howart
asked on
"How to detect what is blocking my tcp/143 port"
"How to detect what is blocking my tcp/143 port"
My tcp/143 port is blocked on my windows 2003 server. telnet host 143 to any host results in:
Connecting To host name...Could not open connection to the host, on port 143: Connect failed
From another client this is no problem.
Connecting from the server to another port is no problem
Somehow tcp/143 got blocked on the server.
Windows Firewall is not running
There are no tcp filters active on the network interfaces
There are no third party network filters installed?
So it is a mystery to me.
Is there a utility with which I can trace what is dropping/denying tcp/143 on the server?
Does anyone have an idea what it could be blocking?
My tcp/143 port is blocked on my windows 2003 server. telnet host 143 to any host results in:
Connecting To host name...Could not open connection to the host, on port 143: Connect failed
From another client this is no problem.
Connecting from the server to another port is no problem
Somehow tcp/143 got blocked on the server.
Windows Firewall is not running
There are no tcp filters active on the network interfaces
There are no third party network filters installed?
So it is a mystery to me.
Is there a utility with which I can trace what is dropping/denying tcp/143 on the server?
Does anyone have an idea what it could be blocking?
ASKER CERTIFIED SOLUTION
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Well first of all, do you have any service listening on port 143/tcp? The port is for IMAP, do you have Exchange or some other email server software installed and running?
ASKER
no listners:
netstat -abv -p tcp
\>netstat -av -p tcp
tive Connections
Proto Local Address Foreign Address State
TCP SQL-POPPERS:ftp SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:smtp SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:http SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:sunrpc SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:epmap SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:microsoft-ds SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:624 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:626 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1039 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1047 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1048 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1054 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1064 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1068 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1069 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1076 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1099 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1288 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:1311 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:2049 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:3052 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:ms-wbt-server SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:6050 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:8000 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:8098 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:8099 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:16109 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:41523 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:netbios-ssn SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:microsoft-ds TS-POPPERS:3004 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 1778 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 1846 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 1855 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 4109 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 4110 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 4157 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 4669 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 4690 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local: 4704 ESTABLISHED
TCP SQL-POPPERS:1778 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:1846 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:1855 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:2108 PDC-POPPERS:epmap TIME_WAIT
TCP SQL-POPPERS:2109 PDC-POPPERS:1026 TIME_WAIT
TCP SQL-POPPERS:4103 MSX-POPPERS:1026 ESTABLISHED
TCP SQL-POPPERS:4106 MSX-POPPERS:28780 ESTABLISHED
TCP SQL-POPPERS:4109 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:4110 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:4157 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:4669 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:4690 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:4704 SQL-POPPERS.poppers.local: ms-sql-s ESTABLI
TCP SQL-POPPERS:microsoft-ds SQL-POPPERS.poppers.local: 4656 ESTABLIS
TCP SQL-POPPERS:3656 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:4656 SQL-POPPERS.poppers.local: microsoft- ds EST
D
TCP SQL-POPPERS:12080 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:12110 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:12119 SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:http wks-mueller.poppers-senco. local:4002 ESTAB
TCP SQL-POPPERS:http pc-buiten01:2613 ESTABLISHED
TCP SQL-POPPERS:http pc-buiten01:2615 ESTABLISHED
TCP SQL-POPPERS:netbios-ssn SQL-POPPERS.poppers.local: 0 LISTENING
TCP SQL-POPPERS:netbios-ssn pc-tyt-dickt02.poppers.loc al:1721 ESTABL
TCP SQL-POPPERS:microsoft-ds pc-tb.poppers.local:1519 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pcmarketing.poppers.local: 1066 ESTABLIS
TCP SQL-POPPERS:microsoft-ds labtop-henk.poppers.local: 2093 ESTABLIS
TCP SQL-POPPERS:microsoft-ds laptop-muijs.poppers.local :1507 ESTABLI
TCP SQL-POPPERS:microsoft-ds pcadm06.poppers.local:1130 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pcwal06.poppers.local:1793 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pcwal02.poppers.local:2847 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pc-buiten01:2137 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pczim02.poppers.local:1057 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pcvrk01.poppers.local:1128 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pcink02.poppers.local:1180 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pcvrk05.poppers.local:1071 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pc-curs04.poppers.local:kp op ESTABLISHE
TCP SQL-POPPERS:microsoft-ds pcroelof.poppers.local:107 7 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pczim01.poppers.local:2196 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pc-curs02.poppers.local:10 68 ESTABLISHE
