63032036
    fax-no: +86-10-63161355
    e-mail: chenyong1@bjtelecom.com.cn
    mnt-by: MAINT-CNCGROUP-BJ
    changed: hostmast@publicf.bta.net.cn 20041029
    source: APNIC
    changed: hostmast@publicf.bta.net.cn 20050520
    whois 190.152.80.10 Peru

    % Joint Whois - whois.lacnic.net
    % This server accepts single ASN, IPv4 or IPv6 queries

    % LACNIC resource: whois.lacnic.net


    % Copyright LACNIC lacnic.net
    % The data below is provided for information purposes
    % and to assist persons in obtaining information about or
    % related to AS and IP numbers registrations
    % By submitting a whois query, you agree to use this data
    % only for lawful purposes.
    % 2009-10-25 16:10:13 (BRST -02:00)

    inetnum: 190.152.64/18
    status: reallocated
    owner: ANDINADATOS
    ownerid: EC-ANDI-LACNIC
    responsible: Juan Camacho / Xavier Moreano
    address: Eloy Alfaro N29-16 y 9 de Octubre, 333, Oficina 124
    address: 000 - Quito - pi
    country: EC
    phone: +593 2 2944800 []
    owner-c: FBM
    tech-c: FBM
    abuse-c: FBM
    created: 20070320
    changed: 20070320
    inetnum-up: 190.152.0/17

    nic-hdl: FBM
    person: John Paredes
    e-mail: jdparedes@ANDINATEL.COM
    address: Av. Eloy Alfaro y 9 de octubre, Edf Plaza Doral, 124,
    address: 17211446 - Quito - NA
    country: EC
    phone: +593 2 2944800 [876]
    created: 20050107
    changed: 20080428

    % whois.lacnic.net accepts only direct match queries.
    % Types of queries are: POCs, ownerid, CIDR blocks, IP
    % and AS numbers.
    whois 190.152.80.10 Ecuador

    % Joint Whois - whois.lacnic.net
    % This server accepts single ASN, IPv4 or IPv6 queries

    % LACNIC resource: whois.lacnic.net


    % Copyright LACNIC lacnic.net
    % The data below is provided for information purposes
    % and to assist persons in obtaining information about or
    % related to AS and IP numbers registrations
    % By submitting a whois query, you agree to use this data
    % only for lawful purposes.
    % 2009-10-25 16:17:34 (BRST -02:00)

    inetnum: 190.152.64/18
    status: reallocated
    owner: ANDINADATOS
    ownerid: EC-ANDI-LACNIC
    responsible: Juan Camacho / Xavier Moreano
    address: Eloy Alfaro N29-16 y 9 de Octubre, 333, Oficina 124
    address: 000 - Quito - pi
    country: EC
    phone: +593 2 2944800 []
    owner-c: FBM
    tech-c: FBM
    abuse-c: FBM
    created: 20070320
    changed: 20070320
    inetnum-up: 190.152.0/17

    nic-hdl: FBM
    person: John Paredes
    e-mail: jdparedes@ANDINATEL.COM
    address: Av. Eloy Alfaro y 9 de octubre, Edf Plaza Doral, 124,
    address: 17211446 - Quito - NA
    country: EC
    phone: +593 2 2944800 [876]
    created: 20050107
    changed: 20080428

    % whois.lacnic.net accepts only direct match queries.
    % Types of queries are: POCs, ownerid, CIDR blocks, IP
    % and AS numbers.
    whois 218.108.10.46 - China de nuevo creo

    % [whois.apnic.net node-1]
    % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

    inetnum: 218.108.10.0 - 218.108.10.255
    netname: gulin1222
    country: CN
    descr: gulin keji kaifa youxiangongsi1222
    admin-c: XW49-AP
    tech-c: XW49-AP
    status: ASSIGNED NON-PORTABLE
    remarks: ************************************************** **
    remarks: * please report spam/abuse to abuse@chinahcn.com *
    remarks: * reports to other addresses will not be processed *
    remarks: ************************************************** **
    changed: keeper@chinahcn.com 20040223
    mnt-by: MAINT-CN-HZCNC
    source: APNIC

    person: Kelly Xue
    nic-hdl: XW49-AP
    e-mail: xuewei@hzdtv.com
    address: Gudang Scientific and Economic Park ,No.398
    address: Tian Mu Shan Roa, Hangzhou, Zhejiang, P.R.C
    phone: +86-571-56808888-8145
    fax-no: +86-571-56800004
    country: CN
    changed: tim@hzdtv.com 20040224
    mnt-by: MAINT-CN-WASU
    source: APNIC

