0
I'm not a sysadmin, much less a RHEL sysadmin, but for some reason I have to make a few config changes in a couple RHEL servers.
I have to set up a couple services in different RHEL servers and they should be able to connect to each other. In one of them, the application server, I managed to open up port 8080 on iptables and it's accepting incoming connections from remote machines. But on the other one, the database server, I don't seem to be able to open up port 54321, which Monet DB is currently using, and I can connect to it only if I stop iptables.
Output of netstat -lnp:
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:2208 0.0.0.0:* LISTEN 4252/./hpiod
tcp 0 0 0.0.0.0:777 0.0.0.0:* LISTEN 3987/rpc.statd
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 3942/portmap
tcp 0 0 0.0.0.0:54321 0.0.0.0:* LISTEN 2792/monetdbd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 4273/sshd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 4285/cupsd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 4347/sendmail
tcp 0 0 127.0.0.1:2207 0.0.0.0:* LISTEN 4257/python
udp 0 0 0.0.0.0:771 0.0.0.0:* 3987/rpc.statd
udp 0 0 0.0.0.0:774 0.0.0.0:* 3987/rpc.statd
udp 1912 0 0.0.0.0:41740 0.0.0.0:* 2792/monetdbd
udp 0 0 0.0.0.0:48280 0.0.0.0:* 4469/avahi-daemon
udp 0 0 0.0.0.0:54321 0.0.0.0:* 2792/monetdbd
udp 0 0 0.0.0.0:5353 0.0.0.0:* 4469/avahi-daemon
udp 0 0 0.0.0.0:111 0.0.0.0:* 3942/portmap
udp 0 0 0.0.0.0:631 0.0.0.0:* 4285/cupsd
udp 0 0 10.1.1.152:123 0.0.0.0:* 4313/ntpd
udp 0 0 127.0.0.1:123 0.0.0.0:* 4313/ntpd
udp 0 0 0.0.0.0:123 0.0.0.0:* 4313/ntpd
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program name Path
unix 2 [ ACC ] STREAM LISTENING 10042 3348/iscsid @ISCSIADM_ABSTRACT_NAMESPACE
unix 2 [ ACC ] STREAM LISTENING 443552 2792/monetdbd /tmp/.s.monetdb.54321
unix 2 [ ACC ] STREAM LISTENING 443556 2792/monetdbd /tmp/.s.merovingian.54321
unix 2 [ ACC ] STREAM LISTENING 15085 4599/gam_server @/tmp/fam-root-
unix 2 [ ACC ] STREAM LISTENING 11367 4065/sdpd /var/run/sdp
unix 2 [ ACC ] STREAM LISTENING 14449 4411/xfs /tmp/.font-unix/fs7100
unix 2 [ ACC ] STREAM LISTENING 14994 4548/gdm-binary /tmp/.gdm_socket
unix 2 [ ACC ] STREAM LISTENING 443673 2806/mserver5 /home/pentaho/tumsdw/tumsdw/.mapi.sock
unix 2 [ ACC ] STREAM LISTENING 15024 4594/Xorg /tmp/.X11-unix/X0
unix 2 [ ACC ] STREAM LISTENING 11476 4136/pcscd /var/run/pcscd.comm
unix 2 [ ACC ] STREAM LISTENING 11507 4146/acpid /var/run/acpid.socket
unix 2 [ ACC ] STREAM LISTENING 13088 4049/python /var/run/setroubleshoot/setroubleshoot_server
unix 2 [ ACC ] STREAM LISTENING 13764 4285/cupsd /var/run/cups/cups.sock
unix 2 [ ACC ] STREAM LISTENING 10025 3342/iscsiuio @ISCSID_UIP_ABSTRACT_NAMESPACE
unix 2 [ ACC ] STREAM LISTENING 14629 4469/avahi-daemon /var/run/avahi-daemon/socket
unix 2 [ ACC ] STREAM LISTENING 14204 4373/gpm /dev/gpmctl
unix 2 [ ACC ] STREAM LISTENING 11533 4155/hald @/var/run/hald/dbus-ETzjGIzvFr
unix 2 [ ACC ] STREAM LISTENING 11532 4155/hald @/var/run/hald/dbus-8lZKbUmyAE
unix 2 [ ACC ] STREAM LISTENING 10262 3457/mcstransd /var/run/setrans/.setrans-unix
unix 2 [ ACC ] STREAM LISTENING 10659 3798/audispd /var/run/audispd_events
unix 2 [ ACC ] STREAM LISTENING 11238 4037/dbus-daemon /var/run/dbus/system_bus_socket
And content of /etc/sysconfig/iptables:
# Generated by iptables-save v1.3.5 on Wed Oct 29 17:00:09 2014
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [105:16246]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -i eth0 -p tcp -m tcp --dport 54321 -j ACCEPT
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p esp -j ACCEPT
-A RH-Firewall-1-INPUT -p ah -j ACCEPT
-A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Wed Oct 29 17:00:09 2014
# Generated by iptables-save v1.3.5 on Wed Oct 29 17:00:09 2014
*nat
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [2:170]
:OUTPUT ACCEPT [2:170]
COMMIT
# Completed on Wed Oct 29 17:00:09 2014
As far as I can tell, this config matches exactly the other server's (apart the change from port 8080 to 54321), but with iptables started I can't connect to it remotely (I can connect locally without issue, though).
Any thoughts?
nsousa
Posted 2014-10-30T10:12:28.813
Reputation: 103
