How to check TTL for multicast on Centos 7 ?
by bsparks from LinuxQuestions.org on (#6GZW7)
Hi,
I have Centos 7 VM. Network guys are saying that TTL for multicast of this VM is set to 25, hence firewall assumes it is DDOS and drops the packets. On OS level, is there a way to know, what is TTL ?
I want to set it to 10. I found one this URL , and it gives me two options to set :
Code:# iptables -t mangle -A OUTPUT -d <multicast_ip_addr> -j TTL --ttl-set 64Code:# firewall-cmd --direct --add-rule ipv4 mangle OUTPUT 0 -d <multicast_ip_addr> -j TTL --ttl-set 64But I do not have firewall and iptables enabled on my servers. Is there any different way to set it to 10 ?
Please suggest.
Thanks
I have Centos 7 VM. Network guys are saying that TTL for multicast of this VM is set to 25, hence firewall assumes it is DDOS and drops the packets. On OS level, is there a way to know, what is TTL ?
I want to set it to 10. I found one this URL , and it gives me two options to set :
Code:# iptables -t mangle -A OUTPUT -d <multicast_ip_addr> -j TTL --ttl-set 64Code:# firewall-cmd --direct --add-rule ipv4 mangle OUTPUT 0 -d <multicast_ip_addr> -j TTL --ttl-set 64But I do not have firewall and iptables enabled on my servers. Is there any different way to set it to 10 ?
Please suggest.
Thanks