    inetnum: 218.108.10.0 - 218.108.10.255
    netname: gulin1222
    country: CN
    descr: gulin keji kaifa youxiangongsi1222
    admin-c: XW49-CN
    tech-c: XW49-CN
    status: ASSIGNED NON-PORTABLE
    remarks: ************************************************** **
    remarks: * please report spam/abuse to abuse@chinahcn.com *
    remarks: * reports to other addresses will not be processed *
    remarks: ************************************************** **
    changed: keeper@chinahcn.com 20040223
    mnt-by: MAINT-CN-HZCNC
    source: CNNIC

    person: Kelly Xue
    nic-hdl: XW49-CN
    e-mail: xuewei@hzdtv.com
    address: Gudang Scientific and Economic Park ,No.398
    address: Tian Mu Shan Roa, Hangzhou, Zhejiang, P.R.C
    phone: +86-571-56808888-8145
    fax-no: +86-571-56800004
    country: CN
    changed: tim@hzdtv.com 20040224
    mnt-by: MAINT-CN-WASU
    source: CNNIC
    whois 83.103.52.33 - Italia

    % 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

    % Note: This output has been filtered.
    % To receive output for a database update, use the "-B" flag.

    % Information related to '83.103.52.0 - 83.103.52.63'

    inetnum: 83.103.52.0 - 83.103.52.63
    netname: FASTWEB-POP-0201-SMALL-BUSINESS
    descr: Infrastructure for Fastweb's main location
    descr: IP addresses for Small Business customer, second public subnet
    country: IT
    admin-c: IRS2-RIPE
    tech-c: IRS2-RIPE
    status: ASSIGNED PA
    mnt-by: FASTWEB-MNT
    remarks: In case of improper use originating from our network,
    remarks: please mail customer or abuse@fastweb.it
    remarks: INFRA-AW
    source: RIPE # Filtered

    person: ip registration service
    address: Via Caracciolo, 51
    address: 20155 Milano MI
    address: Italy
    phone: +39 02 45451
    fax-no: +39 02 45451
    e-mail: IP.RegistrationService@fastweb.it
    nic-hdl: IRS2-RIPE
    mnt-by: FASTWEB-MNT
    remarks:
    remarks: In case of improper use originating from our network,
    remarks: please mail customer or abuse@fastweb.it
    remarks:
    source: RIPE # Filtered

    % Information related to '83.103.0.0/17AS12874'

    route: 83.103.0.0/17
    descr: Fastweb Networks block
    origin: AS12874
    remarks: 5th block released to it.fastweb local registry.
    mnt-by: FASTWEB-MNT
    remarks: In case of improper use originating from our network,
    please mail customer or abuse@fastweb.it
    source: RIPE # Filtered

    % Information related to '83.103.0.0/18AS12874'

    route: 83.103.0.0/18
    descr: Fastweb Networks block
    origin: AS12874
    mnt-by: FASTWEB-MNT
    remarks:
    remarks: In case of improper use originating from our network,
    remarks: please mail customer or abuse@fastweb.it
    remarks:
    source: RIPE # Filtered
    whois 222.236.47.135 - Korea (Caracteres especiales XD)

    query: 222.236.47.135

    # KOREAN

    ��ȸ������ �Ʒ��� ������, ���� ������ ������ �� �ֽ��ϴ�.

    IPv4�ּ� : 222.236.0.0-222.236.63.255
    ��Ʈ��ũ �̸� : HANANET-INFRA
    ���� ISP�� : broadNnet
    �Ҵ系�� ������ : 20050329
    �Ҵ����� �������� : Y

    [ IPv4�ּ� ���� ���� ���� ]
    ����������ȣ : ORG3930
    ������ : �������̺��ε������ֽ�ȸ�
    �ּ� : ���� �߱� ���빮��5��
    �����ּ� : 267���� SK�������
    ������ȣ : 100-095

    [ ��Ʈ��ũ ������ �ι� ���� ]
    �̸� : �����
    ������ : broadNnet
    �ּ� : ���� �߱� ���빮��5��
    �����ּ� : 267���� SK�������
    ������ȣ : 100-095
    ��ȭ��ȣ : +82-2-106-2
    ���ڿ��� : ip-adm@skbroadband.com

    --------------------------------------------------------------------------------

    ���� ���� IPv4�ּ� �������� ������ �ùٸ��� ���� ���
    �Ʒ��� �ش� ���� ISP �����ڿ��� �����Ͻñ� �ٶ��ϴ�.

