From d8533ca3a643cfe7b2491a19e27dff5b460c5da3 Mon Sep 17 00:00:00 2001
From: Keith Winstein <keithw@mit.edu>
Date: Thu, 9 Feb 2012 00:36:28 -0500
Subject: [PATCH] Get rid of PMTU discovery; Cisco VPN has MTU=1200 and breaks
 ICMP too-big.

---
 src/network/network.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/network/network.cc b/src/network/network.cc
index 20ac835..8057dc0 100644
--- a/src/network/network.cc
+++ b/src/network/network.cc
@@ -94,8 +94,8 @@ void Connection::setup( void )
     throw NetworkException( "socket", errno );
   }
 
-  /* Enable path MTU discovery */
-  char flag = IP_PMTUDISC_DO;
+  /* Disable path MTU discovery */
+  char flag = IP_PMTUDISC_DONT;
   socklen_t optlen = sizeof( flag );
   if ( setsockopt( sock, IPPROTO_IP, IP_MTU_DISCOVER, &flag, optlen ) < 0 ) {
     throw NetworkException( "setsockopt", errno );