TCP SQL-POPPERS:ms-sql-s pcmarketing.poppers.local: 2191 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcmarketing.poppers.local: 3397 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s laptop-muijs.poppers.local :1627 ESTABLISHE
TCP SQL-POPPERS:ms-sql-s laptop-muijs.poppers.local :1635 ESTABLISHE
TCP SQL-POPPERS:ms-sql-s laptop-muijs.poppers.local :1960 ESTABLISHE
TCP SQL-POPPERS:ms-sql-s pcwal06.poppers.local:1118 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcwal02.poppers.local:1163 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcwal02.poppers.local:4299 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcvrk06.poppers.local:1120 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcvrk03.poppers.local:1154 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcvrk03.poppers.local:1652 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcvrk04.poppers.local:1112 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcvrk09.poppers.local:1100 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pcvrk09.poppers.local:2141 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pc-ink09.poppers.local:110 5 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pc-ink09.poppers.local:279 8 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:1126 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:2026 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:2075 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:2238 ESTABLISHED
TCP SQL-POPPERS:ms-wbt-server labtop-henk.poppers.local: 1799 ESTABLI
ok
netstat -abv -p tcp
\>netstat -av -p tcp
tive Connections
Proto Local Address Foreign Address State
TCP SQL-POPPERS:ftp SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:smtp SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:http SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:sunrpc SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:epmap SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:microsoft-ds SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:624 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:626 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1039 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1047 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1048 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1054 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1064 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1068 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1069 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1076 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1099 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1288 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1311 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:2049 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:3052 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-wbt-server SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:6050 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:8000 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:8098 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:8099 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:16109 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:41523 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:netbios-ssn SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:microsoft-ds TS-POPPERS:3004 ESTABLISHED
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:ms-sql-s SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1778 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1846 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:1855 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:2108 PDC-POPPERS:epmap TIME_WAIT
TCP SQL-POPPERS:2109 PDC-POPPERS:1026 TIME_WAIT
TCP SQL-POPPERS:4103 MSX-POPPERS:1026 ESTABLISHED
TCP SQL-POPPERS:4106 MSX-POPPERS:28780 ESTABLISHED
TCP SQL-POPPERS:4109 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:4110 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:4157 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:4669 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:4690 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:4704 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:microsoft-ds SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:3656 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:4656 SQL-POPPERS.poppers.local:
D
TCP SQL-POPPERS:12080 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:12110 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:12119 SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:http wks-mueller.poppers-senco.
TCP SQL-POPPERS:http pc-buiten01:2613 ESTABLISHED
TCP SQL-POPPERS:http pc-buiten01:2615 ESTABLISHED
TCP SQL-POPPERS:netbios-ssn SQL-POPPERS.poppers.local:
TCP SQL-POPPERS:netbios-ssn pc-tyt-dickt02.poppers.loc
TCP SQL-POPPERS:microsoft-ds pc-tb.poppers.local:1519 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pcmarketing.poppers.local:
TCP SQL-POPPERS:microsoft-ds labtop-henk.poppers.local:
TCP SQL-POPPERS:microsoft-ds laptop-muijs.poppers.local
TCP SQL-POPPERS:microsoft-ds pcadm06.poppers.local:1130
TCP SQL-POPPERS:microsoft-ds pcwal06.poppers.local:1793
TCP SQL-POPPERS:microsoft-ds pcwal02.poppers.local:2847
TCP SQL-POPPERS:microsoft-ds pc-buiten01:2137 ESTABLISHED
TCP SQL-POPPERS:microsoft-ds pczim02.poppers.local:1057
TCP SQL-POPPERS:microsoft-ds pcvrk01.poppers.local:1128
TCP SQL-POPPERS:microsoft-ds pcink02.poppers.local:1180
TCP SQL-POPPERS:microsoft-ds pcvrk05.poppers.local:1071
TCP SQL-POPPERS:microsoft-ds pc-curs04.poppers.local:kp
TCP SQL-POPPERS:microsoft-ds pcroelof.poppers.local:107
TCP SQL-POPPERS:microsoft-ds pczim01.poppers.local:2196
TCP SQL-POPPERS:microsoft-ds pc-curs02.poppers.local:10
TCP SQL-POPPERS:ms-sql-s pcmarketing.poppers.local:
TCP SQL-POPPERS:ms-sql-s pcmarketing.poppers.local:
TCP SQL-POPPERS:ms-sql-s laptop-muijs.poppers.local
TCP SQL-POPPERS:ms-sql-s laptop-muijs.poppers.local
TCP SQL-POPPERS:ms-sql-s laptop-muijs.poppers.local
TCP SQL-POPPERS:ms-sql-s pcwal06.poppers.local:1118
TCP SQL-POPPERS:ms-sql-s pcwal02.poppers.local:1163
TCP SQL-POPPERS:ms-sql-s pcwal02.poppers.local:4299
TCP SQL-POPPERS:ms-sql-s pcvrk06.poppers.local:1120
TCP SQL-POPPERS:ms-sql-s pcvrk03.poppers.local:1154
TCP SQL-POPPERS:ms-sql-s pcvrk03.poppers.local:1652
TCP SQL-POPPERS:ms-sql-s pcvrk04.poppers.local:1112
TCP SQL-POPPERS:ms-sql-s pcvrk09.poppers.local:1100
TCP SQL-POPPERS:ms-sql-s pcvrk09.poppers.local:2141
TCP SQL-POPPERS:ms-sql-s pc-ink09.poppers.local:110
TCP SQL-POPPERS:ms-sql-s pc-ink09.poppers.local:279
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:1126
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:2026
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:2075
TCP SQL-POPPERS:ms-sql-s pczim01.poppers.local:2238
TCP SQL-POPPERS:ms-wbt-server labtop-henk.poppers.local:
ok