    [ ����ISP�� IPv4�ּ� å���� ���� ]
    �̸� : �����
    ��ȭ��ȣ : +82-2-106-2
    ���ڿ��� : ip-adm@skbroadband.com

    [ ����ISP�� IPv4�ּ� ������ ���� ]
    �̸� : �����
    ��ȭ��ȣ : +82-2-106-2
    ���ڿ��� : ip-adm@skbroadband.com

    [ ����ISP�� Network Abuse ������ ���� ]
    �̸� : �����
    ��ȭ��ȣ : +82-2-106-2
    ���ڿ��� : abuse@skbroadband.com

    # ENGLISH

    KRNIC is not an ISP but a National Internet Registry similar to APNIC.
    The following is organization information that is using the IPv4 address.

    IPv4 Address : 222.236.0.0-222.236.63.255
    Network Name : HANANET-INFRA
    Connect ISP Name : broadNnet
    Connect Date : 20050328
    Registration Date : 20050329
    Publishes : Y

    [ Organization Information ]
    Organization ID : ORG3930
    Org Name : SK Broadband Co Ltd
    Address : Seoul Namdaemunno 5(o)-ga Jung-gu
    Zip Code : 100-095

    [ Technical Contact Information ]
    Name : IP manager
    Org Name : SK Broadband Co Ltd
    Address : Seoul Namdaemunno 5(o)-ga Jung-gu
    Zip Code : 100-095
    Phone : +82-2-106-2
    E-Mail : ip-adm@skbroadband.com

    --------------------------------------------------------------------------------

    If the above contacts are not reachable, please contact following ISP
    for further information.

    [ ISP IPv4 Admin Contact Information ]
    Name : IP manager
    Phone : +82-2-106-2
    E-Mail : ip-adm@skbroadband.com

    [ ISP IPv4 Tech Contact Information ]
    Name : IP manager
    Phone : +82-2-106-2
    E-Mail : ip-adm@skbroadband.com

    [ ISP Network Abuse Contact Information ]
    Name : manager
    Phone : +82-2-106-2
    E-Mail : abuse@skbroadband.com
    whois 201.22.213.71 - Brasil de nuevo

    % Joint Whois - whois.lacnic.net
    % This server accepts single ASN, IPv4 or IPv6 queries

    % Brazilian resource: whois.registro.br


    % Copyright (c) Nic.br
    % The use of the data below is only permitted as described in
    % full by the terms of use (http://registro.br/termo/en.html),
    % being prohibited its distribution, comercialization or
    % reproduction, in particular, to use it for advertising or
    % any similar purpose.
    % 2009-10-25 16:24:51 (BRST -02:00)

    inetnum: 201.22/16
    aut-num: AS18881
    abuse-c: GOI
    owner: Global Village Telecom LTDA.
    ownerid: 003.420.926/0002-05
    responsible: IT - Equipe de Redes
    country: BR
    owner-c: GEI26
    tech-c: GVO6
    inetrev: 201.22.192/18
    nserver: dns1.gvt.net.br
    nsstat: 20091022 AA
    nslastaa: 20091022
    nserver: dns2.gvt.net.br
    nsstat: 20091022 AA
    nslastaa: 20091022
    nserver: dns3.gvt.net.br
    nsstat: 20091022 AA
    nslastaa: 20091022
    created: 20041118
    changed: 20041119

    nic-hdl-br: GEI26
    person: GVT - Equipe de redes IT
    e-mail: itredes@gvt.net.br
    created: 20021107
    changed: 20081029

    nic-hdl-br: GOI
    person: GVT - Operacoes Internet
    e-mail: abuse@gvt.net.br
    created: 20050112
    changed: 20050112

    nic-hdl-br: GVO6
    person: GVT Operacao
    e-mail: operacao@gvt.net.br
    created: 20010613
    changed: 20021101

    % Security and mail abuse issues should also be addressed to
    % cert.br, http://www.cert.br/, respectivelly to cert@cert.br
    % and mail-abuse@cert.br
    %
    % whois.registro.br accepts only direct match queries. Types
    % of queries are: domain (.br), ticket, provider, ID, CIDR
    % block, IP and ASN.
    whois 112.72.212.5 - Korea

