Record the problem of system firewall in the relocation of computer room

Yesterday night carried out the engine room relocation, in the new Room a red Hat virtualization started when the discovery, one of the nodes network is not through,

Guess the reason may be the problem of the network cable, and then re-do a new network cable, or networks do not pass, with the test cable, found that the network cable is not a problem,

So guess is not the problem of the switch, so check the switch, found the switch port settings, VLAN settings are normal.

Due to the normal use of the system during the day, we decided to put the problem first, let the system normal use up, we go back to rest, to the night to deal with.

Just now went to the computer room, the network cable again check, the switch also checked, found that the fault node and other nodes of the network is one-way through, call colleagues to consult,

Colleagues to remind the system firewall will not have a problem, so hurriedly check the discovery System Firewall is really open, shut down the firewall in the test, network all normal,

Quickly activate the node and log the logs.

Record the problem of system firewall in the relocation of computer room