[uylug-varios] Problema raro de conexion entre dos maquinas
Dante Castiglione M.
dac.maldonado at gmail.com
Fri Apr 29 11:50:39 PDT 2016
Que raro... Como parte del procedimiento de instalacion de la DB lo habia
desabilitado, pero ahora ante tu pregunta lo revise y esta habilitado de
nuevo... Quizas lo hice en el cliente.
[usuario at server ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 28
[usuario at server ~]# cat /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=enforcing
# SELINUXTYPE= can take one of three two values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes
are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
ahora lo deshabilite
[usuario at server ~]# cat /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
#SELINUX=enforcing
SELINUX=disabled
# SELINUXTYPE= can take one of three two values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes
are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
no cambia nada
[usuario at cliente ~]$ psql -h 192.168.1.43 -U dbuser dbname
psql: could not connect to server: No route to host
Is the server running on host "192.168.1.43" and accepting
TCP/IP connections on port 5432?
[usuario at cliente ~]$ telnet 192.168.1.43 5432
Trying 192.168.1.43...
telnet: connect to address 192.168.1.43: No route to host
sera que no esta bien mi archivo hosts ?
este es el del clliente
192.168.1.43 mdw.southx.io
fe80::1a4f:32ff:feca:297d mdw.southx.io
127.0.0.1 localhost localhost.localdomain
localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain
localhost6 localhost6.localdomain6
127.0.0.1 cliente.southx.io
::1 cliente.southx.io
y este es el del server
127.0.0.1 mdw.southx.io
::1 mdw.southx.io
192.168.1.43 mdw.southx.io
fe80::1a4f:32ff:feca:297d mdw.southx.io
127.0.0.1 sdw1.southx.io
::1 sdw1.southx.io
127.0.0.1 sdw2.southx.io
::1 sdw2.southx.io
192.168.1.42 fatima.southx.io
127.0.0.1 localhost localhost.localdomain
localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain
localhost6 localhost6.localdomain6
---------------------------------------------
*SouthX*
https://southx.io
BigData
*Digicoins*
https://digicoins.cash <https://southx.io/>
Bitcoin
Dante Castiglione Maldonado
dac.maldonado at gmail.com
---------------------------------------------
On 29 April 2016 at 15:42, Enrique Verdes <emverdes at ieee.org> wrote:
> Mandá la salida del comando sestatus
>
>
>
> 2016-04-29 15:19 GMT-03:00 Kenneth Irving <ken at fq.edu.uy>:
>
>> ¿No será alguna restricción de SELinux?
>>
>> saludos
>>
>> Kenneth
>>
>>
>> On Fri, 29 Apr 2016, Dante Castiglione M. wrote:
>>
>>
>>> Muchas gracias por sus amables respuestas.
>>>
>>> ------------------------------------
>>> 1. telnet
>>> ------------------------------------
>>>
>>> Hice el telnet correctamente desde el CentOS cliente, el resultado no
>>> cambia
>>>
>>> [usuario at cliente ~]$ telnet 192.168.1.43 5432
>>> Trying 192.168.1.43...
>>> telnet: connect to address 192.168.1.43: No route to host
>>>
>>> Por si acaso lo repeti desde el cliente en Ubuntu, hace lo mismo
>>>
>>> usuario at cliente:~$ telnet 192.168.1.43 5432
>>> Trying 192.168.1.43...
>>> telnet: Unable to connect to remote host: No route to host
>>>
>>>
>>> ------------------------------------
>>> 2. server
>>> ------------------------------------
>>>
>>> ifconfig del server
>>>
>>> [usuario at server ~]# ifconfig
>>> lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
>>> inet 127.0.0.1 netmask 255.0.0.0
>>> inet6 ::1 prefixlen 128 scopeid 0x10<host>
>>> loop txqueuelen 0 (Local Loopback)
>>> RX packets 756 bytes 127594 (124.6 KiB)
>>> RX errors 0 dropped 0 overruns 0 frame 0
>>> TX packets 756 bytes 127594 (124.6 KiB)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>>
>>> p1p1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
>>> ether 20:47:47:3c:5b:bd txqueuelen 1000 (Ethernet)
>>> RX packets 0 bytes 0 (0.0 B)
>>> RX errors 0 dropped 0 overruns 0 frame 0
>>> TX packets 0 bytes 0 (0.0 B)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>>
>>> virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
>>> inet 192.168.122.1 netmask 255.255.255.0 broadcast
>>> 192.168.122.255
>>> ether 52:54:00:a4:bc:6e txqueuelen 0 (Ethernet)
>>> RX packets 0 bytes 0 (0.0 B)
>>> RX errors 0 dropped 0 overruns 0 frame 0
>>> TX packets 0 bytes 0 (0.0 B)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>>
>>> wlp6s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>>> inet 192.168.1.43 netmask 255.255.255.0 broadcast 192.168.1.255
>>> inet6 fe80::1a4f:32ff:feca:297d prefixlen 64 scopeid 0x20<link>
>>> ether 18:4f:32:ca:29:7d txqueuelen 1000 (Ethernet)
>>> RX packets 12450 bytes 8049799 (7.6 MiB)
>>> RX errors 0 dropped 0 overruns 0 frame 0
