[CentOS] ekiga: having problems getting ekiga to make connections

greetings,

using: CentOS 6.7 current KDE 4.3.4 ekiga 3.2.6

i am having problems getting ekiga to make any type of connection.

i have gone thru documentation and troubleshooting manuals with out finding reason other than;

~]$ ekiga -d 4 2>&1 | grep "PDU is likely too large" ~]$ echo 3600 > /proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout \ bash: /proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout: \ No such file or directory

~]$ echo 3600 > /proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout_stream \ bash: /proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout_stream: \ No such file or directory

as close as above path goes, it is;

/proc/sys/net/ipv4/

there is no 'netfilter' directory.

what am i missing and misunderstanding?

tia.