$cat /proc/sys/net/ipv4/tcp_mtu_probing 0 $
tcp_mtu_probing - INTEGER Controls TCP Packetization-Layer Path MTU Discovery. Takes three values: 0 - Disabled 1 - Disabled by default, enabled when an ICMP black hole detected 2 - Always enabled, use initial MSS of tcp_base_mss. source : Linux kernel Documentation. 2.6.32
147: /* Black hole detection */ 148: tcp_mtu_probing(icsk, sk); 149: android.git.kernel.org/kernel/msm.git - GPL - C - More from msm.git ยป boot/current/System.map 22728: c044a390 B sysctl_tcp_workaround_signed_windows 22729: c044a394 B sysctl_tcp_mtu_probing 22730: c044a398 B sysctl_tcp_orphan_retries download.asn.pl/.../lintrack-2.0/pkg/linux-2.6.17-8-big.pkg.tar.gz - Unknown
Path MTU discovery (PMTUD) is a technique in computer networking for determining the maximum transmission unit (MTU) size on the network path between two Internet Protocol (IP) hosts, usually with the goal of avoiding IP fragmentation. --- Wikipedia The Free Encyclopedia