로그인 창이 안뜨네요 ?? [1]

Redhat 8.0에서 세팅중인데요
FAQ를 보고 하라는데로 수정을 했는데 x browser에서 실행시키면
로그인 창이 안뜨네요...

xmanager.log에 이렇게 나오는데 문제가 있는건가요?
...........
Xdmcp Request Address: 192.168.123.123
Xdmcp Connection Address 0: 192.168.123.176
Xdmcp: sent a REQUEST message
Xdmcp: received an ACCEPT message
Xdmcp: sent a MANAGE message.
Xdmcp: Timed out, state 8. Retransmissions: 0
Xdmcp: sent a MANAGE message.
Xdmcp: Timed out, state 8. Retransmissions: 1
Xdmcp: sent a MANAGE message.
Xdmcp: Timed out, state 8. Retransmissions: 2
Xdmcp: sent a MANAGE message.
Xdmcp: Timed out, state 8. Retransmissions: 3
XDM go to sleep: too many retransmissions
User forces server termination.
Terminate at server reset is active.
X server was terminated normally.

안녕하세요?

현재 서버와 PC사이에 방화벽이 존재하는 것 같습니다.

FAQ 내용을 참고하여 방화벽을 제거해주세요. (FAQ바로가기)

감사합니다.