    % [whois.apnic.net node-1]
    % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

    inetnum: 112.72.128.0 - 112.72.255.255
    netname: HCN
    descr: HYUNDAI COMMUNICATIONS & NETWORK
    descr: 1578-51 Shinrim 1-Dong, Kwanak-gu
    descr: ********************************
    descr: Allocated to KRNIC Member.
    descr: If you would like to find assignment
    descr: information in detail please refer to
    descr: the KRNIC Whois Database at:
    descr: http://whois.nic.or.kr/english/index.htm
    descr: *********************************
    country: KR
    admin-c: IM272-AP
    tech-c: IM272-AP
    status: Allocated Portable
    remarks: www.kcnet5.com
    mnt-by: MNT-KRNIC-AP
    mnt-lower: MNT-KRNIC-AP
    changed: hm-changed@apnic.net 20081229
    source: APNIC

    person: IP Manager
    nic-hdl: IM272-AP
    e-mail: ip@kcnet5.com
    address: 1462-7, HCNBUILDING, Seocho-dong, Seocho-gu, Seoul-si
    phone: +82-2-6712-1413
    fax-no: +82-2-525-9660
    country: KR
    changed: hostmaster@nida.or.kr 20090303
    mnt-by: MNT-KRNIC-AP
    source: APNIC

    inetnum: 112.72.128.0 - 112.72.255.255
    netname: HCN-KR
    descr: HYUNDAI COMMUNICATIONS & NETWORK
    country: KR
    admin-c: IA82-KR
    tech-c: IM82-KR
    status: ALLOCATED PORTABLE
    mnt-by: MNT-KRNIC-AP
    remarks: This information has been partially mirrored by APNIC from
    remarks: KRNIC. To obtain more specific information, please use the
    remarks: KRNIC whois server at whois.krnic.net.
    changed: hostmaster@nic.or.kr
    source: KRNIC
    whois 211.157.98.64 - China

    % [whois.apnic.net node-1]
    % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

    inetnum: 211.157.96.0 - 211.157.99.255
    netname: CHNCOMMIDC
    descr: CHINA COMMUNICATIONS SYSTEM CO.,LTD. INTERNET SERVICES BRANCH
    descr: INTERNET COMMUNICATIONS
    country: CN
    admin-c: GJ121-AP
    tech-c: WY152-AP
    status: ASSIGNED NON-PORTABLE
    mnt-by: MAINT-CNNIC-AP
    changed: ipas@cnnic.net.cn 20020910
    source: APNIC

    person: Guo Jinbo
    nic-hdl: GJ121-AP
    e-mail: ipmaster@cetc-chinacomm.com.cn
    address: NO.1 North Road of Workers Stadium, Chaoyang District, Beijing, China
    phone: +86-10-64169966
    fax-no: +86-10-64163632
    country: CN
    changed: wangjingying@cetc-chinacomm.com.cn 20031211
    mnt-by: MAINT-CNNIC-AP
    source: APNIC

    person: Wang Yongqiang
    nic-hdl: WY152-AP
    e-mail: ipmaster@cetc-chinacomm.com.cn
    address: NO.1 North Road of Workers Stadium, Chaoyang District, Beijing, China
    phone: +86-10-64163626
    fax-no: +86-10-64163632
    country: CN
    changed: wangjingying@cetc-chinacomm.com.cn 20031211
    mnt-by: MAINT-CNNIC-AP
    source: APNIC

    inetnum: 211.157.98.0 - 211.157.98.255
    netname: CHINACOMM
    country: CN
    descr: CECT-CHINACOMM BEIJING
    admin-c: CY4-CN
    tech-c: WD2-CN
    status: ASSIGNED NON-PORTABLE
    changed: ipmaster@cect-chinacomm.com 20080104
    mnt-by: MAINT-CN-CHINACOMM
    source: CNNIC

    person: Chen Yongbing
    nic-hdl: CY4-CN
    e-mail: nmc@95881.com
    address: Chaoyang District, Gongti North Road No.1,Beijing
    phone: +86-010-64169966
    fax-no: +86-010-64163632
    country: CN
    changed: ipmaster@cect-chinacomm.com 20070829
    mnt-by: MAINT-CN-CHINACOMM
    source: CNNIC

    person: Wang Duoguang
    nic-hdl: WD2-CN
    e-mail: nmc@95881.com
    address: Chaoyang District, Gongti North Road No.1,Beijing
    phone: +86-010-64169966
    fax-no: +86-010-64163632
    country: CN
    changed: ipmaster@cect-chinacomm.com 20070829
    mnt-by: MAINT-CN-CHINACOMM
    source: CNNIC
    whois 58.26.124.100 - Malasya

