Port is a generic term that can refer to port number (software related term), and computer hardware port. Here, questions referencing this tag refer to port numbers.

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nginx - connect() failed upstream under load testing

I've been doing some load testing with wrk of my nginx reverse proxy -> my web app setup and I noticed that when I get to 1000+ concurrent connections, nginx starts returning 502s and the following ...
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198 views

Deploy multiple applications in Cherokee and distinguish them by port?

I am having an issue on deploying applications with Cherokee web server. The thing is I need to host various Django applications in the same machine and distinguish each one by ports (i.e. app1 in ...
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57 views

create tunnel in order to access https via port 443

I have win machine that connected to Linux server 192.9.100.10 And Linux server has connectivity to the IBM blade center management GUI - 192.9.100.200 From my WIN machine I not have connectivity to ...
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30 views

SSH Tunnel connection issues

I am having difficulty with an SSH Tunnel which keeps dropping. i have tried with a variety of ports and have checked the event viewer to see if there's any information there but as yet have found ...
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33 views

UFW Firewall on Ubuntu

I have installed UFW on Ubuntu 14.04. I used following commands to enable a port: sudo ufw allow 9384/tcp When I used the status command (sudo ufw status) it shows me that port is open for both IP4 ...
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208 views

“connection closed by foreign host” on one port but not another

server1 (suse linux) should be able to connect to server2 (redhat linux) on ports 4750 and 1080. when server1 connect to server2 (using telnet as a test) using 4750, the connection stays up and open. ...
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37 views

Cisco multi switch / multi VLAN monitoring

I have a DMZ and a internal LAN with VLANs that I wish to port monitor by means of a NIDS and three switches, if this is possible. Switch 1 (DMZ) 2950 / VLAN 10 & trunk port to Switch 3 Switch 2 ...
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546 views

Nginx secure port 443 is not opened/ connection refuse

I have installed nginx on my ubuntu VM. There I want Nginx to listen 443 port. My configurations are as follows. server { listen 443; server_name wso2test.com; ssl on; ...
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396 views

Trying to change a custom VPN port back to the original on Fortigate 40C

We recently changed our firewall and bought a Fortigate 40C device. We wanted to use our old VPN settings. The Fortigate support technician told us that this model was new and he didn't know it in ...
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54 views

what is PAT exactly?

In attempt to understand PAT, I've setup the following setup where I have a Linux Router that masquerades from in internal interface to the external. Thus both clients are able to talk to outside ...
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3k views

How to reverse proxy specific ports to a different server behind a firewall using Apache mod_proxy

I have two Web severs, one Apache 2 and the other IIS 8, and both are on a LAN behind a firewall. I have ports 80, 443, and 8080-8088 open on the firewall. I have an externally hosted DNS A record ...
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88 views

forward a specific port from linux server (ubuntu) through firewall server (ubuntu)

I'm doing the following: % autossh -i YYY.pem XXX@SERVER -N -R 90:localhost:9000 -o ServerAliveInterval=30 to forward a server port from the local machine to the public machine. But connections ...
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39 views

Java BindExceptions in delayed stop/start conditions

I have a script that will automatically stop a server and restart it on the same port/ip address. I've noticed that some mornings the server doesn't restart successfully because it gets Java ...
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1k views

Port seems to be in use although the corresponding process has already terminated on AIX 6.1

While running some kind of automated tests on our AIX 6.1 machine we are facing the problem that a port seems to be in use although the corresponding process has already terminated. E.g. if we kill a ...
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86 views

can't connect to a server through specific port

From my server I'm trying to connect to another server I'm trying using the command via SSH telnet 64.31.62.219 60099 it is connecting without problem on my local machine and from a server I ...
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13k views

Cannot telnet to SQL Server on port 1433

I've been working solidly on this issue for the past three weeks. I cannot seem to find where the actual issue is. I just recently found this article on how to troubleshoot the connection. I made it ...
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3k views

How to open ports in Cisco ASA 5505 using ASDM?

am new to cisco and i badly need help in opening ports using ASDM. I already tried natting but it only allows 1 outside and 1 inside rule ex. Inside Static Rules 10.x.x.x outside 72.x.x.x Outside ...
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419 views

Cisco ASA 8.4 Port Forwarding Site-to-Site VPN

I have a Cisco ASA (running ASA 8.4) which has a Site to Site IPsec tunnel to three sites. These sites have overlapping address ranges, so on my ASA I have setup NAT so everything is accessible. I ...
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229 views

ejabberd changing ports?

