由于某种原因，我无法以任何方式在我的Ubuntu 18.04计算机上加载Github。我尝试了Crome和Firefox。我尝试使用-取消设置代理

git config --global --unset http.proxy
git config --global --unset https.proxy

我也尝试将其设置为空白

git config --global http.proxy ""
git config --global https.proxy ""

我想清除缓存，手动删除并在主文件夹中重新创建.gitconf文件。但是似乎没有任何作用。git clone请求也不会从命令行执行。该站点仅声明连接已超时。

我终于尝试使用wireshark捕获连接信息。当我输入github.com中的任何URL时，它什么也没有给出。几分钟后，当我收到超时错误时，我从wireshark收到了此消息-

No.     Time           Source                Destination           Protocol Length Info
    205 115.210340122  192.168.29.136        35.224.99.156         TCP      74     54616 → 80 [SYN] Seq=0 Win=64240 Len=0 MSS=1460 SACK_PERM=1 TSval=1144885874 TSecr=0 WS=128

Frame 205: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface 0
Ethernet II, Src: D-LinkIn_ac:e5:4a (78:32:1b:ac:e5:4a), Dst: 14:ae:85:e1:09:98 (14:ae:85:e1:09:98)
Internet Protocol Version 4, Src: 192.168.29.136, Dst: 35.224.99.156
Transmission Control Protocol, Src Port: 54616, Dst Port: 80, Seq: 0, Len: 0

No.     Time           Source                Destination           Protocol Length Info
    214 116.211223359  192.168.29.136        35.224.99.156         TCP      74     [TCP Retransmission] 54616 → 80 [SYN] Seq=0 Win=64240 Len=0 MSS=1460 SACK_PERM=1 TSval=1144886875 TSecr=0 WS=128

Frame 214: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface 0
Ethernet II, Src: D-LinkIn_ac:e5:4a (78:32:1b:ac:e5:4a), Dst: 14:ae:85:e1:09:98 (14:ae:85:e1:09:98)
Internet Protocol Version 4, Src: 192.168.29.136, Dst: 35.224.99.156
Transmission Control Protocol, Src Port: 54616, Dst Port: 80, Seq: 0, Len: 0

No.     Time           Source                Destination           Protocol Length Info
    215 118.227149032  192.168.29.136        35.224.99.156         TCP      74     [TCP Retransmission] 54616 → 80 [SYN] Seq=0 Win=64240 Len=0 MSS=1460 SACK_PERM=1 TSval=1144888891 TSecr=0 WS=128

Frame 215: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface 0
Ethernet II, Src: D-LinkIn_ac:e5:4a (78:32:1b:ac:e5:4a), Dst: 14:ae:85:e1:09:98 (14:ae:85:e1:09:98)
Internet Protocol Version 4, Src: 192.168.29.136, Dst: 35.224.99.156
Transmission Control Protocol, Src Port: 54616, Dst Port: 80, Seq: 0, Len: 0

No.     Time           Source                Destination           Protocol Length Info
    220 122.387150649  192.168.29.136        35.224.99.156         TCP      74     [TCP Retransmission] 54616 → 80 [SYN] Seq=0 Win=64240 Len=0 MSS=1460 SACK_PERM=1 TSval=1144893051 TSecr=0 WS=128

Frame 220: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface 0
Ethernet II, Src: D-LinkIn_ac:e5:4a (78:32:1b:ac:e5:4a), Dst: 14:ae:85:e1:09:98 (14:ae:85:e1:09:98)
Internet Protocol Version 4, Src: 192.168.29.136, Dst: 35.224.99.156
Transmission Control Protocol, Src Port: 54616, Dst Port: 80, Seq: 0, Len: 0

No.     Time           Source                Destination           Protocol Length Info
    227 130.706783205  192.168.29.136        35.224.99.156         TCP      74     [TCP Retransmission] 54616 → 80 [SYN] Seq=0 Win=64240 Len=0 MSS=1460 SACK_PERM=1 TSval=1144901243 TSecr=0 WS=128

Frame 227: 74 bytes on wire (592 bits), 74 bytes captured (592 bits) on interface 0
Ethernet II, Src: D-LinkIn_ac:e5:4a (78:32:1b:ac:e5:4a), Dst: 14:ae:85:e1:09:98 (14:ae:85:e1:09:98)
Internet Protocol Version 4, Src: 192.168.29.136, Dst: 35.224.99.156
Transmission Control Protocol, Src Port: 54616, Dst Port: 80, Seq: 0, Len: 0

请帮忙。