    % [whois.apnic.net node-1]
    % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

    inetnum: 58.26.0.0 - 58.27.127.255
    netname: TMNET-MY
    descr: TMnet TELEKOM MALAYSIA,
    descr: Level 25 (South), Menara Telekom, Jalan Pantai Baru,
    descr: 50672 Kuala Lumpur.
    country: MY
    admin-c: TA35-AP
    tech-c: TA35-AP
    status: ALLOCATED PORTABLE
    mnt-by: APNIC-HM
    mnt-lower: TM-NET-AP
    remarks: -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    remarks: This object can only be updated by APNIC hostmasters.
    remarks: To update this object, please contact APNIC
    remarks: hostmasters and include your organisation's account
    remarks: name in the subject line.
    remarks: -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    changed: hm-changed@apnic.net 20050303
    changed: hm-changed@apnic.net 20070209
    source: APNIC

    route: 58.26.64.0/18
    descr: TMnet route object
    origin: AS4788
    mnt-by: TM-NET-AP
    changed: roshime@tm.com.my 20090220
    source: APNIC

    role: TMNET IP Administrators
    address: TM Annexe 1,
    address: Jalan Pantai Baru,
    address: 50672 Kuala Lumpur.
    country: MY
    phone: +6-1800-88-2646
    phone: +603-83185434
    fax-no: +603-22402126
    trouble: dnsadm@tmnet.com.my
    e-mail: ipno@tm.net.my
    trouble: tm_osc@tmnet.com.my [TMDirect]
    trouble: ssc@tmnet.com.my [Streamyx]
    trouble: abuse@tm.net.my
    admin-c: AS115-AP
    tech-c: SM135-AP
    nic-hdl: TA35-AP
    mnt-by: TM-NET-AP
    changed: hm-changed@apnic.net 20070209
    source: APNIC
    BUENO ME CANSE, VOY POR LA MITAD DE LA LISTA jajaja

    CONCLUSION

    Tanto en mis pcs, como en los routers con ddwrt (linux) voy a cambiar varios users y passwords haciendolos mas seguros, tambien cambiare los puertos ssh y en los routers voy a desactivar el portfowarding, habilitandolo remotamente cuando sea necesario.

    Quiero aclarar aqui que esta posibilidad de ataques de multiples locaciones, puede deberse a que tengo un servicio DDNS sobre mi direccion ip. Asi que con un simple ataque al URL obtienen la ip
    Archivos adjuntos
    Tipo de archivo: rar ssh2.txt.rar (61.2 KB, 0 vistas)
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  • #2 Re: Ataque fuerzabruta a travez puerto 22 SSH

    ¿usas firewall? yo uso firestarter y es muy facil para configurar
    este es un test para saber que puertos están abiertos https://www.grc.com/x/ne.dll?bh0bkyd2
    siempre 2 contraseñas distintas (root y user)
    lo mejor es nunca tener habilitado sudo y usar su
    PD: con esta página podes saber, aproximadamente, la ubicación geográfica de una ip http://www.geoiptool.com/es
    saludos...
    Me gusta este mensaje
  • #3 Re: Ataque fuerzabruta a travez puerto 22 SSH

    Podes hacer varias cosas:
    1- Move el servicio algun puerto alto en vez de 22 ponelo arriba del 1024
    2- Deshabilita la posibilidad de ingresar como root
    3- Usa clave RSA

    Como proteccion:
    1-Permiti solamente la conexion desde un rango de direcciones
    2-Habilita alguna medida de proteccion tipo fail2ban

    Con estas medidas podes dormir tranquilo sin frazada.
    Me gusta este mensaje
  • #4 Re: Ataque fuerzabruta a travez puerto 22 SSH

    A mi me pasaba lo mismo y lo resolvi de esta forma
    iptables -I INPUT -p tcp --dport 22 -i eth0 -m state --state NEW -m recent --set
    iptables -I INPUT -p tcp --dport 22 -i eth0 -m state --state NEW -m recent --update --seconds 60 --hitcount 4 -j DROP
    de esta forma se denegaran la conexiones al puerto 22 a partir del 4 intento. y bloqueara la ip por 60 segundos.
    Saludos !!!
    Me gusta este mensaje

LinkBacks: http://www.psicofxp.com/forums/gnu-linux.50/972666-ataque-fuerzabruta-travez-puerto-22-ssh.html


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