Network is unreachable [RESOLVIDO]

nilsonuehara
(usa Ubuntu)

Enviado em 08/04/2014 - 11:48h

Instalei o Vesta no meu Ubuntu 13.04 x32 e quando tento enviar e-mails, recebo o erro no log (/var/log/exim4/mainlog):

2014-04-08 11:41:59 1WW4bC-0008Om-0I == nxxx@gmail.com R=dnslookup T=remote_smtp defer (101): Network is unreachable
2014-04-08 11:41:59 1WWpOH-0004fL-2R == bounce-mc.us3_24286051.272073-nxxx=aeroboteco.com.br@mail21.wdc03.rsgsv.net R=dnslookup T=remote_smtp defer (-53): retry time not
reached for any host
2014-04-08 14:55:24 1WXXQq-0002Xl-Kc <= nxxx@aeroboteco.com.br U=admin P=local S=592 id=985a0d807f2a3dcb958c5595bbb0feaf@aeroboteco.com.br
2014-04-08 14:57:32 1WXXQq-0002Xl-Kc mx.uol.com.br [200.147.36.15] Connection timed out
2014-04-08 14:57:32 1WXXQq-0002Xl-Kc == nxxx@uol.com.br R=dnslookup T=remote_smtp defer (110): Connection timed out

Fiz um teste via telnet:
telnet alt1.gmail-smtp-in.l.google.com 25

e retorna:
Trying 173.194.66.27...
Trying 2a00:1450:400c:c03::1a...
telnet: Unable to connect to remote host: Network is unreachable


O que pode estar errado?

Obs: Este é um servidor da Digital Ocean

Já tentei desativar o IPV6 seguindo o tutorial http://pt.kioskea.net/faq/5226-linux-ubuntu-desativar-o-suporte-ipv6 e rebootei o servidor mas o problema persiste.

Outras informações:
#route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 162.243.224.1 0.0.0.0 UG 0 0 0 eth0
162.243.224.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

#traceroute -n 173.194.66.27
traceroute to 173.194.66.27 (173.194.66.27), 30 hops max, 60 byte packets
1 107.170.1.253 8.473 ms 8.467 ms 8.458 ms
2 192.241.164.241 2.495 ms 2.484 ms 2.460 ms
3 192.241.164.250 0.230 ms 0.260 ms 0.246 ms
4 62.115.35.101 0.299 ms 0.282 ms 0.266 ms
5 80.91.254.37 0.649 ms 80.91.254.33 0.246 ms 213.155.133.10 0.229 ms
6 80.91.249.28 99.797 ms 80.91.249.20 82.312 ms 82.303 ms
7 213.155.136.49 91.981 ms 62.115.136.173 101.904 ms 213.155.136.49 91.940 ms
8 62.115.136.21 92.013 ms 62.115.136.35 96.527 ms 62.115.136.37 97.223 ms
9 213.248.93.198 111.420 ms 111.697 ms 107.202 ms
10 216.239.43.122 103.457 ms 209.85.250.192 107.518 ms *
11 209.85.254.31 111.630 ms 209.85.254.33 108.951 ms 209.85.254.31 107.384 ms
12 72.14.232.95 114.274 ms 209.85.254.153 109.769 ms 105.431 ms
13 216.239.47.11 100.831 ms 96.531 ms 209.85.244.209 100.685 ms
14 209.85.251.231 98.643 ms 72.14.238.215 100.777 ms 100.923 ms
15 * * *
16 173.194.66.27 100.660 ms 96.482 ms 96.408 ms

ricardoolonca
(usa Debian)

Enviado em 08/04/2014 - 17:05h

Tem algum firewall bloqueando a porta 25? Alguns provedores bloqueiam essa porta.

nilsonuehara
(usa Ubuntu)

Enviado em 08/04/2014 - 17:23h

Não


# iptables -L -v -n
Chain INPUT (policy ACCEPT 2181 packets, 2677K bytes)
pkts bytes target prot opt in out source destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain OUTPUT (policy ACCEPT 2117 packets, 552K bytes)
pkts bytes target prot opt in out source destination


# iptables -t nat -L -v -n
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

# nmap -sT -PN mx.uol.com.br

Starting Nmap 6.00 ( http://nmap.org ) at 2014-04-08 18:21 UTC
Nmap scan report for mx.uol.com.br (200.147.36.15)
Host is up.
rDNS record for 200.147.36.15: 200-147-36-15.static.uol.com.br
All 1000 scanned ports on mx.uol.com.br (200.147.36.15) are filtered

Nmap done: 1 IP address (1 host up) scanned in 201.63 seconds

nilsonuehara
(usa Ubuntu)

Enviado em 09/04/2014 - 11:20h

Finalmente,
obtive a resposta do suporte técnico da Digital Ocean e eles confirmaram que havia um bloqueio do protocolo SMTP. >:(
O mais legal é que logo de cara no FAQ deles consta:

Do you have a default firewall enabled?
No — you can open and use any port you require.

ricardoolonca
(usa Debian)

Enviado em 09/04/2014 - 14:25h

Ótimo.

Por favor, marque o tópico como solucionado.