Como ativar o ping desta rede?

Question

Eu tenho duas redes

192.168.0.0/24 which is my home network
10.2.0.0/24  which is the second network dedicated to vm's

Sem firewall eu posso pingar todas as redes sem problemas

Client System é: Slackware 14.2 com ip 192.168.0.2 Servidor é OmniOS com ip 10.2.0.1 (bge1) e 192.168.0.30 (bge0)

/etc/rc.d/rc.firewall stop
ping 10.2.0.1
PING 10.2.0.1 (10.2.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.30: icmp_seq=1 ttl=255 time=4.34 ms
64 bytes from 192.168.0.30: icmp_seq=2 ttl=255 time=4.81 ms

Ele responde a 192.168.0.30, porque a rede 10.2.0.0/24 é chamada para permitir que o vm alcance a internet.

Com o firewall ativo

/etc/rc.d/rc.firewall start
    ping 10.2.0.1

Nenhuma resposta. E syslog disse ..

Apr  8 12:03:58 slack64 kernel: [22092.913008] IN=bridge0 OUT= MAC=************* SRC=192.168.0.30 DST=192.168.0.2 LEN=84 TOS=0x00 PREC=0x00 TTL=255 ID=31255 DF PROTO=ICMP TYPE=0 CODE=0 ID=12441 SEQ=5 
Apr  8 12:03:59 slack64 kernel: [22093.935986] IN=bridge0 OUT= MAC=************* SRC=192.168.0.30 DST=192.168.0.2 LEN=84 TOS=0x00 PREC=0x00 TTL=255 ID=31256 DF PROTO=ICMP TYPE=0 CODE=0 ID=12441 SEQ=6 

Meu firewall é esse script.

#!/bin/sh
# A simple script firewall
set -e

# We need this for redirection
echo 1 > /proc/sys/net/ipv4/ip_forward

firewall_start() {

# Clean first
iptables -F
iptables -X
iptables -Z
iptables -t nat -F
iptables -t nat -X
iptables -t nat -Z
iptables -t mangle -F
iptables -t mangle -X
iptables -t mangle -Z
iptables -t raw -F
iptables -t raw -X
iptables -t raw -Z

# Default policy
iptables -P OUTPUT ACCEPT
iptables -P INPUT DROP
iptables -P FORWARD DROP

# firewall rules INPUT
iptables -A INPUT -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -i lo -j ACCEPT

# Bacula
iptables -A INPUT -s 192.168.0.0/24 -p tcp -m tcp --dport 9102:9104 -j ACCEPT

# Ssh 
iptables -A INPUT  -p tcp -m tcp --dport 22 -j ACCEPT

# Icmp
iptables -A INPUT -p icmp -m icmp --icmp-type 0 -s 0/0 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -p icmp -m icmp --icmp-type 8 -s 0/0 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT

# Log on syslog
iptables -A INPUT -j LOG
iptables -A FORWARD -j LOG

# Final input rules
iptables -A INPUT -j REJECT --reject-with icmp-host-prohibited
iptables -A FORWARD -j REJECT --reject-with icmp-host-prohibited
}

firewall_stop() {
# Clean
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -F
iptables -X
iptables -Z
iptables -t nat -F
iptables -t nat -X
iptables -t nat -Z
iptables -t mangle -F
iptables -t mangle -X
iptables -t mangle -Z
iptables -t raw -F
iptables -t raw -X
iptables -t raw -Z

}


firewall_restart() {
firewall_stop
firewall_start
}

case "$1" in
'start')
  firewall_start
  ;;
'stop')
  firewall_stop
  ;;
'restart')
  firewall_restart
  ;;
*)
  echo "usage $0 start|stop|restart"
esac

E este é o ipf.conf do servidor

# block and quick everything by default but pass on lo0
block in log on bge0 all
pass in quick on lo0 all

# These rules will allow connections initiated from
# this host along with the return connection
pass out quick proto icmp all keep state
pass out quick proto tcp all keep state
pass out quick proto udp all keep state

# Allow SecureShell incoming connections on 2122 port 
pass in quick proto tcp from any to any port = 2122 flags S keep state keep frags

# Allow SecureShell incoming connections on 22 port 
pass in quick proto tcp from any to any port = 22 flags S keep state keep frags

# Allow Secure stunnel telnet  incoming connections on 5860 port 
pass in quick proto tcp from any to any port = 5860 flags S keep state keep frags

