Login or Register to Ask a Question and Join Our Community


Linux

Security issue with TCP SYN packets on Linux

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Operating Systems Linux Security issue with TCP SYN packets on Linux
# 1  
Old 03-11-2005
Question Security issue with TCP SYN packets on Linux
Hi all,

A security scanner has been done on a linux server and have found that

The remote host does not discard RCP SYN packets which have the FIN flag set.

It tells that I need to request a patch which I haven't found yet.

I have Red Hat Linux release 7.0 (Guinness)
Kernel 2.2.16-22 on an i686

Anyon can help me looking for this patch or any other solution to this problem.

thanks
# 2  
Old 03-20-2005
is any particular reason you can't just upgrade to a 2.6 kernel?
# 3  
Old 03-22-2005
Linux 2.6
Hi thmnetwork,

will upgrade hopefully by end of this year, but the issue is that a security audit has been done and need to 'fill out' all the possible holes..

I guess I'll use the ipchains firewall for that.


thanks for your reply.

Bert.n
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. IP Networking

TCP MSS Issue

Gretings! I have developed simple utility using Berkly sockets interface: So, what do I? $ ifconfig lo mtu 1500 $ make //run netcat $ ./target 127.0.0.1 5555 1460 1000000 #mss: 1460, loop sleep: 1s On other virtual terminal: $ netcat -l 127.0.0.1 -p 5555 On third virtual terminal: #... (1 Reply)
Discussion started by: denis4inet
1 Replies

2. IP Networking

TCP Same Ack Sequencing for Two Packets

I was analyzing a TCP snoop. And found following scenario From Server to Client ---> SEQ 2993 ACK 1744 WIN 8192 LEN 13 From Server to Client ---> SEQ 3006 ACK 1744 WIN 8192 LEN 13 From Client to server --> SEQ 1744 ACK 3019 WIN 3304 I just want to know Why Packet 1 and 2... (3 Replies)
Discussion started by: mr_deb
3 Replies

3. IP Networking

Packets sent from Linux TCP socket

Hello, Our software is using a TCP socket (AF_INET, SOCK_STREAM) to communicate with an Ethernet device. When we send a message, the message object writes itself in full onto the socket's stream buffer before the software invokes send() from socket.h. I'm still researching, but have 2... (1 Reply)
Discussion started by: bix_20002000
1 Replies

4. IP Networking

how to hack linux driver to delay incoming packets

hello, can anyone suggest how to delay the incoming packets ?? or how the packets are prossed inside the kernal and a way to make the packets wait a while?? it wud be vry helpful regards sameer (7 Replies)
Discussion started by: sameer kulkarni
7 Replies

5. Solaris

TCP SYN timer

Can anybody please tell me how I can figure out on a solaris server how long it would take a TCP SYN request to timeout before it gets a SYN_ACK back? Thanks, (3 Replies)
Discussion started by: Pouchie1
3 Replies

6. Linux

Linux dhcp client boot process with packets traffic

Hi Everybody, I would like to know the entire network packets exchange, sequence between a linux dhcp client workstation & dhcp server as client comes up starting from OS booting stage as network service starts to the time client gets dhcp IP address. This would be in a typical LAN ... (2 Replies)
Discussion started by: sudhirav
2 Replies

7. UNIX for Dummies Questions & Answers

Linux box drops the incoming packets

Hi all, I am new to Linux kernel. we have a c file that counts the no. of sends and received packets in each interface, and indicate the user about the error/drop ration of incoming and outgoing packets. in our Linux box , the incoming packets are dropped at random interval. we have our... (1 Reply)
Discussion started by: kannandv
1 Replies

8. IP Networking

Could a tcp issue be causing a null pointer exception?

The client's app gets a 'suspend error' which they say is due to a null pointer exception. Application people say nothing's wrong with the app. Network people say the network's fine. I'm supposed to see what's wrong with the system to be causing this error. I checked the NIC card settings, which... (1 Reply)
Discussion started by: pmichner
1 Replies

9. Red Hat

How to check the outbound packets in Linux

I have a linux redhat box , our security department in my company informed me that my server's IP sends So many traffic in my network , This box I am using it as FTP server to store the other servers logs . My question briefly is how to check my outbound packets which are going from my PC to the... (1 Reply)
Discussion started by: DarkSoul
1 Replies
Login or Register to Ask a Question