I changed the ports in the listen section (just added a 1 in front of them) in the /etc/ejabberd/ejabberd.cfg, but after a /etc/init.d/ejabberd restart The server still listens on the original ...
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553 views

VisualSVN Port Forwarding is Not Resolving

I am using the FreeDNS Update client to dynamically update the IP address of a subdomain. I can access https://localhost:8282/svn/ on the laptop but I cannot access it from ...
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282 views

Is it fundamentally wrong to ask an FTPS client to connect on port 990/989 using explicit mode?

I have recently setup vsftpd to listen on port 990 for FTP over explicit SSL. I know from the RFCs that 990 is normally used for implicit. However, we have other FTPS servers accessed from the ...
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165 views

Trying to connect to sql server on ec2

I moved from my home office to an office in midtown. I can't figure out how to connect to my sql server hosted on Amazon. I'm using the exact same VmWare image just on a machine in the office. I can ...
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946 views

CruiseControl doesn't run as a Windows service

I am having a problem with CruiseControl on Windows. I can get CruiseControl to run on its own without problems right after installation. However, when I run the Windows service for cruise control ...
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20 views

Trying to access port 3306 (only using it locally)

I am trying to open port 3306 on my archlinux distro. I've tried multiple different iptables settings, but I can't seem to get it to work. (Locally) Here's my current iptables setting: Chain INPUT ...
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30 views

Debian Openvpn port closed

Newbie in linux! there is already similar questions are asked here, but the solutions are not working for me. can somebody help me with this issue: I have been installed openvpn server on debian 8.1 ...
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20 views

amazon server using RedHat EL 7 on port 3306 so that i can access mysql database remotely

I want to remotely access mysqld on port 3306 but when hen i telnet from public ip address i get a connection time out error. Whats happening here. But within the server telnet is working just fine ...
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14 views

IIS 7.5 - Not listening 0.0.0.0:80

I am using IIS 7.5 on Windows Server 2008 R2. From this server, I can access the localhost (standard IIS start page is displayed). But I can't access it from any other machine belonging to the same ...
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17 views

iptables open port to an LXC container with public IP

I've encountered a strange problem I have no idea how to fix. I'm trying to close all ports on my server, and open only the ports I need in the directions I need. Thus, I ended up with: IF=eth0 ...
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42 views

Netsh does not work as expected

I work with windows. my IP on the local network is A.B.C.D I have a service that runs on a network private to my machine @ IP E.F.G.H and port X I want users on my network to access the service ...
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24 views

Network syslog with port number

I am collecting syslog from VoIP phones over the network and it is usual having several phones behind same NAT device. I need to collect syslog files to different files or be able to differ lines ...
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47 views

How to check if connection is working before load balancer decides which server to use

I am working on a project whereby we deliver a secure site for our customers. We host the sites on two servers behind a load balancer but have port connections (24000-24100) to each database. The ...
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66 views

Socket Error 10054 - VS2013 Web Deploy Failing

I'm having trouble completing a web deploy from VS2013 as I posted in VS 2013 Web Deploy failure: Warning : Retrying the sync because a socket error (10054) occurred Apparently web deploy uses port ...
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84 views

Opening port 8000 for WCF on Azure

I created a virtual instance on Azure and deployed a couple of WCF services for testing, and also installed IIS. Then I added TCP endpoints for ports 80, 8000, and 8001. The services run on ports ...
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15 views

What part of the reboot cycle in Linux is WinSCP detecting as FTP port 21 being available?