>>> TX packets 7794 bytes 1254229 (1.1 MiB)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>>
>>>
>>> ip tables del server
>>>
>>> [usuario at server ~]# service iptables status
>>> Redirecting to /bin/systemctl status iptables.service
>>> ● iptables.service
>>> Loaded: not-found (Reason: No such file or directory)
>>> Active: inactive (dead)
>>>
>>>
>>> ------------------------------------
>>> 3. cliente
>>> ------------------------------------
>>>
>>> ifconfig del ciente
>>>
>>> [usuario at cliente ~]$ ifconfig
>>> enp9s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
>>> ether a4:ba:db:b7:0b:08 txqueuelen 1000 (Ethernet)
>>> RX packets 0 bytes 0 (0.0 B)
>>> RX errors 0 dropped 0 overruns 0 frame 0
>>> TX packets 0 bytes 0 (0.0 B)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>> device interrupt 18
>>>
>>> lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
>>> inet 127.0.0.1 netmask 255.0.0.0
>>> inet6 ::1 prefixlen 128 scopeid 0x10<host>
>>> loop txqueuelen 0 (Local Loopback)
>>> RX packets 10 bytes 756 (756.0 B)
>>> RX errors 0 dropped 0 overruns 0 frame 0
>>> TX packets 10 bytes 756 (756.0 B)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>>
>>> virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
>>> inet 192.168.122.1 netmask 255.255.255.0 broadcast
>>> 192.168.122.255
>>> ether 52:54:00:53:ac:c9 txqueuelen 0 (Ethernet)
>>> RX packets 0 bytes 0 (0.0 B)
>>> RX errors 0 dropped 0 overruns 0 frame 0
>>> TX packets 0 bytes 0 (0.0 B)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>>
>>> wlp12s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>>> inet 192.168.1.42 netmask 255.255.255.0 broadcast 192.168.1.255
>>> inet6 fe80::e60:76ff:fe2f:29d9 prefixlen 64 scopeid 0x20<link>
>>> ether 0c:60:76:2f:29:d9 txqueuelen 1000 (Ethernet)
>>> RX packets 18 bytes 2027 (1.9 KiB)
>>> RX errors 0 dropped 0 overruns 0 frame 20284
>>> TX packets 42 bytes 5704 (5.5 KiB)
>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>> device interrupt 17 base 0xc000
>>>
>>>
>>> iptables del cliente
>>>
>>> [usuario at cliente ~]# service iptables status
>>> Redirecting to /bin/systemctl status iptables.service
>>> ● iptables.service
>>> Loaded: not-found (Reason: No such file or directory)
>>> Active: inactive (dead)
>>>
>>>
>>> ------------------------------------
>>> 4. netstat y nap
>>> ------------------------------------
>>>
>>> netstat en el server, muestra el puerto 5432 abierto, no se si
>>> correctamente
>>>
>>> [usuario at server ~]# netstat -nltp | grep 5432
>>> tcp 0 0 0.0.0.0:5432 0.0.0.0:*
>>> LISTEN 6642/postgres
>>> tcp6 0 0 :::5432 :::*
>>> LISTEN 6642/postgres
>>>
>>>
>>>
>>> nmap desde el cliente, aca parece haber algo raro porque ve otros
>>> puertos pero no el 5432
>>>
>>> [usuario at cliente ~]# nmap 192.168.1.43
>>>
>>> Starting Nmap 6.40 ( http://nmap.org ) at 2016-04-29 14:48 UYT
>>> Nmap scan report for mdw.southx.io (192.168.1.43)
>>> Host is up (0.018s latency).
>>> Not shown: 997 filtered ports
>>> PORT STATE SERVICE
>>> 22/tcp open ssh
>>> 139/tcp closed netbios-ssn
>>> 445/tcp closed microsoft-ds
>>> MAC Address: 18:4F:32:CA:29:7D (Unknown)
>>>
>>> Nmap done: 1 IP address (1 host up) scanned in 6.83 seconds
>>>
>>>
>>> ------------------------------------
>>>
>>> No entiendo porque no lo ve si el nmap lo muestra abierto
>>> Podra ser porque esta con 0.0.0.0 y no especificamente con 192.168.1.43
>>> ???
>>>
>>> Desde ya muchas gracias
>>>
>>> ------------------------------------
>>>
>>>
>>>
>>> ---------------------------------------------
>>>
>>> SouthX
>>> https://southx.io
>>> BigData
>>>
>>> Digicoins
>>> https://digicoins.cash
>>> Bitcoin
>>>
>>> Dante Castiglione Maldonado
>>> dac.maldonado at gmail.com
>>>
>>> ---------------------------------------------
>>>
>>>
>>> On 29 April 2016 at 11:08, Eduardo Trápani <etrapani at gmail.com> wrote:
>>>
>>> > Tengo dos maquinas en la wifi, las dos con CentOS 7
>>> > 192.168.1.43 (DB server) y 192.168.1.42 (DB client)
>>> >
>>> > ping responde bien en ambos sentidos
>>> > en ambas maquinas iptables service dice inactive (dead)
>>>
>>> ¿Podés pegar la salida de ifconfig en ambos equipos?
>>>
>>> Eduardo.
>>> _______________________________________________
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>>> Uylug-varios at listas.uylug.org.uy
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>>>
>>>
>>>
>>>
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>>
>
>
> --
> Enrique M. Verdes
> <https://uy.linkedin.com/pub/enrique-verdes/1/794/ba8>
>
> "As we enjoy great advantages from the inventions of others, we should be
> glad of an opportunity to serve others by any invention of ours; and this
> we should do freely and generously."
>
> Benjamin Franklin
>
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