# Allow nfs 3 4
pass in quick proto tcp from 192.168.0.0/24 to any port = 2049  flags S keep state keep frags
pass in quick   proto udp from 192.168.0.0/24 to any port = 2049 keep state
pass in quick proto tcp from 192.168.0.0/24 to any port = 4001  flags S keep state keep frags
pass in quick   proto udp from 192.168.0.0/24 to any port = 4001 keep state
pass in quick proto tcp from 192.168.0.0/24 to any port = 111   flags S keep state keep frags
pass in quick   proto udp from 192.168.0.0/24 to any port = 111 keep state
pass in quick proto tcp from 192.168.0.0/24 to any port = 48472 flags S keep state keep frags
pass in quick   proto udp from 192.168.0.0/24 to any port = 48472 keep state
pass in quick proto tcp from 192.168.0.0/24 to any port = 8932 flags S keep state keep frags
pass in quick   proto udp from 192.168.0.0/24 to any port = 8932 keep state

#Allow PING
pass in quick proto icmp from any to any keep state

# Samba
pass in quick proto udp from 192.168.0.0/24 to any port = 137 keep state
pass in quick proto udp from 192.168.0.0/24 to any port = 138 keep state
pass in quick proto udp from 192.168.0.0/24 to any port = 139 keep state
pass in quick proto udp from 192.168.0.0/24 to any port = 445 keep state
pass in quick proto tcp from 192.168.0.0/24 to any port = 137 flags S keep state keep frags
pass in quick proto tcp from 192.168.0.0/24 to any port = 138 flags S keep state keep frags
pass in quick proto tcp from 192.168.0.0/24 to any port = 139 flags S keep state keep frags
pass in quick proto tcp from 192.168.0.0/24 to any port = 445 flags S keep state keep frags

# Dns
pass in quick proto udp from 192.168.0.0/24 to any port = 53 keep state
pass in quick proto tcp from 192.168.0.0/24 to any port = 53 flags S keep state keep frags

O que posso fazer para ativar o ping?

    

Answer 1

Outro usuário em outro fórum encontrou o problema, o firewall foi mal configurado. Com este script funciona tudo bem.

#!/bin/sh
#a simple script firewall

# We need this for redirection
echo 1 > /proc/sys/net/ipv4/ip_forward

firewall_start() {
# Clean
iptables -F
iptables -X
iptables -Z
iptables -t nat -F
iptables -t nat -X
iptables -t nat -Z
iptables -t mangle -F
iptables -t mangle -X
iptables -t mangle -Z

# firewall rules INPUT
iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -i lo -j ACCEPT

# X11
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 6000 -j ACCEPT

# Vdr
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 3000 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 2000 -j ACCEPT

# Samba
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 137 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 137 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 138 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 138 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 139 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 139 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 445 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 445 -j ACCEPT

# Mail
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 25 -j ACCEPT

# Print
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 631 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 631 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 515 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 515 -j ACCEPT

# Nfs
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 111 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 111 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 662 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 662 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 2049 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 2049 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 4001 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 4001 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 32768 -j ACCEPT 
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 32768 -j ACCEPT 

# Ssh 
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 2122 -j ACCEPT

# Ftp
iptables -A INPUT  -p tcp --sport 20 -m state --state ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --dport 20 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT  -p tcp --sport 21 -m state --state ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --dport 21 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT  -p tcp --sport 2121 -m state --state ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --dport 2121 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 60000:65535 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 60000:65535 -j ACCEPT

# Secure telnet
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 5859 -j ACCEPT

# Ktorrent
iptables -A INPUT -s 192.168.0.0/24 -p tcp  --dport 54233:54234 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -p udp  --dport 54233:54234 -j ACCEPT

# Firewall rules NAT/OUTPUT
iptables -t nat -A PREROUTING -s 192.168.0.0/24  -p tcp --dport 21 -j REDIRECT --to-port 2121
iptables -t nat -A OUTPUT -s 192.168.0.0/24  -p tcp -o lo --dport 21 -j REDIRECT --to-port 2121
iptables -t nat -A PREROUTING -s 192.168.0.0/24 -p tcp --dport 22 -j REDIRECT --to-ports 2122
iptables -t nat -A OUTPUT -s 192.168.0.0/24 -p tcp -o lo --dport 22 -j REDIRECT --to-ports 2122

# Icmp
iptables -A INPUT -p icmp --icmp-type 0 -j ACCEPT

# Log
#iptables -A INPUT -j LOG
#iptables -A FORWARD -j LOG

#Final rules
iptables -A INPUT -j REJECT --reject-with icmp-host-prohibited
iptables -A FORWARD -j REJECT --reject-with icmp-host-prohibited
}

firewall_stop() {
# Clean
iptables -F
iptables -X
iptables -Z
iptables -t nat -F
iptables -t nat -X
iptables -t nat -Z
iptables -t mangle -F
iptables -t mangle -X
iptables -t mangle -Z
}


firewall_restart() {
firewall_stop
firewall_start
}

case "$1" in
'start')
  firewall_start
  ;;
'stop')
  firewall_stop
  ;;
'restart')
  firewall_restart
  ;;
*)
  echo "usage $0 start|stop|restart"
esac