Visit Our UNIX and Linux User Community

opening ports

Thread Tools Search this Thread
Special Forums Cybersecurity opening ports
# 8  
Old 03-06-2002
I posted my last post before I read the previous reply. I tried using iptables, and it seems to be not working on this box. I get an error message:
"...ip_tables.o: init_module: Device or resource busy" and that insmod failed on ip_tables.o. Note that ping, ssh, telnet and ftp connectoins are all accepted and work fine.
# 9  
Old 03-07-2002
This followup might be useful for others who might be moving existing code from Windows. The IP ports issues were the least of my problems. I was porting this code from Windows. Win32 ignores the first parameter of the select() system call. I had n=1. In Linux that must be the *value* of the highest socket descriptor +1, *not* the number of sockets to be tested, or select will not return. Typically, that value would be reassigned anytime a new socket descriptor is allocated. That assumes that the system will allocate always-increasing socket descriptor values. I stuck INT_MAX in there and it works fine. It probably causes a little extra processing to traverse every possible socket descriptor value in the fd_sets, but it simplifies the code.

Thanks for the help.
# 10  
Old 03-21-2002
Socket Bindind Issues!!!

Now what Language did you write this Socket w/ {PERL , C++ , etc};

Is the Program really listening? - use netstat.

What protocol is the program using - TCP , UDP?

See is you can telnet the port and get a possible socket hang - that indicates that something is listening.

Test locally on the running server before remotely /!\.

Previous Thread | Next Thread
Test Your Knowledge in Computers #319
Difficulty: Medium
The open source program Redis is a relational database server.
True or False?

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Who are all opening my datasets,?

Hi, I need a command/script, who opened my dataset, consider a situation like, if a user has opened the dataset few days back then, that command/script should list his/her id. I don't want audit on my dataset, i need only list of users who are using my dataset. Thank you. (10 Replies)
Discussion started by: subbarao12
10 Replies

2. Cybersecurity

Opening ports 8015/8016 restricted to selected IP addresses

Hello there I'm using a vendor-supplied application on RHEL4 that includes a built-in Tcl webserver. The webserver is working but I cannot access it from any computer other than the host workstation. I suspect that the firewall is blocking ports 8015/8016. I have two questions: 1. How do... (1 Reply)
Discussion started by: craig3201
1 Replies

3. Solaris

SMC not opening

I am working with Solaris 9.In that I am trying to open SMC(Solaris Management Console) but when I am clicking it,nothing is opening. Can any1 tell me why it is not opening??:confused: (1 Reply)
Discussion started by: smartgupta
1 Replies

4. Solaris

Please help with opening a port??

Hello all, I need assistance... I need to open a port # 36677 and have it remain open even after a power cycle. I thought all I needed to do was add it to /etc/services. That was not it... Can someone please tell me how to do this. Thank you. (6 Replies)
Discussion started by: komputersman
6 Replies

5. IP Networking

problem opening TCP ports

Please can somebody help me. I'm trying to open ports 999, 1982 and 1983 but am not having much luck. I used iptables -A INPUT -i eth0 -p tcp --sport 999 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -i eth0 -p tcp --sport 1982 -m state --state NEW,ESTABLISHED -j ACCEPT iptables... (5 Replies)
Discussion started by: thehaapyappy
5 Replies

6. UNIX for Dummies Questions & Answers

Opening TCP ports

I'm not sure if this is the right place for this post, but I'd be grateful if somebody could please help me. I'm trying to open ports 999, 1982 and 1983 but am not having much luck. I used iptables -A INPUT -i eth0 -p tcp --sport 999 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -i... (2 Replies)
Discussion started by: thehaapyappy
2 Replies

7. AIX

Opening ports

Hi guys, I need to open ports on my AIX machine. The only way I know is to use service name to disable or enable ports which are used by the services. I found in /etc/services that the ports are unidentified. Btw, I want to open port number 11576 and 11577. Need help on this one. Thanks! :) (1 Reply)
Discussion started by: raskita
1 Replies

8. UNIX for Advanced & Expert Users

Opening CDE

I have installed JASS on one of my sun servers. I am now trying to open for CDE. For that I have done these steps: mv /etc/rc2.d/_S71rpc.JASS.* /etc/rc2.d/S71rpc mv /etc/rc2.d/_S99dtlogin.JASS* /etc/rc2.d/S99dtlogin but still no CDE. Any advice on this?? (3 Replies)
Discussion started by: encrypted
3 Replies

9. UNIX for Dummies Questions & Answers

Opening files

I am very new to unix. I want to open a file and read one line in at a time. Can anybody help? (3 Replies)
Discussion started by: saarshad001
3 Replies

Featured Tech Videos