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fuss:openssh [2020/12/16 07:39] – [Enabling Diffie-Hellman-Group-SHA1 Key Exchange] officefuss:openssh [2021/04/14 15:50] – [Fixing Various Network Issues] office
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   * issuing commands with large output over SSH makes the SSH session hang   * issuing commands with large output over SSH makes the SSH session hang
  
-They may all boil down to a non-uniform MTU setting across the network.+They may all boil down to a non-uniform MTU setting across the network. This problem typically shows up with IoT devices (including the Raspberry Pi) that have a trimmed down networking stack (either wireless or low end network devices) that do not allow setting the MTU past ''9000''. 
 + 
 +In case changing the MTU for the entire network is undesirable, then make sure that the settings: 
 +<code> 
 +net.ipv4.ip_no_pmtu_disc = 1 
 +net.ipv4.tcp_mtu_probing = 1 
 +</code> 
 + 
 +are set with ''sysctl'' on the device and on the gateway endpoint. Similarly, ICMP and IGMP should not be blocked across the network because the packets are crucial to negotiating packet transfers.
  
  
fuss/openssh.txt · Last modified: 2022/04/19 08:28 by 127.0.0.1
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