When I rebooted one of my boxes running Ubuntu Server LTS 14.04.1 today, I received a strange message from WinSCP during the automated reconnect attempt that I've never seen before: ...
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68 views

Ubuntu 14.04 LTS, RDIFF-BACKUP, data source and destination on remote machines

i've got a problem with rdiff-backup... I have three systems: System-A: Data source, SSH on port 1234 System-B: Backupspace, SSH on port 22 System-C: Executive system which runs rdiff-backup. my ...
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79 views

How to prohibit connections on port 25 except from real mail servers - exim, ubuntu

I'm fairly new to email servers, and my VPS has being blacklisted (for the second time) IP Address 45.56.85.76 is listed in the CBL. It appears to be infected with a spam sending trojan, proxy ...
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18 views

Ganglia server in Google Cloud

Fairly new to the google platform. I needed to open up port 8649 for a ganglia server environment. When I modified the default network and added the port it shows that tcp:8649 is opened. I'm able to ...
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47 views

PCI says port 36141:TCP is blocked. But 36141:TCP open on iptables

PCI compliant scan fails due to port 36141:TCP is being blocked on website. I verified I cannot connection via 36141 on same server to itself: # nc -zv 127.0.0.1 36141 nc: connect to 127.0.0.1 port ...
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112 views

Port not opening even after adding security group rules on Amazon EC2 instance

I have an Amazon EC2 Linux instance. I recently installed SmartFoxServer in my instance. For that I needed to open 9933 port. So I just created inbound rules on Amazon EC2 Manager console website. My ...
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51 views

IIS 7 Reverse Proxy based on subdomain and port

Using a single Windows server with IIS7 I would like to reverse proxy three sites rewrite: http:// site1.mydomain.com --> http:// internal:111 http:// site2.mydomain.com --> http:// internal:222 ...
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68 views

Forward ports Fotigate, multiple ports

I need a you guys help. I can not solve , I need ideas . I am implementing a FortiGate 140, my difficulty being to perform port forwarding , I need make redirecting a ip in the case . example : ...
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39 views

Many webapps, one vps

Might be a noob question, Google and SF searches didn't turn up anything super useful. Could be using the wrong words here. I've got a vps, with one port 80 app running on it. I'd like to add two ...
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253 views

OpenVPN Port forwarding on a OpenVZ VPS

I've been trying for the past 3 hours to forward the 443 port from my client to the 20443 port on my server (CentOS 7 on OpenVZ), so i can access it on myserverip:20443. I have OpenVPN Access ...
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53 views

Network access sometimes lost, disabling port security temporary solves?

I have network based primarily on Edge-Core managed switched. Port security with max mac count = 1 is enabled, DHCP snoopping enabled. Some clients have troubles with accesing network, but when I ...
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55 views

RPC Ports getting reset to 5000-5002 on reboot

I've run into a very common issue with RPC Endpoint Mapper ports not being available. The default RPC ports are 5000-5002. When I edit the registry and set the ports to a wider range (say, xx100 - ...
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111 views

Dell 5548P, MIB value for port security violation notification

Anyone have idea on MIB values(OID value) for Port security violation notification with dell 5548P switches.On Cisco its [1.3.6.1.4.1.9.9.315.0], not sure whether i can use the same for montioring ...
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71 views

Filtered port 22 with no firewall settings

I'm trying to connect to an sftp server from a CentOS 5.5 server. The connection is never established. When I run the command: nmap -p 22 -P0 <sftp server address> PORT STATE SERVICE ...
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332 views

Server 2012 R2 Telnet

Let me first get the infrastructure out of the way. We have one 2012 R2 Server acting as the Hyper V host for 2 servers. The two virtual machines is one 2012 R2 Server and one 2003 SBS server that we ...
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3k views

Windows TCP Port 139 Netbios-ssn vulnerability

I ran netstat -b on my computer. Two results showed that I do not understand, VAIO being another PC on the LAN. [firefox.exe] TCP 192.168.100.106:49186 VAIO:netbios-ssn TIME_WAIT TCP ...
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102 views

Network Issues Connection to SQL database on MS server

Prior to asking this question, I followed this thread: Cannot telnet to SQL Server on port 1433 I am attempting to connect to a database on a server distinct from the computer upon which I am ...